Atari Punk Console, Industrial Controller V1

Here is the latest creation, straight from the basement laboratory.

Circuit is based on the famous APC (Atari Punk Console), but with some modifications and my own additions.  Unique recycled enclosure was once used to house a metering pump controller.  Now it is transformed into a unique and one of a kind table top synthesizer.

Single square wave oscillator complete with frequency and rate control's, high and low frequency settings, starve control, output signal cutoff frequency and gain control.  Square wave based LFO with frequency control and selector switch to control two different parts of the main oscillator circuit.

Rocker switches are also recycled as well as the manual selectable potentiometer.  All other circuitry and components are new.

Runs on a single, standard 9-12VDC power supply with positive tip polarity and 2.1mm jack

Standard 1/4" output jack.

LED on output signal.

Circuit Bent Casio PT-87

Modified Casio PT-87

Great vintage keyboard from the 1980's with some very interesting modifications.  This one does not have the traditional bends in the circuit.  Because of the chips used to make this keyboard, the bends I found seemed boring and did not produce an interesting variation of output signal/sound.  So I decided to keep the design effective and

Modifications made to this instrument:

• LFO, with Hi and Low frequency settings
• Frequency control
• On/Off switch
• LFO Shape and Depth controls 

• Pitch control
  
•  Filter
• Frequency and shape control
• True Bypass switch

• 1/4" Mono output jack

Short Demo Video:

Audio routed to my Eurorack Pro -> Computer.  No other effects used.