Motivation
This logic module was thought to be used for my drum case to combine gates and triggers, scalable from two in one to eight in one. The output of each stage is normalled to the next input. Besides "OR-ing" the incoming signals together, they are set to 5V square output (easy changeable). So you can make use of this logic module in audio as well. Rectification, clipping and mixing in the audio domain makes for some interesting sonic experiments.
Specs and features
- Scalable from two in one to eight in one.
- Input signals "OR-ed" together.
- Output signal level set to 5V square (easy changeable).
- Voltage input switching threshold level 2V.
- Works well up to audio range.
- Runs on +/-12V and +/-15V
- Power consumption below 30mA positive rail. 5mA negative rail.
Implementation
Schematic
OR: Schematic control board
Description:
Easiest way to look at it is to think of a lot of diodes. All those diodes just OR the input signals together. The DG202B switches on at about 2V threshold.
Calibration
- None
Building hints
- If you want to change the output level, adapt R1 and R2 to your needs and adapt the series resistors for the LED accordingly.
Special parts
- None
Download
OR control board documentation downloadOR control board Gerber files download
OR *.fpd file
OR: Front view
OR: Populated control PCB front
OR: Populated control PCB back
OR: Half front view
OR: Back view
