The trick is to flash an empty sketch to the TinkerKit LCD. The timing is a bit tricky but it works well enough. When I have time I'll see if I can make cheap units using an ebay arduino nano, a cheap eBay LCD, and a postage stamp of PCB for the BJT, zeners, and resistors. It looks like the minimum BOM is $8 without case.
Last edited by H-Man; 03-31-2016 at 07:00 PM..
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