How to make programmer working:

Problems with programming PIC12C508 may be caused by: In first cases, try folowing: I like to know if you need a diode, battery, or both, to find out if the problem is because of too low voltage, or if it is the current. Also note if you are using a laptop or another computer with special com-port. If possible, messure the voltage at TxD with respect to ground without programmer, and the short circuit current at TxD - GND, without programmer connected.
E-Mail: Jens Dyekjær Madsen.