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BYOC Analog Chorus Instructions Manual

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Build Your Own Clone
Analog Chorus
Kit Rev 1.0 Instructions
Warranty:
BYOC, LLC guarantees that your kit will be complete and that all parts and components
will arrive as described, functioning and free of defect. Soldering, clipping, cutting,
stripping, or using any of the components in any way voids this guarantee. BYOC, LLC
guarantees that the instructions for your kit will be free of any majors errors that would
cause you to permanently damage any components in your kit, but does not guarantee
that the instructions will be free of typos or minor errors. BYOC, LLC does not
warranty the completed pedal as a whole functioning unit nor do we warranty any of the
individual parts once they have been used. If you have a component that is used, but
feel it was defective prior to you using it, we reserve the right to determine whether or
not the component was faulty upon arrival. Please direct all warranty issues to:
sales@buildyourownclone.com This would include any missing parts issues.
Return:
BYOC, LLC accepts returns and exchanges on all products for any reason, as long as
they are unused. We do not accept partial kit returns. Returns and exchanges are for the
full purchase price less the cost of shipping and/or any promotional pricing. Return
shipping is the customers responsiblity. This responsibility not only includes the cost of
shipping, but accountability of deliver as well. Please contact
sales@buildyourownclone.com to receieve a return authorization before mailing.
Tech Support:
BYOC, LLC makes no promises or guarantees that you will sucessfully complete your kit
in a satisfactory mannor. Nor does BYOC, LLC promise or guarantee that you will
receive any technical support. Purchasing a product from BYOC, LLC does not entitle
you to any amount of technical support. BYOC, LLC does not promise or guarantee that

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Summary of Contents for BYOC Analog Chorus

  • Page 1 Kit Rev 1.0 Instructions Warranty: BYOC, LLC guarantees that your kit will be complete and that all parts and components will arrive as described, functioning and free of defect. Soldering, clipping, cutting, stripping, or using any of the components in any way voids this guarantee. BYOC, LLC...

  • Page 2: Revision Notes

    That being said, we will do our best to help you as much as we can. Our philosophy at BYOC is that we will help you only as much as you are willing to help yourself. We have a wonderful and friendly DIY discussion forum with an entire section devoted to the technical support and modifications of BYOC kits.
  • Page 3 ANALOG CHORUS KIT Rev 1.0 INSTRUCTION INDEX Parts Checklist ....page 4 - 5 Populating the Circuit Board ....page 6 - 16 Main PCB Assembly .........page 17 - 19 Wiring.................page 20 - 23 Installing the ICs............page 24 Operation Overview..........page 25 Schematic..............page 26 - 27...
  • Page 4 Parts Checklist for BYOC Analog Chorus Rev 1.0 Resistors: 1 - 47R (yellow/purple/black/gold/brown) 1 - 470R (yellow/purple/black/black/brown) 1 - 2k7 (red/purple/black/brown/brown) 4 - 4k7 (yellow/purple/black/brown/brown) 14 - 10k (brown/black/black/red/brown) 1 - 22k (red/red/black/black/red/brown) [used only for bass mods] 4 - 33k (orange/orange/black/red/brown)
  • Page 5 4 - DIP 8 socket Transistors: 4 - 2N5088 Hardware: 1 - drilled enclosure w/ 4 screws 1 - byoc Analog Chorus PCB 1 - 3PDT footswitch 2 - knobs 1 - AC adaptor jack 1 - ¼ mono jack 1 - ¼...

  • Page 6: Populating The Circuit Board

    Populating the Circuit Board...
  • Page 7 STEP 1: Add the diodes. Be sure to matched the end of the diode with the stripe to the layout on the PCB. The stripped end should go in the square solder pad. Note that the 1N4001 diode goes in the space highlighted in yellow. The two small orange 1N4148 diodes go in the space highlighted in red.
  • Page 8 STEP 2: Add the resistors . Resistors are not polarized, so it does not matter which end goes in which solder pad. Be careful of the 47ohm(labelled 47R on the PCB) and 470ohm (labelled 470R on the PCB) resistors. Don't confuse them with the 4k7, or 47k resistors. BASS MOD: The 33k resistors highlighted in green and yellow are the resistors you would want to change if you are building this for bass guitar.
  • Page 9 Step3: Add the 8 pin sockets. Line up each socket so that the u-shaped notch matches up with the end that has a notch on the layout. Only add the socket. DO NOT solder the actual chip to the PCB. DO NOT solder the chip to the socket. Only the socket gets soldered.
  • Page 10 Step 4: Add the transistors and voltage regulator. Insert these components into the PCB so that the flat side of the component matches up with the flat side of the PCB layout. Be sure not to mix up the 2N5088's with the 2N5087.
  • Page 11 STEP 5: Add the film capacitors. These are not polarized so they can be inserted into the PCB in either direction. BASS MOD: Use a .01uf (10n) cap in the space for the 33n cap highlighted in yellow. This will cause one of the high pass filters to cut more of the low frequencies out of the wet signal.
  • Page 12 Step 6: Add the trimpot. The trimpot only has 3 leads. The PCB has spaces for 5. This is so that the PCB can accept a variety of trimpot brands and models. There is only one way your trimpot will be able to fit into the PCB so do not let this confuse you. SETTING THE TRIMPOT: After you complete your chorus build, you will need to set the internal trimpot.
  • Page 13 Step 7: Add the ceramic disc capacitors. These will be the small round orange caps. These are not polarized and can be inserted into the PCB in either direction.
  • Page 14 STEP 8: Add the aluminum electrolytic capacitors. These are polarized. The positive end will have a longer lead and should go in the square solder pad. The negative end will have a shorter lead with a black strip running down the body of the capacitor.
  • Page 15 Step 9: Add the battery snap. Thread the solder ends of the battery snap into the strain relief holes from the bottom solderside of the PCB and out through the top. Insert the solder ends of the battery snap wires into the topside of their respective solder pads. Solder on the bottom side of the PCB.
  • Page 16 Step 10: Add wires to the IN, Ground, STEREO, and MONO eyelets. Start by cutting four 2.5 pieces of wire. Strip 1/4 off each end and tin the ends. Tinning means to apply some solder to the stripped ends of the wires. This keeps the strands from fraying and primes the wire for soldering.
  • Page 17 Assembly Step 1: Mount the DC adaptor jack to the enclosure. Step 2: Connect the TIP (negative terminal) of the DC adaptor jack to the eyelet on the PCB with 2 inches of hook up wire. Connect the SLEEVE (positive terminal) of the DC adaptor jack to the eyelet on the far right side of the PCB with 2 inches of hook up wire.
  • Page 18 Step 3: Flip the PCB over so that the bottom or solder side is up. Insert the two B100k(rate & depth) potentiometers, and the LED into the bottom side of the PCB. DO NOT SOLDER YET!!! The LED will have one lead that is longer than the other. The longer lead goes in the hole of the square solder pad.
  • Page 19 Step 4: Hold the PCB in one hand so that the component side of the PCB is in the palm of your hand and the bottom side with the pots, toggle switch and LED is facing up. Now use your other hand to guide the predrilled enclosure onto the PCB assembly so that the pots and LED all go into their respective holes.
  • Page 20 Wiring Step 1: Install the 1/4 jacks to the enclosure. Be sure to turn the OUT jack a 1/4 turn counter clockwise so that solder terminal for the tip does not short out against the enclosure. Step 2: Install the footswitch. Orient the footswitch so that the flat sides of the solder lugs are like the diagram below.
  • Page 21 degrees of each other. Either way is fine. It does not matter as long as the flat sides of the solder lugs are running horizontal, not vertical.
  • Page 22 Step 3: Connect the pre stripped and tinned wires to the 1/4 jacks. Step 4: · Cut 4 x 3/4 pieces of wire. Strip 1/8 off each end. These will be used to connect lugs/eyelets 1, 2, 7, & 8 ·...
  • Page 23 · Cut 3 x 2 pieces of wire. Strip 1/4 off each end. These will be used to connect the tip and sleeve of the IN jack and the tip of the OUT jack to the PCB. · Cut 1 x 1.5 peice of wire. Strip 1/4 off each end. This will be used to connect the ring of the IN jack to the ring eyelet on the PCB.
  • Page 24 Installing the IC's and Finishing Up Don't forget to adjust your trimpot. Then put the cover on the enclosure and apply the bumpers to the cover is you like to use them.

  • Page 25: Operating Overview

    Operating Overview DEPTH: Sometimes called Width or Intensity. Controls hwo deep the vibrato of the chorus bends pitch. RATE: Sometimes called Speed or Frequency. Controls how fast the vibrato of the chorus bends pitch up and down. DC power supply - Use a 2.5mm negative tip 9VDC adaptor (this is your standard guitar fx style adaptor).
  • Page 26 Go to the next page for low res schematic. Click here or go to www.buildyourownclone.com/chorusschematic.pdf for hi res schematic.
  • Page 28 MODIFICATIONS Wet/Dry Mix and Volume: This was explained briefly in the bass mod in Step 2 of Populating the Circuit Board. The 33k resistor highlighted in green controls the amount of wet signal level mixing into the output buffer. The 33k resistor controls the amount of dry signal level mixing into the output buffer.
  • Page 29 Delay Time: The 47p cap and 150k resistor highlighed in red control the delay time. Increasing the value of either of these components will increase the delay time. Possible mods would be putting several capacitor values on a switch or replacing the 150k resistor with a B500k potentiometer.
  • Page 30 Please visit http://buildyourownclone.com/board for any technical support copyright © 2010 BYOC, LLC...