@sydneyfalk @squirrel you can just use a little piezo speaker and an attiny/atmega with a coin cell, and then have infrared links if you want them to sync up
maple classic™ 
@er1n @sydneyfalk sure, but price of electronics + fabbing is pretty undoable for me atm
@sydneyfalk @squirrel you can just use a little piezo speaker and an attiny/atmega with a coin cell, and then have infrared links if you want them to sync up
@er1n @sydneyfalk sure, but price of electronics + fabbing is pretty undoable for me atm