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Category: Projects

Tap Tempo LFO (TAPLFO V2D)

Posted on May 8, 2012March 25, 2020

2018 Note: Obsolete! This chip has been superseded by the TAPLFO 3 The new chip adds several features, has additional waveforms and improved resolution, and also no longer requires a crystal. It’s an improvement in pretty much every way! Head over and check out the data sheet. This simple Tap Tempo LFO is based on the […]

Posted in Projects, Synth DIY   29 Comments on Tap Tempo LFO (TAPLFO V2D)

Moog 911 ADSR Envelope Generator clone

Posted on February 22, 2010March 4, 2016

A clone of a classic using my PIC code by J-P Desrochers Jean-Pierre Desrochers wanted to copy the response of the Moog 911 envelope generator using more modern technology. He asked me if it would be possible to tweak the response of my PIC envelope generator to do this, and I told him that it […]

Posted in Envelope Generators, Projects, Synth DIY   Leave a Comment on Moog 911 ADSR Envelope Generator clone

White Noise Source for MM5837 / MM5437 replacement

Posted on September 29, 2009May 21, 2024

A pure white audio noise generator using an 8 pin PIC 12F675 This pages describes a simple digital noise source that produces pure white noise over the whole audio band – out to more than 40Khz, in fact. With filtering, you can derive pink noise and other colours. The circuit diagram included below was developed […]

Posted in Noise, Projects, Synth DIY   19 Comments on White Noise Source for MM5837 / MM5437 replacement

Voltage Controlled ADSR Envelope Generator (VC ADSR 7B)

Posted on July 20, 2008February 26, 2024

A CEM 3312 / SSM 2056 clone using cheap PIC microprocessors This page describes a cheap clone of the CEM 3312 and SSM 2056 voltage-controlled envelope generator chips. Both of these chips include voltage control of A, D, S and R, but both include other inputs too. The CEM 3312 chip has a input which […]

Posted in Envelope Generators, Projects, Synth DIY   48 Comments on Voltage Controlled ADSR Envelope Generator (VC ADSR 7B)

Voltage Controlled LFO (VCLFO 9D)

Posted on May 27, 2008May 5, 2017

This voltage-controlled LFO is based on the PIC 16F684, which is a pretty basic chip. Nonetheless, this LFO has more features than your average LFO. For a start, it can produce 7 basic waveforms, and also includes a noise source. It can also morph its waveforms under CV control, well beyond basic PWM. There is […]

Posted in LFOs, Projects, Synth DIY   16 Comments on Voltage Controlled LFO (VCLFO 9D)

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Druid code and schematics are released under a CC BY-NC-SA 4.0 license, so feel free to download and use Electric Druid code in your personal synth, pedal, or sonic blastertron 2000. Grab a copy of the schematics and tweak away to your heart’s content. If you don’t have a PIC programmer, you can order a chip from the shop. Check the legal stuff for more details.

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Electric Druid code and schematics are released under a CC BY-NC-SA 4.0 license. Please check the legal stuff for more details. If you’d like to use Electric Druid chips, code, or circuits in your commercial product, we’d ask that you buy chips from us to help support the development of further projects. We can supply programmed, labelled chips in whatever quantities you need. If this isn’t suitable, please contact us to discuss your requirements. Thanks!