Dual LFO/Difference Rectifier PCB

This circuit incorporates two LFO's with wide ranges along with a difference rectifier on-board

This is for a PCB only designed for the Eurorack format.

Availability: In stock




The dual LFO has two oscillators on board; these are based on the standard schmitt trigger/integrator design and give a square wave and triangle wave from each. The frequency ranges from 0.02 Hz (about 45 seconds per cycle) to 830 Hz; this can be changed by replacing the 1uF capacitors with larger values for slower rates or smaller values for faster. The triangle wave is 6V, ranging between -3V and +3V. The square wave is 10V, ranging from -5V to +5V.

There is also a Difference Rectifier circuit on the PCB which takes the triangle waves and supplies a signal that is the difference between them. This voltage is then delivered to the appropriate positive or negative outputs, basically a nice complex signal.

Specs & Downloads

Specs & Downloads

100 Non-Linear Circuits
HP 8
Depth No
+12V No
-12V No
+5V No
Additional Resources Build Guide


Customer Reviews (1)

Great LFO, easy buildReview by Jwhtn
I built this as part of the first synth system I put together. Worked perfect the first time. I really dig the complex shapes you can get out of the difference rectifier. This will also get into the audio range for some low drones. Good stuff. (Posted on 3/12/2018)

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