On 1/8/19 8:18 PM, ED SHARPE via cctalk wrote:
 Chuck we would like a couple..? ed at smecc 
For the keyboards, my source is Electronics Goldmine
(
https://www.goldmine-elec-products.com/) for the keyboards.  Usually
$10 each, but go on sale every now and then for $5.
"Blue Pills" can be gotten off of ebay or aliexpress.  I use a 38 kHz
TSOP4838 DIP-3 IR Receiver.   For the USB version, it's mostly a matter
of soldering on the sensor to the Blue Pill and programming it.
So no custom boards or anything.  I like cheap.
--Chuck