Since your led board works with 12 volts, i would suggest to use an optotransistor as TLP504 to accomplish your goal.
Just Connect the two emitters to ground and the two collectors to signal1 &...
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Since your led board works with 12 volts, i would suggest to use an optotransistor as TLP504 to accomplish your goal.
Just Connect the two emitters to ground and the two collectors to signal1 &...