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TubeOhm Jeannie Manual

Polyphoner synthesizer
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TubeOhm Instruments
in cooperation with Rolf Degen
present:
Jeannie
polyphoner Synthesizer
the electronic part
DIY Manual V 1.06 / 05.08.22
TubeOhm 2021
1

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Summary of Contents for TubeOhm Jeannie

  • Page 1 TubeOhm Instruments in cooperation with Rolf Degen present: Jeannie polyphoner Synthesizer the electronic part DIY Manual V 1.06 / 05.08.22 TubeOhm 2021...
  • Page 2 Changes in V 1.06 : bugfix in the DIY manual To build Jeannie we need some basic parts First of all, the PCM 5102A AD converter is ready build on a circuit board. This is included in the full kit and tested.
  • Page 3 The most important element is of course the Teensy 4.1, which is available from various distributors such as Reichelt. A heat sink is glued to the Teensy and the USB 5 volt - described below - is changed. The two pin headers are soldered in from below.
  • Page 4 Eurocard and are even suitable for DIY. I ask all interested DIY'ers to read this manual at least once BEFORE you build Jeannie. Although it is relatively easy to build Jeannie, you should have some experience in soldering.
  • Page 5 And, to be honest, with a little practice, the components can be soldered without any problems. Even by hand. If you have ordered a board with soldered SMD ICs from TubeOhm, you can skip the next chapter 'Soldering the SMD components - procedure'. If not - please read on.
  • Page 6 Figure 3 Figure 3 shows how pin 1 on the IC is marked. Either: a:) by a dot or indentation b:) one side of the housing is slightly bevelled. The counting is from the left ,pin 1, to the right, pin 7 SO 14 or pin 8 SO 16. On the PCB, pin 1 of the ICs is marked, this with a dot and also with a symbolic bevel Soldering the SMD components-Procedure The connections pin 1 and pin 8 (SOIC 14) or pin 1 and pin 9 (SOIC 16) are tinned on the...
  • Page 7 Here is the front side of the board again Figure 5 Figure 6...
  • Page 8 And here is the back Figure 7 Figure 8...
  • Page 9 Now it's time for soldering. We start with IC 5 CD 4052. Attention: This IC MUST be a CMOS IC. Because this IC gets a supply voltage of +/- 8 volts. First we tin pin 8 on the board. Figure 9 Then the IC is aligned and soldered to the leg.
  • Page 10 Then the IC is straightened and pin 16 is soldered. Figure 11 Now the IC can be soldered completely. The connections of the IC are cleaned with a cotton swab and a cleaner and the solder pads are checked with a magnifying glass. Figure 12 The remaining ICs are soldered using the same procedure.
  • Page 11 Now it should look like this. Please clean the solder joints and look over them again with a magnifying glass. Figure 13 Once the SMD components are soldered, the most difficult part is done. Now we turn the board over and solder the complete power supply. We start with the TS 1117 3.3 Volt.
  • Page 12 3.3 Volt regulator soldered on . The soldered-on cooling fin serves for heat dissipation.. Figure 14 End of the SMD/SMT orgy. Building Jeannie with though hole components Please solder the diode 1N4001 right away otherwise it will be quite fiddly later.
  • Page 13 4x 3.3uH coils are soldered in the positions L1,L2,L3,L4 L1,2,3,4= Coil 3,3 uH or 4,7uH through hole Colorcode orange, orange,gold, silver=3,3 uH *** Serves for interference pulse yellow, purple, gold, silver=4,7 uH suppression Now solder the 9x 100 nF and the 10 pF capacitor. 9x100n , 1x 10 pF 9x 100 nF marked 104 -through hole...
  • Page 14 The next step is to solder in the IC sockets for ICs IC6 and IC 19. 2x8 pin IC sockets sockets for IC6 and IC 19 -through hole Attention, this part is marked -8V =79L08 and +8V=78L08 Voltage stabilisers 78L08,79L08 2 voltage Regulator -through hole IC 10=78L08 =+8V...
  • Page 15 electrolytic capacitors for the power supply 3x1uF,5x10uF,4x100uf, 1x Tantal 10uf C38,36,50= 1uF -through hole C11,14,45,46,54=10uF, -attention this parts are C18,19= 47uF polarized C8,10,38,51=100uF minus(-) is the short leg Ctant-9= 10uF tantal...
  • Page 16 Now we solder in the 5V switching regulator, the DC socket and 2 pin headers Attention, it has to be a switching regulator , a normal 7805 gets too hot ! K5 is used to connect a power switch and must be bridged K4 is later used for additional functions .
  • Page 17 So people, now turn the board over. First we build the complete MIDI circuit. For this we need : R110,R110,R36,R37,R38,D9 ,C49,C96 R37,38= 68R -through hole -blue,gray,black,gold,brown metalloxide , 1% R36=100R -through hole -brown,black,black,black,brown metalloxide , 1% R110=220R -through hole -red,red, black,black,brown metalloxide , 1% R111 -through hole...
  • Page 18 Now solder in the 4 resistors and 2 capacitors for the encoder. The resistors and capacitors are used for interference pulse suppression of the encoder. R20,21,23,26 and C16,20 R20,21,23,26 =10kohm -through hole metalloxide , 1% brown,black,black,red,brown C16,20 = 10nF = 100nF -through hole -marked 104 changings , take 100 nF for...
  • Page 19 Now it's time for resistors R5,7,8,10,25,41,42,44 and C48. R5,7,8,10,25,41,42,44 and C48 R41,42,44 =150 ohm -through hole metalloxide , 1% brown,green,black,black,brown R25=4,7 Kohm -through hole -yellow,purple,black,brown,brown metalloxide , 1% R5,7,8,10=3,3 Kohm -through hole -orange,orange,black,brown,brown metalloxide , 1% C48 = 100nF -through hole -marked 104...
  • Page 20 We install the resistors R6, 9, 11, 13,14,15,17,18, 24 R6,9,11,13,14,17,18,24 R17,18,24 =10 kohm -through hole metalloxide , 1% brown,black,black,red,brown R=9,15 =18 kohm -through hole -brown,gray,black,red,brown metalloxide , 1% R13,14= 39Kohm -through hole -orange,white,black,red,brown metalloxide , 1% R6,11=100R -through hole -brown,black,black,black,brown metalloxide , 1%...
  • Page 21 The capacitors C1,3,4,22,25,26,27,29,31,32,47 are soldered in. C1,3,4,22,25,26,27,29,31,32,47 C1,3,4,25,26,27,47=100nF -through hole marked 104 C22,29=33nF -through hole -marked 333 for the bass circut C31,32=100pF -through hole -marked 101...
  • Page 22 2 Elkos and the Transistor 2N3904 C9,15, T1 C9,C15 is 1uF or 4m7 uF C9,15=1uF or 4,7uF small -through hole ** for both caps you can take polarized, short leg is (-) also 1 uF !! minus *** max part high =8..9mm T1=2N3904 Transistor -through hole -marked 2N3904...
  • Page 23 Now we turn to R12,16,19,22,27,28,29,30,31,32,33,34,35, As well as C2,5,6,43 to Attention, R12,16,27,28,30,31,32 is the resistor matrix for the buttons. Please make sure that the correct resistors are installed. R12,16,22,27,28,30,31, 32,19,29 33,34,35 C2,5,6,43 R12,30 =10 kohm -through hole metalloxide , 1% brown,black,black,red,brown R28 =4,7 kohm -through hole...
  • Page 24 Attention, 2 buttons (depending on availability) can be used for the sequencer. One push- button without built-in LED or one push-button with built-in LED. *** R35: if the LED and the push button are connected in parallel, R35 should be 150 ohm. If no illuminated push button is used in the kit, please use R35= 220 ohm.
  • Page 25 Hurray, half the battle, the electronic components are all in. Now it's time for the mechanical components. We will now complete the lower side of the board. The following components are needed. Attention, board from the lower side !!! X3,X7 MIDI X3,X7 MIDI in /through -through hole MIDI connector...
  • Page 26 Attention, the socket strip for the DAC is only 5mm high. The DAC is a little lower so that the SD RAM card can be pulled out of the Teensy. Now the bottom side is ready. We solder the remaining components from above. Please turn the board over again.
  • Page 27 The LEDs are soldered in this position. Now the 4 jumpers are set and the voltages checked. Jumper K7 switches the second MIDI socket (x3) either to MIDI out or through . to MIDI . Currently Jeannie can only do MIDI through.
  • Page 28 Jumper K4 is an expansion port. In order for these inputs to have a defined potential all three jumpers should be set. Now the voltages are measured To do this, the IC LT1054 is plugged into the socket on the back of the board. The IC LT1054 is a charge pump and generates the voltage for the negative (-8 V) regulator.
  • Page 29 K5 - the connection for the power switch is bridged with a jumper. The ground can be taken from the audio output. *** or you can solder a grounding point (pinched off leg directly to the 12 volt plug). We have several Voltages gelb 3,3V grün =...
  • Page 30 Here is the position of the AD-converter. Here is the position of the AD-converter.
  • Page 31 This picture shows how the pin header of the DAC is soldered to the board.
  • Page 32 First, carefully remove the plastic holder of the pins. This has already been done with displays from TubeOhm. Then the pins are shortened. Now all the pins measured from the bottom are approx. 4..4.5 mm long. This is enough to...
  • Page 33 To ensure that the display sits firmly and straight in the board, it is screwed into the board with two M2x12 screws and three nuts each. This is how the LCD looks when it is installed. Now the IC 6N137 , the opto-coupler for MIDI and the previously prepared Teensy 4.1 are plugged onto the motherboard from below.
  • Page 34 5 Volt USB interrupted ? Heat sink glued on ? So the basic version without Jeannie's effect is ready and can be put into operation. The excitement is rising - also for me because I have built the prototype board and...
  • Page 35 Have I connected an audio cable with a 6.3 mm stereo jack plug? The SD card is formatted in Fat 32 and all files have been copied to the SD card. Jeannie is connected to 12 V. Jeannie's screen is white.
  • Page 36 With a brand new Teensy, the Jeannie Synthesizer software must be transferred to the Teensy 4.1. The Teensy is connected to the computer (Win PC) via a USB cable. The Teensy.exe program is started Now press the button on the Teensy,...
  • Page 37 At the same time, the Jeannie's screen is white. Via the menu 'File , open HEX File'. the hex file ' Jeannie V1.0x.xx.hex' is loaded with a double click.
  • Page 38 Now press the ' reboot ' button. And Jeannie comes to life After booting, please check if bank A has been loaded. Jeannie saves the last sound. With a new Teensy, nothing is saved yet. The sound bank can be set with the first potentiometer from the left.
  • Page 39 That is why we have developed an effect board with the FV-1 which can simply be plugged into Jeannie and it enchants with reverberation rooms, long echoes, a chorus and much more. As a special effect, the clock frequency of the DSP can also be controlled. Of course, all parameters can be stored.
  • Page 40 1x Spinsemi 1001 FV-1 SMD/SMT 1xTL074 SOIC 14 SMD/SMT 1x LM13700 SOIC 16 SMD/SMT 1x 24LC32 EE-Prom from Tubeohm . This contains the effects programmes. Procedure First come the SMD ICs, then the resistors, then the semiconductors and finally the IC socket for the EE-Prom and the pin header.
  • Page 41 Now we solder 13x10k and 4x22k R9,10,11,15,12,13,14,16,17,20,23, 24,25, R4,5,6,7 R9,10,11,15,12,13,14,16,17,20,23, -through hole 24,25, =10Kohm -brown,black,black,red,brown R4,5,6,7 =22kohm -through hole -red,red,black,red,brown Than R 22,21,26,18,19,1,2,3,8 R21,R22=2,2 Kohm -through hole -red,red,black,brown,brown R26= 1M ohm -through hole -brown,yellow,black,black,brown R18,19= 220ohm -through hole -red,red,black,black,brown R1,2= 1kohm -through hole -brown,black,black,brown,brown R3,8= 100R...
  • Page 42 A 10K resistor for the external clock line MUST be soldered in --Important !! Rext-CL (Extern Clock) -through hole -brown,black,black,red,brown important *** the 10k reduce the amplitude of the external clock...
  • Page 43 Resistor Rext-CL (external clock) is used to prevent reflections on the external clock line. The resistors are now all soldered in. Now let's install the capacitors. 10x100nF C3,13,14,15,22,23,24,,27,28, -through hole =100nF -marked 104...
  • Page 44 2x1 nF, 2x 2.2 nF, 1x 330 or 470 nF as well as 2x 560p or 680 pF are soldered in. 2x1nF C1,2=1nF -through hole -marked 102 or 1000 C18,20=2,2nF -through hole -marked 222 C26= 330 nF or 470 nF -through hole Marked 334 or 474 smooth the PWM for...
  • Page 45 Now the last parts are added, 8x 1uF electrolytic capacitors, 1x 10 uF electrolytic capacitor, 3.3uH coil, the 2N3906 transistor and the IC socket. C4,5,6,8,9,10,29,30=1uF -through hole -makted 1uF attention- small Elko C17=10uF -through hole attention- small Elko Transistor 2N 3906 -through hole 1x Coil 3,3 uH or 4,7uH -through hole...
  • Page 46 Now only the 3 pin headers have to be soldered. To do this, insert the pin headers into the Jeannie motherboard and press the pin headers flush into the socket headers. The effect module is placed on the pin headers .
  • Page 47 And soldered. Finally, the EE-Prom (-in the TubeOhm kit-) should be used. As you can see, some components are not assembled. A quartz crystal is not needed. Furthermore, there is no 15 pF. The same board can later be used as an effect for a Eurorack module (in progress).
  • Page 48 The current software version is 1.42A / Date 01.04.22 I now refer you to the user manual where you will find some useful tips and tricks. Andre' TubeOhm Instruments 2021 Special thanks to: Rolf, the programmer T-Synth for giving ideas...