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Electro-Music Klee Sequencer Building Instructions

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Building the
electro-music
Klee Sequencer
Issue: 6
Copyright © 2008, electro-music.com
This document may be freely reproduced and distributed in its un-altered form.
Cover photography by Tom Bugs
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Summary of Contents for Electro-Music Klee Sequencer

  • Page 1 Building the electro-music Klee Sequencer Issue: 6 Copyright © 2008, electro-music.com This document may be freely reproduced and distributed in its un-altered form. Cover photography by Tom Bugs...

  • Page 2: Table Of Contents

    Chapter 7: Building the Boards……………………………………………………69 Chapter 8: Final Assembly of the electro-music Klee Sequencer…………………91 Chapter 9: electro-music Klee Sequencer Bring-Up Procedure…………………...97 Chapter 10: Calibrating the electro-music Klee Sequencer………………………..109 Appendices Appendix A: Analogue Board Bill of Material…..........A1 Appendix B: Digital Board Bill of Material………..……………………….B1...

  • Page 3: Electro-Music Klee Sequencer

    You will also want to give consideration to panel layout and labeling, especially as to the labeling of switch positions, etc. Most of the electro-music Klee sequencer functions are what could be considered as "standard". In other words, without these standard functions, its functionality would be limited as compared to the concept of the operation.
  • Page 4 Pads are supplied on the Analogue PCB to allow external digital signals to select the voltage range of the Klee Sequencer, in effect “over-riding” the Range Switch. These signals would have to be 0V for low and 15V for high (12V if the Klee is operated from a twelve volt supply).
  • Page 5 Power Requirements electro-music Klee Sequencer has been tested using a +/- 12V power supply. It may or may not require an adjustment of the 6K8 current limiting LED resistors – 4K7 will work if brightness is an issue. However, the Klee has been most extensively tested at +/15V operation and it is generally recommended.

  • Page 6: Chapter 2: Designing The Front Panel

    Klee Sequencer, that is left totally in your capable hands. The front panel of the Klee Sequencer is its operating console, and you will find that is where a good 90% of your build time is spent. After that, that’s where 100% of your operating time will be spent, so think long and hard about how you want it to be arranged.
  • Page 7 Table 2-1: Potentiometers and Their Functions Label Function Stage 1 Programming Pot - Adjusts the voltage of Stage 1 Stage 2 Programming Pot - Adjusts the voltage of Stage 2 Stage 3 Programming Pot - Adjusts the voltage of Stage 3 Stage 4 Programming Pot - Adjusts the voltage of Stage 4 Stage 5...
  • Page 8 Table 2-2: Toggle Switches and Their Functions Label Function Pattern Switch 1 Programs a 1 or 0 for pattern bit 1 Pattern Switch 2 Programs a 1 or 0 for pattern bit 2 Pattern Switch 3 Programs a 1 or 0 for pattern bit 3 Pattern Switch 4 Programs a 1 or 0 for pattern bit 4 Pattern Switch 5...
  • Page 9 Label Function Optional Selects between an applied external voltage and an internal External/Internal variable range voltage to be applied as the maximum range of the Range Switch programming pots. Total Number of Toggle Switches: 40 Standard, 2 more with available Options Table 2-3: Momentary Pushbutton Switches and Their Functions Label Function...
  • Page 10 Table 2-6: LED Indicators and Their Functions Label Function Pattern Bit 1 Indicates active bit/stage 1 Pattern Bit 2 Indicates active bit/stage 2 Pattern Bit 3 Indicates active bit/stage 3 Pattern Bit 4 Indicates active bit/stage 4 Pattern Bit 5 Indicates active bit/stage 5 Pattern Bit 6 Indicates active bit/stage 6...

  • Page 11: Chapter 3: Mounting Parts To The Front Panel

    By now, you’ve probably realized that there are a lot of components on the electro-music Klee Sequencer front panel. Really, the only time during the build when you’ll be looking at your panel from the pretty, labeled front side is when you’re orienting the parts and calibrating the thing.
  • Page 12 (umm…open). It’s hard to tell which position is which. Some manufacturers of switches may mark it on their terminals, others may not. You decide which is right, and which in an illusion, to quote the Moody Blues. How do you do this? It takes an ohmmeter or a continuity tester, or, better yet, a DMM with a continuity tester built in.
  • Page 13 Though the orientation of the remaining switches, aside from the rotary Range Switch, does not matter at this stage, it’s best to be sure you have the right switches in hand when you’re ready to mount the components. The gate bus switches are SPDT ON-OFF-ON type switches. The “ON-OFF-ON” label signifies they have three positions.
  • Page 14 ----- ----- Figure 3-2: SPDT ON-OFF-ON in the Center Position Now, without moving the switch lever position, remove the DMM lead from the “lower” terminal it’s connected to and move it to the “upper” terminal. Now the connection between the “upper” terminal and the center terminal should be shorted, while the switch lever is in the down position.
  • Page 15 between the center and “lower” terminals of the switch. Now remove the DMM lead from the “lower” terminal of the switch and place it on the “upper” terminal of the switch. With the lever in the down position, you should have a short between the “upper” terminal and the center terminal.
  • Page 16 The health and longevity of your electro-music Klee sequencer is dependent on this value. In other words, don’t do it. If you have any doubt, breadboard it, and you will find the brightness is quite enough.
  • Page 17 If you’re using banana jacks, this is one of the benefits and luxuries of your jack of choice – a banana jack has only one connection, so that leaves little up to chance. But 1/4” and 3.5mm jack users must keep track which lug is the ground and which lug is the “tip”.
  • Page 18 Figure 3-8: Locating the Ground Lug Back to that “third” lug: One option of the electro-music Klee Sequencer, called the “Auto Switching External/Internal Range Option” (number 3 on page 9 of the front panel/interconnect schematic) requires a normally closed (n.c.) switching jack. This type...
  • Page 19 “tip” lug only when a plug is not plugged into the jack. You know which lug is your “tip” lug, so connect one lead of your DMM to that, and connect the other lead to the “third” lug. If your cable is not plugged into the jack, you should read zero ohms (have continuity) between these two lugs.
  • Page 20 Table 3-2: Panel Mount Potentiometer List Label Panel Des Type (300 Series) Programming Pot 1 50K Linear Panel Mount Pot Programming Pot 2 50K Linear Panel Mount Pot Programming Pot 3 50K Linear Panel Mount Pot Programming Pot 4 50K Linear Panel Mount Pot Programming Pot 5 50K Linear Panel Mount Pot Programming Pot 6...
  • Page 21 Label Panel Des Type (300 Series) Pattern Switch 15 SW15 SPST ON-OFF Pattern Switch 16 SW16 SPST ON-OFF Gate Bus Switch 1 SW17 SPDT ON-OFF-ON Gate Bus Switch 2 SW18 SPDT ON-OFF-ON Gate Bus Switch 3 SW19 SPDT ON-OFF-ON Gate Bus Switch 4 SW20 SPDT ON-OFF-ON Gate Bus Switch 5...
  • Page 22 Table 3-6: Panel Mount Connectors Label Panel Des Type (300 Series) A Output Jack of Choice B Output Jack of Choice A+B Output Jack of Choice Optional Output A Jack of Choice Optional Output B Jack of Choice Optional Output A+B Jack of Choice Master Gate Jack of Choice...
  • Page 23 Label Panel Des Type (300 Series) Gate Bus 2 LED High Efficiency Red LED Gate Bus 3 LED High Efficiency Red LED Random Reference LED High Efficiency Red LED And, one last thing before you begin – NO GORILLA FISTING. In other words, make things tight, but don’t overly wrench those things on there - especially the switches.

  • Page 24: Chapter 4: Strap Wiring The Front Panel

    Most of the panel components will need to be strapped to either Digital Ground, Analog Ground, Bus 1, or Bus 3. If you look at the Front Panel/Interconnect schematic of the electro-music Klee Sequencer, you will notice that Analog Ground is labeled “Analog...
  • Page 25 Grnd” and Digital Ground is labeled “Digital Grnd”. The Bus 1 and Bus 3 connections appear on page 3 of that schematic. There are a few “sundry” connections that can be made at this point as well – the connection from the Clock Input Jack to the Clock Enable Switch, for example, or if used, the connection between the External Load Input Jack and the optional External Load Enable Switch.
  • Page 26 Digital Ground Strap Connection Procedure o Pattern LEDs 1 through 16 Connect all of the pattern LED cathodes together. By now, you’ve probably got a pretty good idea which lead is the cathode. If not, go back and read the first sections of this document again.
  • Page 27 o Gate Bus LEDs Connect the Gate Bus 1, Gate Bus 2, Gate Bus 3 and Master Gate Bus LED cathodes together. Connect the cathodes together about one quarter to a half inch from the rear of the LED. Again, make sure you don’t get the LEDs too hot. Snip off any excess cathode lead length.
  • Page 28 o Clock LED Connect the Clock LED cathode to the nearest digital ground connection. Connect to the cathode one quarter to a half inch from the rear of the LED. Make sure you the LED doesn’t get too hot. Snip off any excess cathode lead length. Don’t connect anything to the anode yet.
  • Page 29 according to the first part of this procedure. As with everything so far, the unoccupied terminal of each switch will be connected to the boards later in this document. As a reminder, don’t get the switches too hot! Like a soldering iron ninja, get in there and get out.
  • Page 30 Table 4-1: Digital Ground Strap Connection List Component Pattern LED 1 Cathode Pattern LED 2 Cathode Pattern LED 3 Cathode Pattern LED 4 Cathode Pattern LED 5 Cathode Pattern LED 6 Cathode Pattern LED 7 Cathode Pattern LED 8 Cathode Pattern LED 9 Cathode Pattern LED 10 Cathode Pattern LED 11 Cathode...
  • Page 31 Component Bus 3 Merge Switch, one lug connected 8X2/16X1 Switch, one lug connected Random/Pattern Switch, one lug connected Manual Step Switch, one lug connected Manual Load Switch, one lug connected Random Reference Pot, Rightmost Lug (looking from back) connected Random Level Pot, Rightmost Lug (looking from back) connected Master Gate Output Jack, Ground Lug Connected (for non-banana jack) Master Trigger Output Jack, Ground Lug Connected (for non-banana jack) Bus 1 Gate Output Jack, Ground Lug Connected (for non-banana jack)
  • Page 32 Analog Ground Strap Connection Procedure o Programming Pots 1 through 16 Connect the ground lugs of the sixteen programming pots together. Remember, as always, looking from the back of the pot, the ground will connect to the rightmost lug. This is assuming, of course, you are using rotary pots. If your choice of pot is a slider, identify the ground lugs of the sliders and connect those all together.
  • Page 33 Using insulated wire, connect all the scattered components that require Analog Ground connections have their Analog Ground points tied together. After you’ve done that, as was done with the Digital Ground strapping, it’s time to ensure that all of the Analog Ground points are tied together on the panel.
  • Page 34 Gate Bus Strap Connection Procedure This is where the rubber hits the road in making sure you have your orientation straight on the SPDT ON-OFF-ON switches. There are two gate bus common connections – Bus 1 is the signal that sends the gate signals to, surprisingly enough, Gate Bus 1, and Bus 3 is the signal that sends the gate signals to, well, Bus 3.
  • Page 35 o Common Connection to Bus 1 – The Bus 1 Load Switch The Bus 1 load Switch is a SPST ON-OFF switch, so you don’t have to worry about which lug to connect the Bus 1 signal to. Once more, you should have worked out by now that you have it oriented in the correct position to jibe with your front panel legend –...
  • Page 36 Various and Sundry Strap Connections You’re getting very close to the end of the panel strapping process, so hang in there. The next set of connections consists of a few “single” connections – lines to connect jacks to pots and switches, mainly. Also, some of the optional Variable Range Option connections will be discussed, should you have decided to include that option.
  • Page 37 SW39 Clock Signal Clock Enable Input SPST ON-OFF Ground Figure 4-11: Wiring the Clock Input Jack to the Clock Enable Switch o Glide Pot Bits and Pieces The three glide pots are not strapped to anything; their inputs and outputs come from and go straight to the Analogue Board.
  • Page 38 Glide B Glide A+B Glide A 1M Linear 1M Linear 1M Linear Back Back Back Figure 4-12: Wiring the Unused Lug to the Center Tap of the Glide Pots From this point on, the steps listed are for optional installments only. They’re optional mainly because the “standard”...
  • Page 39 External Variable Range function. All of these options are found on page 9 of the front panel/interconnect schematic. They all require the addition of an External Range Input jack, which is also mentioned in the Analog Ground Strap section. One of them (Option 4) requires an extra switch, which has yet to be mentioned.
  • Page 40 Ext. Range Variable Range Signal Control Input Back n.c. Switch Ground Figure 4-15: Connecting External Range Input Jack to Variable Range Pot (Opt. 3) o Var. Range Option 4: Manually Switched Internal/External Variable Range Now it’s time for the banana jackers to regain the field. This option uses an extra switch (Switch 44, a SPDT ON-ON switch like the Invert B switch) to provide essentially the same functionality of Option 3 above.
  • Page 41 Up Position of Switch Selects External Range Signal SW44 Ext/Int. Range Ext. Range Variable Range Select Signal Control SPDT ON-ON Input Back Ground Down Position of Switch Selects External Range Signal SW44 Ext/Int. Range Ext. Range Variable Range Signal Select Control SPDT ON-ON Input...

  • Page 42: Chapter 5: Building The Cables

    Again, it cannot be stressed enough that using this system provides a number of advantages: (1) Final Assembly of the Klee Sequencer is made much easier. If one is to hardwire the connections, the wires must be soldered to both the front panel and the PCB assemblies.
  • Page 43 There are slots on Key Tab the back of the housing Crimp Terminal Housing as viewed from the "top" or the side the wires are inserted Figure 5-1: Housing and Crimp Terminal – A Graphic Anatomy On the opposite side of the housing is a slot for each “hole” or terminal in the housing. These slots run along the bottom.
  • Page 44 Crimp or fold the tabs of the crimp terminal over here. If using solder, solder here. Be sure not to put on too much solder so the crimp terminal can fit into the housing. Don't bend the loop or the little anchor tab that juts out on the backside of the crimp terminal.
  • Page 45 A little care at these early stages can save a lot of headache at the final assembly and test stage of building the Klee Sequencer. The tab on the crimp terminal must be inserted into the...
  • Page 46 View From Backside Insert the crimp terminal into the housing so that a soft "click" is felt. Figure 5-4: Inserting Crimp Terminals Into the Housing Remember that “loop” on the terminal must not be crushed or misshapen – it is intended to compress down over the wire, making a good connection, and also provides a certain amount of tension that helps hold the terminal in the housing.
  • Page 47 Figure 5-5: Assembled Cables Once you’ve got all the wires into the housing, you can put a small collar onto the wires just above the housing. You may not want to add more at this time, because your wires will need to “fan out” in order to connect the all the disparate points they will connect to. Once you’ve built your cables, you will find that soldering them to your strap-wired panel is a real cinch –...
  • Page 48 Table 5-1: Eight Wire Panel Cables Plug/Cable Number Pin Number/Panel Connections P102 Pin1 - External Load Jack (J312)* Pin2 - Clock Enable Switch (SW339) Pin3 - Manual Load Switch (SW338) Pin4 - Random Reference LED (D322) Anode Pin5 - Center Tap Reference Level Pot (R317) Pin6 - Center Tap Random Input Level Pot (R318) Pin7 - 8X2/16X1 Switch (SW340) Pin8 - Random/Pattern Switch (SW341)
  • Page 49 Plug/Cable Number Pin Number/Panel Connections P109 Pin1 - Pattern LED 16 (D316) Anode Pin2 - Pattern LED 15 (D315) Anode Pin3 - Pattern LED 14 (D314) Anode Pin4 - Pattern LED 13 (D313) Anode Pin5 - Pattern LED 12 (D312) Anode Pin6 - Pattern LED 11 (D311) Anode Pin7 - Pattern LED 10 (D310) Anode Pin8 - Pattern LED 9 (D309) Anode...
  • Page 50 Plug/Cable Number Pin Number/Panel Connections P207 Pin1 - Programming Pot 8 (R308) Center Pin2 - Programming Pot 7 (R307) Center Pin3 - Programming Pot 6 (R306) Center Pin4 - Programming Pot 5 (R305) Center Pin5 - Programming Pot 4 (R304) Center Pin6 - Programming Pot 3 (R303) Center Pin7 - Programming Pot 2 (R302) Center Pin8 - Programming Pot 1 (R301) Center...
  • Page 51 Table 5-2: Six Wire Panel Cables Plug/Cable Number Pin Number/Panel Connections P110 Pin1 - Gate Bus 2 Trigger Jack (J301) Tip Lug Pin2 - Gate Bus 2 LED (D318) Anode Pin3 - Gate Bus 2 Gate Jack (J303) Tip Lug Pin4 - Gate Bus 1 Trigger Jack (J302) Tip Lug Pin5 - Gate Bus 1 LED (D317) Anode Pin6 - Gate Bus 1 Gate Jack (J301) Tip Lug...
  • Page 52 Power Supply and Board Interconnect Cables While you’re at it, this is the perfect opportunity to build the remaining cables – the cables used to connect the electro-music Klee PCBs together and the cable required to connect to the power supply itself.
  • Page 53 Figure 5-5: Board Interconnect Cable Assemblies A bit of care should be taken when applying the housings to the PCB interconnect assemblies – make sure you don’t get caught up in putting the housings on backwards or anything like that. Not that it’s ever happened, you understand. But it could. It really could.
  • Page 54 Plug/Cable Number Pin Number/Panel Connections P107-P204 Pin1 - Register B Bit 8 Pin2 - Register B Bit 7 Pin3 - Register B Bit 6 Pin4 - Register B Bit 5 Pin5 - Register B Bit 4 Pin6 - Register B Bit 3 Pin7 - Register B Bit 2 Pin8 - Register B Bit 1 Table 5-7: Two Wire Board Interconnect Cables...

  • Page 55: Chapter 6: Installing The Panel/Pcb Wiring

    The Final Panel Assembly Step This chapter of the electro-music Klee Sequencer Build Instruction finishes up all of the major panel work, which, as mentioned before, is where the real work in building the Klee Sequencer truly is. For Those Not Using the Plugs and Headers...
  • Page 56 At this point, all of your cables will be housings that have an amount of wire attached to them. Hopefully you left enough length in the wires to “reach” from between the panel to where the boards will be situated. Before you solder each cable onto the panel, stretch the wires between the board locations and the panel components they will solder to.
  • Page 57 SW24 SW23 SW22 SW21 SW20 SW19 SW18 SW17 Stage 8 Stage 7 Stage 6 Stage 5 Stage 4 Stage 3 Stage 2 Stage 1 SPDT SPDT SPDT SPDT SPDT SPDT SPDT SPDT ON-OFF-ON ON-OFF-ON ON-OFF-ON ON-OFF-ON ON-OFF-ON ON-OFF-ON ON-OFF-ON ON-OFF-ON 1 2 3 4 5 6 7 8 P201 Analogue Board J1...
  • Page 58 Stage 8 Stage 7 Stage 6 Stage 5 Stage 4 Stage 3 Stage 2 Stage 1 SPST ON-OFF SPST ON-OFF SPST ON-OFF SPST ON-OFF SPST ON-OFF SPST ON-OFF SPST ON-OFF SPST ON-OFF 1 2 3 4 5 6 7 8 P104 Digital Board J4 Figure 6-3: P104 Pattern Switch Connections...
  • Page 59 Stage 8 Stage 7 Stage 6 Stage 5 Stage 4 Stage 3 Stage 2 Stage 1 50K Linear 50K Linear 50K Linear 50K Linear 50K Linear 50K Linear 50K Linear 50K Linear Back Back Back Back Back Back Back Back 1 2 3 4 5 6 7 8 P205 Analogue Board J5...
  • Page 60 Stage 8 Stage 7 Stage 6 Stage 5 Stage 4 Stage 3 Stage 2 Stage 1 50K Linear 50K Linear 50K Linear 50K Linear 50K Linear 50K Linear 50K Linear 50K Linear Back Back Back Back Back Back Back Back 1 2 3 4 5 6 7 8 P207 Analogue Board J7...
  • Page 61 Stage 8 Stage 7 Stage 6 Stage 5 Stage 4 Stage 3 Stage 2 Stage 1 Red LED Red LED Red LED Red LED Red LED Red LED Red LED Red LED Anode Anode Anode Anode Anode Anode Anode Anode Cathode Cathode Cathode...
  • Page 62 Standard Configuration External Random SW38 Clock Input SW40 SW41 Load Reference Manual Load 8X2/16X1 Random/Pattern Red LED SPST (ON)-OFF Reference Level Random Level SPST ON-OFF SPST ON-OFF 100K Linear 100K Linear Anode Back Back Ground Ground Cathode 1 2 3 4 5 6 7 8 P102 Digital Board J2 External Load Enable Switch Option Installed...
  • Page 63 SW43 Range Select SP8T Rotary 1 2 3 4 5 6 7 8 P209 Analogue Board J9 Figure 6-12: P209 Rotary Switch Connections Rotary Switch Notes The rotary Range Select Switch wiring diagram most likely does not reflect the choice you have made for your rotary switch.
  • Page 64 Gate Bus Switches SW32 SW31 SW30 SW29 SW28 SW27 SW26 SW25 SW24 SW23 SW22 SW21 SW20 SW19 SW18 SW17 Stage 16 Stage 15 Stage 14 Stage 13 Stage 12 Stage 11 Stage 10 Stage 9 Stage 8 Stage 7 Stage 6 Stage 5 Stage 4 Stage 3...
  • Page 65 Gate Bus 2 Gate Bus 2 Gate Bus 1 Gate Bus 2 Gate Bus 1 Gate Bus 1 Trigger Trigger Gate Gate Red LED Red LED Anode Anode Ground Ground Ground Ground Cathode Cathode 1 2 3 4 5 6 P110 Digital Board J10 Figure 6-14: P110 Connections...
  • Page 66 Glide B Glide A Glide A+B 1M Linear 1M Linear 1M Linear Back Back Back 1 2 3 4 5 6 P212 Analogue Board J12 Figure 6-16: P212 Connections Optional A+B Output A Output B Optional B Output A+B Optional A Ground Ground Ground...
  • Page 67 Switch Lever Up: Switch Lever Up: Invert B Mode On Invert B Mode Off SW42 SW42 Invert B Invert B SPDT SPDT ON-ON ON-ON 1 2 3 1 2 3 P112 P112 Digital Board J12 Digital Board J12 Figure 6-18: P112 Connections Reference Level 100K Linear Back...
  • Page 68 The Digital Ground connection from P113 should connect to a single point on the Digital Ground system installed during the front panel strap wiring process. Ideally, a central point of connection would be a good place to connect the wire. For example, perhaps on the Digital Ground line connecting the pattern switches or pattern LEDs together.
  • Page 69 Internal Variable Range Option External Variable Range Option (Option 1) (Option 2) Variable Range Variable Range 100K Linear 100K Linear Back Back P216 P216 Analogue Board J16 Analogue Board J16 Auto-Switching Manually Switched Internal/External Variable Range Internal/External Variable Range Option Option (Option 3) (Option 4)
  • Page 70 P216, of course, is only used if one of the Variable Range options is installed. The connections shown here assume the strap wiring is finished for the option already. For example, Option 3 assumes the tip lug of J18 is already connected to the top of R17. Option 4 assumes the center lug (pole) of SW44 is connected to the top of R17, etc.

  • Page 71: Chapter 7: Building The Boards

    Klee Sequencer. Before you start slapping parts on them and jamming solder onto the leads, you should first read at least this first section so that you know which parts you want to slap onto the boards and jam solder onto the leads.
  • Page 72 Figure 7-1: The electro-music Klee Sequencer Digital Board...
  • Page 73 Steps to Soldering Parts to the Digital PCB Grab the Digital PCB and get ready to begin soldering. You can tell which PCB is the Digital PCB, because it has “Digital” silk-screened upon it. How ‘bout that? Headers The best place to begin is by soldering the header connectors to the boards (if you plan to use the connectors that is –...
  • Page 74 8 Pin Headers Quantity Designators Done J2-J9 6 Pin Headers Quantity Designators Done J10-J11 3 Pin Headers Quantity Designators Done 2 Pin Headers Quantity Designators Done J1, J13 IC Sockets Once all of the header connectors are installed, go ahead and put in the IC sockets. Again, make sure they sit flat and level on the surface of the PCB.
  • Page 75 24 Pin IC Sockets Quantity Designators Width Done X6, X7 0.6” 16 Pin IC Sockets Quantity Designators Width Done 0.3” 14 Pin IC Sockets Quantity Designators Width Done X2-X5, X10-X15 0.3” 8 Pin IC Sockets Quantity Designators Width Done X1, X8 0.3”...
  • Page 76 Five Volt Gates and Triggers: R63 through R70 = 3K R71 through R78 = 1K5 10 Volt Gates and Triggers: R63 through R70 = 1K5 R71 through R78 = 3K Figure 7-3: Standard Gate Bus Resistor Locations and Values The Gate Bus Resistors are shown in 7-3, along with a few landmark transistors, ICs and capacitors.
  • Page 77 If you are operating from 12V supply rails, then a value of 2K for R63 – R70 and 2K for R71 – R78 will produce 5V levels. This will provide a 1K output impedance. For 12V operation, a value of 1K for R63 – R70 and eliminating (not installing) R71 – R78 will produce 10V level signals with an output impedance of 1K.
  • Page 78 220K Resistors Quantity Designators Done R27 – R28 5%, 1/4W 270K Resistors Quantity Designators Done 5%, 1/4W 4K7 Resistors Quantity Designators Done R31, R48, R85 – R88 5%, 1/4W 6K8 Resistors Quantity Designators Done R32-R47 5%, 1/4W Diodes After the resistors are installed, move on to the diodes. There are only six diodes on the Digital Board, and they’re all of the same type (1N4148), so it’s not a terribly large job.
  • Page 79 Electrolytic, 25V Transistors Only one type of transistor is used throughout the Klee Sequencer – the 2N3904 NPN transistor, and they’re all located on the Digital Board. These transistors are used to drive the clock, reference and gate bus LEDs. There are six of these transistors. The silk screening serves as the guide to correct orientation of the transistors.
  • Page 80 Digital Board Integrated Circuits Quantity Designators Type Done U1, U8 LM358 Dual Op Amp U2, U10 – U11 CD40106 Hex Schmitt Trigger CD4071 Quad 2 Input OR Gate U4, U12 – U13 CD4093 Quad 2 Input NAND Schmitt Trigger CD4013 Dual D Flip Flop U6 –...
  • Page 81 Figure 7-5: The electro-music Klee Sequencer Analogue Board...
  • Page 82 Steps to Soldering Parts to the Analogue PCB Of course, the electro-music Klee Sequencer Analogue PCB is the one marked “Analogue” in the silkscreen. Before you start soldering parts to it, there are a few things to go over. Please read through this section before beginning.
  • Page 83 If you do not intend to install any of the Variable Range options, then you will want to follow the notes of Figure 7-7. Note that trim pot R41 is installed (it is not installed if a variable range option is to be installed). W2 is installed, but J16 is not required. Though it is not shown, D30 is not required either.
  • Page 84 The maximum range of the Variable Range Control is determined by R33. In other words, with the Variable Range Control maxed out at full clockwise, R33 will determine what that maximum voltage will be. So, consideration must be given to what value will be used for R33.
  • Page 85 This, at best is a subjective arrangement – you, as the owner and operator of your Klee Sequencer, are the final arbiter of what could be considered “musically useful”. However, before you have a chance to try the intervals, the Klee must be at first built, so trying to determine what is useful to you is much like putting the cart before the horse.
  • Page 86 value, that can be trimmed “down” to some other value. If you’re using position 8 as a variable value, you may wish to have some other range as a higher value to compensate. This is due to the fact that you may wish to have a very low value or a “mid” value as your maximum variable range.
  • Page 87 Range Switch Position Maximum Pot Range Voltage/Interval (V/Oct) 0.333V, Major 3 Interval 0.4167V, Perfect 4 Interval 0.583V, Perfect 5 Interval 0.666V, Minor 6 Interval 1V, One Octave 2V, Two Octaves 5V, Five Octaves 4V, Four Octaves, Variable Table 7-3: A Suggested Range Selection Using the Internal Variable Range Option This arrangement provides a wide range for position 8, yet provides enough resolution that fairly precise intervals can be set using the Variable Range Control pot.
  • Page 88 Jumpers The jumpers can be installed using bus wire, or even excess resistor lead. Remember to only install the jumpers if needed! Jumpers Quantity Designators Done W1 – Install if power supply has only one ground lead. W2 – Install if fixed range is to be used for Range Switch Position 8 Connectors When installing the header connectors, use the same techniques used on the Digital Board –...
  • Page 89 14 Pin IC Sockets Quantity Designators Width Done X1 – X4, X8 – X10 0.3” 8 Pin IC Sockets Quantity Designators Width Done 0.3” Resistors This checklist will list the original values of all resistors. Bear in mind that you may or may not wish to use the same values for R26 through R33.
  • Page 90 4M7 Resistors Quantity Designators Done R44 – R45 5%, 1/4W 68K Resistors Quantity Designators Done 5%, 1/4W Diodes There are three varieties of diodes to deal with on the Analogue Board. The 1N4148 diodes could be substituted with 1N914 diodes. The 1N4001 could be substituted by any other high power rectifier diode (such as 1N4002, etc).
  • Page 91 Polarized 10 uF Capacitor Quantity Designators Type Done C19 – C20 Electrolytic, 25V Polarized 4.7 uF Capacitor Quantity Designators Type Done C10 - C12 Electrolytic, 25V Multi-Turn Trim Pots There are six 10K trim pots that are used for calibration of the Range Switch voltages. Remember, if you are installing any of the variable range options, do not install R41.
  • Page 92 Analogue Board Socketed Integrated Circuits Quantity Designators Type Done U1-U4 CD4066 Quad Analog Bi-Lateral Switch TL072 Dual Op Amp CD4051 1 of 8 Analog Mux U8 – U10 TL074 Quad Op Amp Figure 7-11: Analogue Board IC Placement Guide...

  • Page 93: Chapter 8: Final Assembly Of The Electro-Music Klee Sequencer

    8. Final Assembly of the electro-music Klee Sequencer Putting It All Together You’ve completed your front panel and the PCBs are all soldered up. Hopefully your power supply is all ready to go, and you’ve either got the chassis or at least a good test set-up going on there.
  • Page 94 Stop what you’re doing and trace down where the short is occurring, using your years of trouble-shooting Klee Sequencer Digital Board experience. If, however, you do not have the power rail shorted to ground, this is a good thing. Your power supply won’t explode or blow a fuse when it is ultimately connected to your...
  • Page 95 Check the IC Ground Pins Connect the negative lead of the DMM connected to pin 2 of J1 and begin checking the ground pins of each IC with the positive lead. You should read zero ohms on your DMM for each pin, or very, very close to it. Ref Des Device Ground Pin...
  • Page 96 Connect the negative lead of the ohmmeter to pin 4 of J10 (-V). This should also read at minimum of a few hundred ohms. If it doesn’t read 0 Ohms, then your power supply rails are not shorted together. If you get a reading of 0 or 1 or 2 Ohms in any of these checks –...
  • Page 97 Check the IC Negative Power Pins Here’s something you didn’t have to do with the Digital Board – check the IC negative supply pins. Not all of the ICs require negative supplies, but Table 8-4 contains a list of all that do. Connect the positive ohmmeter lead to pin 4 of J10 and check the pins in Table 8-4.
  • Page 98 Figure 8-1: Board Interconnection Connect the Front Panel to the Boards This is the step where you thank yourself profusely for labeling the connectors attached to the front panel – now you need to connect them to the boards. If you didn’t label them, well, you’ve got your work cut out for you.

  • Page 99: Chapter 9: Electro-Music Klee Sequencer Bring-Up Procedure

    Klee Sequencer Bring-Up Procedure Goals of the Bring-Up Procedure The bring up procedure is used to determine if your Klee Sequencer does not produce any smoke it’s not intended to produce, does not produce any lights it’s not intended to produce, and all the controls, indicators and jacks function as they are intended to function.
  • Page 100 LEDs associated with the pattern switches that are set to “1” or “ON” should illuminate. LEDs associated with the pattern switches that are set to OFF or “0” should not illuminate. Try this with various combinations of pattern switch settings. •...
  • Page 101 Testing the Clock and Shift Register Circuits – 8X2 Mode Continuing from the previous procedure: • Press the Manual Load Switch. The Stage 1 Pattern LED should illuminate, and all other pattern LEDs should remain off. • Set the 8X2/16X1 Switch to 8X2. •...
  • Page 102 Testing the Manual Step Function Continuing from the previous procedure: • Set Clock Enable to OFF. The LEDs should “freeze”. • Set Invert B to OFF. • Set Pattern Switch 1 to ON or “1”. • Set Pattern Switch 9 to OFF or “0”. •...
  • Page 103 • Set the Merge 2 Switch to OFF. • Set Clock Enable to OFF. • Set all of the Gate Bus Switches to Gate Bus 1. • Set Clock Enable to ON. The Master Gate Bus LED should flash with each clock pulse. The Gate Bus 1 LED should flash with each clock pulse.
  • Page 104 Testing the External Load function Continuing from the previous procedure: • Connect a second LFO to the External Load Input Jack. • If installed, set the External Load Enable Switch to ON. • Set the LFO connected to the External Load Input Jack to a fairly low frequency. Observe the LEDs –...
  • Page 105 • Turn the Random Reference Level Control anti-clockwise until the Random Reference LED just begins to flash. • Slowly turn the Random Signal Level anti-clockwise. At some point, the Random Reference LED should stop flashing. • Set the Random/Pattern Switch to PATTERN. •...
  • Page 106 Gate Bus 1 Continuing from the previous procedure: • Set a number of Gate Bus Switches to Gate Bus 1, so that the Gate Bus 1 LED flashes frequently. • If an oscilloscope is available, connect the oscilloscope to the Gate Bus 1 Trigger Output.
  • Page 107 A pulse signal should be high at the selected gate bus voltage for as long as the Gate Bus 2 LED remains on (for as long as the clock LFO is high). • If an oscilloscope is not available, connect a gate-able device to the Gate Bus 2 Gate Output.
  • Page 108 Testing the Voltage Outputs A+B Output, Glide A+B Control Though the Klee is not calibrated yet, it should still provide a high enough voltage in order to check the functionality of the voltage generation and mixing circuitry. Continuing from the previous procedure: •...
  • Page 109 A Output, Glide A Control Continuing from the previous procedure: • Disconnect the VCO from the A+B Output Jack and connect it to the A Output Jack. As the LEDs step the single bit through stages 1 through 8, the pitch of the VCO should stay a constant high.
  • Page 110 Testing the Optional Internal Variable Range Control Obviously, if you have not installed the Optional Internal Variable Range Option, you don’t have to worry about this procedure. Continuing from the previous procedure: • Set the programming pots so that each produces a pitch variation – or rather, just don’t have them sitting full anti-clockwise.

  • Page 111: Chapter 10: Calibrating The Electro-Music Klee Sequencer

    The zero calibration helps to eliminate excessive DC offset on the voltage outputs of the electro-music Klee Sequencer. It does not totally eliminate offsets – there will be some minimal offset on each of these outputs even after this calibration, due to the mixing stages after this section, so don’t let that worry you as to whether you’ve calibrated this...
  • Page 112 Calibration Set Up • Set the Clock Enable Switch to OFF (IE, don’t clock the Klee during the calibration). • Set all programming pots to full anti-clockwise. • Set the Range Switch to position 1. • Clip the negative (ground) lead of the DVM to analog ground. A good place to connect it would be somewhere on the analog ground system of the panel –...
  • Page 113 Adjust for 0V at Pin1 of U9 Adjust R43 Figure 10-2: Register A Offset Zero Calibration Register B Voltage Offset Zero Trim • Touch the tip of the positive DVM lead to pin 1 of U9. • While observing the DVM, adjust R43 for 0V on the DVM. Get as close to absolutely zero volts as possible.
  • Page 114 R38, Range 5, R34, Range 1, 0.333V R39, Range 6, R35, Range 2, 0.416V R40, R36, Range 3, 0.583V Range 7, 4V Trim R41, R37, Range 4, Range 8, 0.666V 8V Trim Measure voltages at Pin 1 of U8 Figure 10-3: Range Switch Voltage Calibration Points •...

  • Page 115: Appendix A: Analogue Board Bill Of Material

    Appendix A: Analogue Board Bill of Material Resistors Value Quantity Designators Tolerance 100R R49 – R57 5%, 1/4W 5%, 1/4W R30 – R32 1%, 1/4W 100K R1 – R25 0.1%, 1/8W 150K R26 – R28 1%, 1/4W 1%, 1/4W R46 – R48 5%, 1/4W R44 –...
  • Page 116 Header Connectors Number of Pins Quantity Designators Description J1-J9 Sip Header, 0.1” Center J12-J13 Sip Header, 0.1” Center Sip Header, 0.1” Center 2 (3*) J11, J15,*J16 Sip Header, 0.1” Center (*J16 for Optional Variable Range) electro-music Klee Sequencer Analogue PCB...

  • Page 117: Appendix B: Digital Board Bill Of Material

    Appendix B: Digital Board Bill of Material Resistors Value Quantity Designators Tolerance 100K R23 – R26, R30, 1%, 1/4W R49, R52 – R62, R81 – R84, R89, R90, R94 R29, R79 1%, 1/4W R71 – R78 5%, 1/4W R92, R93 5%, 1/4W R1 –...
  • Page 118 0.3” 8 Pin DIP X1, X8 0.3” Header Connectors Number of Pins Quantity Designators Description J2-J9 Sip Header, 0.1” Center J10-J11 Sip Header, 0.1” Center Sip Header, 0.1” Center J1, J13 Sip Header, 0.1” Center electro-music Klee Sequencer Digital PCB...

  • Page 119: Appendix C: Front Panel And Wiring Bill Of Material

    Appendix C: Front Panel and Wiring Bill of Material Switches Type Quantity Designators Description Toggle SW1-SW16, SPST ON-OFF SW33-SW36, SW39 – SW41, SW45* Toggle SW17 – SW32 SPDT ON-OFF-ON Toggle SW43, SW44* SPDT ON-ON Pushbutton SW37 – SW38 SPST (ON)-OFF Rotary SW43 SP8T...
  • Page 120 Connector Housings Type Quantity Designators Description 8 Pin P102-P106, Connector Housing 8 Pos P107-P109, P201-P202, P203 -P209 6 Pin P110-P111, Connector Housing 6 Pos P212-P213 4 Pin P210 Connector Housing 4 Pos 3 Pin P112 Connector Housing 3 Pos 2 Pin P101, P113, P211, Connector Housing 2 Pos P215, P216*,...

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