thanks for the excellent artical.
I tried the circuit (40pin) with Proteus 7.4 and windows asked me driver and
everything was ok.
But when I tried on the breadboard after adding the 4.7k resistor , all four leds were ligt up and Windows pop up "device unrecognized" and at each time the pic warm up. I haven't used a connector on pic side.
When I try reprogram the pic , I couldnt program the pic.
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