dual LFO with difference rectifier

Two wide ranging LFOs; from approx 830 Hz down to 0.02Hz (1 cycle every 50 seconds), giving tri and square waveforms. There is also a difference rectifier onboard which gives signal corresponding to the positive and negative aspects of the difference between the two tri waves.
All thru holes components, no wiring to do.

http://nonlinearcircuits.blogspot.com.au/2015/03/dual-lfo-with-difference-rectifier.html

• ? mA +12V
• ? mA -12V
• ? mA 5V

Module is available as a DIY project only.

No info about availability.