Being a Modularist for almost 2 Months i refined all my LFO Modulation needs into my first EuroRack Modular Module: the RED LFO.

RED LFO small

It can perform the most common Modulation Tasks:

  • Ramp Up
  • Triangle
  • Ramp Down
  • Rect
  • Sine
  • S/H
  • Noise
  • Offset Voltage

All the Waveforms can be played with 8 Bit resolution and up to 15,5 Hz which is certainly not audio Rate but best what the PicAxe chip can deliver without aliasing. There are 3 interpolated Waveform inbetween the linear Waveforms from Ramp Up to Rect. Due to the limited CPU the LFO renders the Waveforms offline when selecting another – this means it will stop for a second oscillating indicated by lighting the Mode LED red.

All Waveforms play full ±10V and can be attenuated by the Level Pot, there are 2 Internal Trimmers for Range and Offset.

Nice extra and unique Feature is the ability to sync the Tempo of a RED LFO to another Master RED LFO via an internal Serial Link – simply turn the Frequency counter full CCW – the Mode LED will light up yellow and the Module will happily follow the Masters Tempo. You can shift the Phase of the Slave LFO with the Frequency Pot. If you want to leave Slave Mode turn the Frequency Pot full CW, the Mode LED will turn off and the LFO runs free. You may chain RED LFOs for as much Rackspace you have.

S/H Mode emits the typical Random S/H Signal, Noise produces some digital Noise and turning the Mode Pot full CW emits an Offset Value dertermined by the Frequency Pot, all these Modes with Yellow/Red indication from the Mode LED.

The needed +5V for the CPU is either generated by an internal PSU or can be taken from the +5V Rail of your Rack (and then left blank on the Board). The internal 5V Rail can even be routed to the Racks +5V Rail and serve as a +5V Adaptor for other Modules. Theres also Reverse Voltage Protection.

See here for some more Pictures

The RED LFO now will go into a Pioneers Run Stage with a limited number of selected Modularists testing. After this ill have PCBs produced and prepare Kits…. stay tuned.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s