Yamaha 12V trigger out

Solution to a first world problem

 

Synopsis

I'm going to use the trigger out from a Yamaha receiver to activate servos that will mechanically activate front speaker amplifier and power amp for the subwoofer (with delay)

Schematic

Circuit

Trigger out charges C1, this will act as debounce
8.2KΩ with D1 as protection for input pin
R2 as relief for output pin (servo  PPM)

PCB CAD

PCB Prototyping

 

Code

Youtube concept tests