Laura Gutknecht, Technical Director at WSUM Radio at the University of Wisconsin, recently submitted a tip on setting up GPIO connections to work with AC and DC in a way that isolates the GPIO gear from harm.
Laura takes over from here:
Our on-air lights are controlled by a 24VAC relay that won’t work directly with the Axia GPIO, so I went online and found an eight-channel relay board that is very popular with the Arduino “maker” crowd. These boards are available all over for around $10 and can be powered directly from the GPIO.
At a little over a dollar per channel, I even bought an extra one for an unspecified future project.
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