I'm trying to use the serial port to light a lamp. I need to write code that will send the signal to the device. I'm not sure which pin to use as a power source for the lamp, or at least the trigger source; and how to send a signal to that specific pin via C++. It's a 12V lamp, but 2 5V's would work. I've identified a 10.92V lead (Pin 3, Transmit/TxD), that changes to 10.32V when I send it a character. Do different characters send different voltages? Any help on this subject would be greatly appreciated. Thanks

DC