15khzvgatester It's free. Based on Nick Gammons work: http:https://www.gammon.com.au/forum/?id=11608 DTCTR notes Make sure your vias are covered othervise you'll probably connect them to the battery's GND. Multisync software notes Keep switch pressed for ~10 seconds to change video mode Rev2 of Arduino Uno shield Allows a mini logic analyzer to be plugged in J3