Motivation
This module starts as a need for my Shakuhachi 2 Synth project. I was in need for a short Gate Delay of about 10ms (which is easy to realize). But then I thought about a more flexible solution with adjustable delay time and optional trimming the gate at the end. To be used elsewhere in the synth as well. So I came up with this solution. The hardware is still simple and the functionality lies in the software. So far I have only realized the function which I nee for my Shakuhachi to Synth project. But you can easily improve about this with changing the software.
Specs and features
- Gate delay with variable timing
- Coarse and fine time adjustment
- Gate in and out with LED signaling
- End of gate trim
- Runs on +/-12V and +/-15V
- Power consumption below 30mA positive rail. 5mA negative rail.
Implementation
Schematic
Gate Delay: Schematic control board
Gate Delay: Schematic main board
Description:
IC1A on page one is the input protection for the microprocessor. IC1B is the output buffer. On page two you see the microprocessor and the additional circuitry for running and programming it.
Calibration
- None
Building hints
- None
Special parts
- None
Download
Gate delay control board documentation downloadGate Delay control board Gerber files download
Gate delay main board documentation download
Gate Delay main board Gerber files download
Gate Delay software files download
Gate Delay *.fpd file
Gate Delay: Front view
Gate Delay: Populated control PCB
Gate Delay: Populated main PCB
Gate Delay: Back view
