There are times when you simply want to
know if an infrared remote control is
actually working, e.g. after repairing its rubber keypad. This little
checker has
only four components including a lithium 'coin' cell.
Click
here for a .pdf image of the copper side of the PCB suitable for
making your own using the toner-transfer technique. It must print
out as 30 x 33mm. Click here for a zip file
containing the gerber files which a
PCB company could manufacture some boards from.