Week 10: Output devices

This week's assignment is to add an ouput to a designed microcontroller board. Since I'm now thinking mainly about my final project, I have split this assignment into two parts: (i) Clapper switch for my amplifier; (ii) speakers for my future DAC board, which I will start assembling this week.

Output device 1: Solid-state relay for a clapper switch

For my input device , I have used the relay as an output (to switch the tube amplifier for my final project)

Solid-state relay

Christmas lights turned with a clapper

Output device 2: Speakers/pre-amp for the DAC board.

XMega "Hello world"

Successful test of XMega

DAC board + pre-amp

Initial sketch of the DAC + pre-amplifier

Issues that I faced

• I could not start XMega with a standard CrossPack on my Mac . I had to install the homebrew
• There is no way to start XMega with the Usbtiny device . You have to use PDI programmer

Files

• Eagle PCB design