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Combined LFO and Envelope Generator mini module
Synth
Kits

Maybe the smallest LFO (Low Frequency Generator) and envelope generator module (ADSR) in one. 68mm x 45mm, 5V-level. Powered by ATPC v4, ATBase or to use standalone with USB to stereo mini jack adapter.
The LFO/EG is based on the ATtiny25 microprocessor, produces control-voltages in the range of 0-5V and can be operated as a low frequency oscillator or envelope generator. You can set the mode by pressing the button at startup. In LFO-mode 5 waveforms are available: Square, Sine, Triangle, Ramp-Up, Ramp-Down. Furthermore, speed, modulation depth and bias (average value) can be set. As an envelope generator, the module can process the classic parameters attack, decay, sustain and release. The signal can be triggered via the gate input or the button. The LFO/EG can either be connected directly to the noisio synths via the red jack or can be used standalone with any CV capable device and a USB to mini jack adapter.



The red TRS jacks uses a special scheme to simultaneously provide 5V as a power source.

This video shows how to connect CV-devices to a former version of the noisio ATPC synthesizer. The functions of the ATBase now are fully integrated into the latest version of the synth and can be selected at startup with mode "Bass Base" (1B):


The AT LFO/EG module comes as a soldering kit or fully assembled.
The kit is easy to build, even for beginners at soldering and was probed and refined on many workshops over the years. Find the positions of the parts under the BOM-link or directly written on the PCB and make sure you've read the tips + general building instructions for noisio kits before you get started: https://www.noisio.de/docs/noisioGeneralSolderInstructions.pdf

Links to code and documentation

Documentation (noisio.de)

Code (codeberg.org)

Schematics (codeberg.org)

Bom (noisio.de)

Shipping policy

Orders are shipped within 1-3 working days after payment is received.
For international customers outside the EU: Import duties, taxes, and all other fees are the responsibility of the recipient.

Here are some extras that might be useful for your project!
The ATPC-synthesizer acts as base for the CV-module
Complete the mini-modular system with the Keys

AT LFO/EG - CV Module

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$30.72

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Dresden, Germany
0 orders since Sep 25, 2026
Experimental Creative Electronics