Fitzgreyve Synthesis

Eurorack Synthesizer DIY.

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Tuesday, 26 August 2025

"Moog" LFO, and Ribbon Controller PCB

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 Two new offerings: First, we have a simple triangle/square LFO module, inspired by those in Keith Emerson's custom Moog Modular - compl...
Wednesday, 20 August 2025

992 to 904C

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 I've updated the 904C build manual (V1-3) to include more info on connecting a 992 "Control Voltages" module to the 904A and ...
Tuesday, 17 June 2025

Free 100m-ish Analogue Delay panels

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I've recently tried to get a colour match to the grey Behringer 100m panels. This has resulted in a lot of spare  "100m-ish Analogu...
Tuesday, 18 February 2025

6401 Ring Modulator

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The  6401 is a Eurorack implementation of the Moog Bode 6401 Ring Modulator. The core ring modulator circuit is passive, using diodes and ...
Thursday, 15 August 2024

Hacking the M5Stack MIDI module, a cheap SAM2695 General MIDI module

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  Where I have needed a General MIDI chip (GM module and CV-to-MIDI) ,  I have previously used the S2 waveblaster module from Serdaco BV, bu...
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Fitzgreyve
PCBs and panels for eurorack Synthesizer DIY.
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