der nulleffekt

Pure Data on the Raspberry Pi

06.Feb 2020
Here are some workarounds for Pure Data, GPIO, Arduino and some sound cards on the Raspberry Pi 4: Pure Data on Raspberry Pi

Experimental VGA Processor

11. December 2019
A new new all signal mixer (incl. VGA): the Experimental VGA Processor

For mixing and experimenting with analog video signals.

Lenovo Rectangular Power Adapter

2. October 2019
Lenovo Rectangular Power Adapter to 5.5mm Round Jack
To use a Lenovo power supply for a T12-942 solder station.

Electric Intonarumori

31. July 2019
Electric Intonarumori - a noise-synth with beautiful feedback.

Symbiotic Synth

10. Apr. 2019
Symbiotic Synth - a low voltage oscillator that is powered as well as controlled by the human body.

PB202 MIDI to CV Update

15.Jan. 2019
I updated the Paper Bit 202 Midi to CV board. It has now 4 CV outputs and gives out the clock signal as a trigger sinal.

PB705 VCCC Voltage Controlled Chua Circuit

23.Jan. 2019
Chua's Oscillator for Paper Bits! PB705 VCCC Voltage Controlled Chua Circuit

VGA & Sound Blender

10.Dec 2018
The all purpose signal to VGA mixer: VGA & Sound Blender

RS232 Control

19. Oct 2018
A RS232 Controller for two Waveplayer8: RS232 Controller

PB808 Kick Drum

09. Oct 2018
The 808 Kick Drum for the Paper Bits is online!
PB808 Kick Drum

Pop Neuron 2

1.Sept 2018
New version the Pop Neurons:
Exitatory Pop Neuron 2
Inhibitory Pop Neuron 2

Confetti - An Analog Computer

15.Jan 2018
Confetti is a modular analog computing system.

Pop Neuron

12.Jan 2018
the Paper PCBs: Pop Neuron
the exhibition: Symbolic Grounding


12.Sept 2017
Keyboard-compatiblility for the Paper Bit:
the PB702 MIDI Synthesizer.

A simple Hat

12.Sept 2017 That simple Hat for an Raspberry Pi helps if one just needs some buttons and LEDs.

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If not other mentioned all software and boards are written, designed and developed by Wolfgang Spahn 2008-20.

Except where otherwise noted, content is licensed under the following license: CC Attribution-Noncommercial-Share Alike 4.0 International.

Creative Commons License