PIC Synth
PIC based analog synth plans
Courtesy/Thanks to: Kevin (picsynth@yahoo.com)
Description: A real analog synthesizer to build. The two oscillators can be detuned for that classic synth sound.
DCO, VCF, Envelope, VCA, sawtooth, triangle,pulse.
http://picsynth.000space.com
Dual oscillator mono synth
Really easy to build using just 1 custom programmed PIC chip, 4 ICs and single 12v supply
All circuits built on veroboard - no printed circuit board making skills needed
PIC based dual oscillator and digital keyboard scan
Analog VCF/VCA/Envelope
Waveforms : sawtooth, square (with pulse width adjust), triangle
Fully adjustable detune
Arpeggiator and Portamento
The PIC chip is available from above site for $17 US.
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| backpanel.jpg | |
| Back of oscillator panel showing waveshape circuit. The dual waveshape circuit divides the PIC squar | |
| filtamp.jpg | |
| Filter/Amplifier Module : Attack, decay, filter cutoff frequency, master volume, filter voltage | |
| oscpanel.jpg | |
| Oscillator Module : Oscillator 1, range H/M/L, pulse width, waveform (ramp,square,triangle), tu | |
| picboard.jpg | |
| PIC board, showing 18 pin PIC microcontroller and keyboard decoder.The PIC produces three outputs: t | |
| circuit_description.txt | |
| Descriptions to accompany the photos | |
| detunesaw.wav | |
| Detuned sawtooth, hear the detune | |
| egypt.wav | |
| Two thin pulses. 1 Oscillator changes to M position near end | |
| house.wav | |
| Made this up. Top key priority makes for eady playing | |
| oxygene.wav | |
| Hey I never said I could play | |
| filter.wav | |
| Detune + filter resonance high | |
| techinfo.txt | |
| Technical Information on how the PICsynth chip works | |
| lalala.wav | |
| la la la | |
| electguitar.wav | |
| Electric Guitar | |
| midsomer.wav | |
| Midsomer Murders | |
| osc1andosc2.wav | |
| Playing with Osc1 and Osc2 | |
| oscmodfilter.wav | |
| Oscillator Mod Filter. Done with 1 more diode and resistor. | |
| whole.jpg | |
| PICTURE OF WHOLE CIRCUIT | |
| block.jpg | |
| Block Diagram | |
| block.htm | |
| Block Diagram text | |
| variation1.wma | |
| Variations around detune beats | |
| spooky.wma | |
| New vibrato in PICSYNTH v2 chip | |
| techinfov2.txt | |
| Technical info for V2 chip | |
| picsynthschematicv2.jpg | |
| Latest PICSYNTH schematic CORRECTED | |
| improv1.wma | |
| Longer demo of the sound of the PICsynth. | |
| downbeat.mp3 | |
| V3 Arpeggiator demo | |
| rock.mp3 | |
| V3 Arpeggiator demo | |
| train.mp3 | |
| V3 Arpeggiator demo | |
| updown.mp3 | |
| V3 Arpeggiator demo | |
| picsynth_v3_chip.pdf | |
| PICsynth V3 chip information | |
| glide.wma | |
| Example of portamento/glide | |
| fat.wma | |
| Fat sound of new waveshaper, see BLOG on picsynth website | |
| picsynthv3.jpg | |
| Latest schematic - V3 | |
| picsynthvcfvca.jpg | |
| Latest Veroboard layout for VCF VCA | |
| step01vca.jpg | |
| VCF VCA step1 | |
| step02vca.jpg | |
| VCF VCA Step 2 | |
| step03vca.jpg | |
| VCF VCA Step 3 | |
| step04vca.jpg | |
| VCF VCA Step 4 | |
| step05vca.jpg | |
| VCF VCA Step 5 | |
| step06vca.jpg | |
| VCF VCA Step 6 | |
| step07vca.jpg | |
| VCF VCA Step 7 | |
| step08vca.jpg | |
| VCF VCA Step 8 | |
| step09vca.jpg | |
| VCF VCA Step 9 | |
| step10vca.jpg | |
| VCF VCA Step 10 | |
| step11vca.jpg | |
| VCF VCA Step 11 | |
| step12vca.jpg | |
| VCF VCA Step 12 | |
| pulsewidthmod.mp3 | |
| Oscillator 3 Pulse Width Modulation | |
| saw256stepandpwm.jpg | |
| Circuit to produce 256 step saw and PWM from square wave. Used as Oscillator 3. | |
| strings.wma | |
| Strings. OSC1=Pulse,OSC2=Triangle,OSC3=PWM | |
| picsynthwaveshaper.jpg | |
| Veroboard layout for the waveshaper | |
| synthacon.mp3 | |
| Synthacon filter sound | |
| scales.mp3 | |
| Modded Korg Monotron sample | |
| space.mp3 | |
| Modded Korg Monotron sample | |
| 1octave.mp3 | |
| Modded monotron improvisation | |
| medieval2voice.mp3 | |
| Cello and flute sound | |
| 10ufcap.mp3 | |
| Moving harmonics by adding 1 capacitor | |
| picsynth2.jpg | |
| Build a PIC based synth | |
| picsynth.pdf | |
| Schematics and connection diagram for the PIC-synth | |
| www.geocities.com/picsynth/ | |
| PIC Synth site | |