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Ah,the parallel port…25 pins of circuitry goodness. You can manipulate this port to control peripheral electronics by assigning a high or low state (on or off) to each pin. You can also control the port remotely over the internet.
We’ve found plenty of fantastic tutorials to help get you started. This first tutorial slowly eases you into working with parallel ports while this one goes insanely in depth informing you of every gruesome detail. Have fun and be sure to check out our other circuitry hacks.