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Unless you require galvanic isolation (and it's highly unlikely that you do) you don't need the relay. The EN pin only needs to be above 1.3V to turn the unit on, or below 0.9V to turn it off. The voltage range is anything up to 30V. Just connect the EN pin directly to an Arduino IO pin. Write a HIGH for on and a LOW for off. And of course connect the ...


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You can leave them energized for more than 30 minutes. My 16 year old car with 250,000 km still has the original fuel pump relay. I can't imagine how many hours of continuous use it received over this period of time. The relay in my car is not the same make / model as the relays you are using, so you should check with the manufacture to see if there is a "...


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