Leo is correct, this could be done with a fairly simple circuit, a low current 5V coil relay and a diode comes to mind. For instance, I have some 5V coil relays that have a 10ma operating current, I'm guessing I could probably use the LED output directly to activate them, a diode would make them directional. In the worst case, I'd have to add a transistor or FET driver to provide more current if the LED output isn't up to the task.
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