Second PCB

A project log for Arduino Nextion Android Midi Valve Guitar Amp

Control a Marshall JCM800 2204 style guitar amp using touch screens, midi foot pedals and an Android App

Paul BurfordPaul Burford 09/08/2019 at 15:510 Comments

The second PCB was to house the Arduino, the FX loop and the gain pot optoisolators. I decided to mount it directly underneath the main PCB, 20mm apart using spacers. Any connections between the two would be made using 0.1" spaced double ended headers. After arrival from China, the population of the second PCB began and the two PCB boards were mated together.

The three empty optosolator component spaces can be seen at the top of the PCB. They were now relocated to the lower PCB resulting in a much lower noise floor.