Voltage Processor and Comparator - mcop/projects GitHub Wiki
This was another module designed for 7dials which never saw the light of day, snazzily named VP+C.
It's another 4HP utility with a Voltage Processor at the top and Comparator below. The Voltage Processor is pretty standard - an attenuvator and offset enabling you to flip envelopes or make Bipolar signals Unipolar (or do the opposite!).
The Comparator was deliberately based on the LM311 comparator chip as it has an additional enable control which I've implemented here. This means the comparator can be used to extract a gate or generate PWM from a VCO but the output can also be disabled by another gate. This can be used for things like rhythmic pulsing of the output without using a VCA or to create a logical function using the input and the Inhibit input.
The Inhibit input disables the signal when the input is High so with nothing plugged in the Comparator output is always enabled.
Operation
Voltage Processor
- Attenuvert - Scale and inverts the signal.
- Offset - adds an offset to the signal.
- Red & Green LED's - give some indication of what is happening to the signal.
- Input & Output - do exactly what you'd expect!
Comparator
- Threshold - sets the threshold level where the comparator changes state.
- Red & Green LED's - give some indication of the Threshold level.
- Orange LED - indicates the output.
- TH (Threshold Input) - summed with the Threshold level set by the knob.
- INH (Inhibit) - a logical high signal here inhibits the output.
- In - input for the signal to be compared against the threshold.
- Gate - Gate output.