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Guitar pedal backplane | PCB Design

Guitar pedal backplane
Version 1 - Last update: Oct 4, 2015

A backplane to support the rapid development of guitar pedal designs.

The guitar pedal backplane supports the following:
Power supply: plug switching and regulation
3 parallel power channels
1 - Regulated 5v
2 - Voltage divided 2.5v
3 - Ground
5 parallel io channels:
1 - buffered input from buffer slot
2 - buffered output
3 - Com 1 - 100k pull up to Reg 5v - Inverting input to input buffer
4 - Com 2 - 100k pull up to Reg 5v - Clock/PWM
5 - Com 3 - 100k pull up to Reg 5v - Data - analog or digital
1 serial io channels:
1a - Serial input
1b - Serial output (connected to next serial input)
6 internal headers:
1 input buffer slot - Special: Serial input from input jack, Serial output connected to buffered input
4 fx stages
1 output buffer slot - Special: Serial output connected to output jack and buffered output

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