| PIC board | ||
| 1 | PICsynth chip | |
| 1 | 74HC154 IC | |
| 1 | 20 Mhz ceramic resonator (or quartz crystal and 2x15pf caps - see blog) | |
| 1 | 78L05 5v regulator | |
| 2 | 0.1 uF polyester cap | |
| 1 | 10 uF electrolytic cap 16V | |
| 1 | Rotary tuning switch 2p4t | |
| 1 | 16 way ribbon connector for keyboard | |
| Resistors 7x4.7K | ||
| Waveshape | |
| 1 | 4520 cmos dual divider |
| 1 | LM324 Quad op-amp |
| 2 | 10K lin Potentiometers |
| 1 | 1M lin potentiometer |
| 1 | 0.1 uF polyester cap |
| 2 | 1 uF electrolytic cap 16V |
| 1 | 47 uF electrolytic cap 16V |
| 2 | 0.01 uF Polyester cap |
| 4 | 1p3t slide switches |
| Resistors 6x4.7K, 4x10k, 10x100K, 8x200k, 2x133K, 2x2.2M | |
| VCF/VCA/Envelope | |
| 1 | LM324 Quad op-amp |
| 4 | 2n3904 or BC547 transistors |
| 2 | 1N4148 diodes |
| 1 | 10 uF Tantalum cap 16V |
| 4 | 1 uF electrolytic cap 16V |
| 2 | 0.1 uF polyester cap |
| 1 | 10 uF electrolytic cap 16V |
| 1 | 100 uF electrolytic cap 16V |
| 2 | 0.022 uF polyester cap 16V |
| 1 | 470 pF disc ceramic cap |
| 3 | 100K Lin potentiometer |
| 1 | 5K Log potentiometer |
| 1 | 1K trimmer horizontal |
| 1 | SPST slide switch |
| 1 | SP3T slide switch |
| Resistors 1x100 ohm, 1x560 ohm, 2x330 ohm, 2x2.2K, 7x10k, 1x22K, 4x100K, 2x1M | |
| Misc | |
| 1 | 3 1/2 or 4 Octave keyboard with diodes in series with each switch eg salvaged from old Organ |
| 8 | Knobs |
| 1 | 18 Pin IC socket for PIC, optional sockets for others |
| 3 | Small Veroboards offcuts |
| 1 | RCA Output socket |
| 1 | DC power socket for 12V DC |
| Shielded audio cable, ribbon cable for keyboard, wire | |
| Cost Estimate in USD | |
| PIC chip $15 including postage and packing from NZ PIC board components $8 Waveshape board components $19 VCF/VCA/Env components $19 cost of keyboard mine cost me $10 Misc $18 TOTAL $89 + cost of wood for case. This gets you the basic PICSynth. To allow access to extra functions like portamento and arpeggiator you need :
12x Buttons momentary action
Oscillator 3 with PWM enhancement Around $21 of the $89 is the cost of the 7 potentiometers - if you can find a cheap source of these or use salvaged ones you will save a lot. I recommend you have an oscilloscope for a project like this, it is very useful if something goes wrong in the wiring up to trace the signal path.
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