hello, im actually a CS student trying to control a RC car via parallel port. Im having a little problem with the understanding of the circuit. The car board has two soldered wires going to VCC from positive terminal of battery and GND from negative terminal of battery. Im connecting a ground pin from parallel port to the GND of car board and then I connect a +5V wire from parallel port to one of the buttons on car board to complete the circuit. Battery is already present in the car remote. When I set my parallel port to +5V the car stops and when I set it it 0V the car starts moving.... What is actually happening here?
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