So being new to this, I've found conflicting information on the output current of my Mega board which I want to use to drive a relay with.
I have a relay board (4 relays) on and it works find. I also have a 25 Amp SSR which I can seem to drive as well (input is opto coupler voltage 3-24 volts).
When I activate the later, my LCD display dims down quiet a bit.
I was reading that to protect the output pin of the arduino, a resistor should be used to limit the current. Can others out there confirm this?
I was under the impression that enough voltage/current is provided by the on-board regulator.
What are others experiences with driving relays? Is it safe without a resistor?
Robert
I have a relay board (4 relays) on and it works find. I also have a 25 Amp SSR which I can seem to drive as well (input is opto coupler voltage 3-24 volts).
When I activate the later, my LCD display dims down quiet a bit.
I was reading that to protect the output pin of the arduino, a resistor should be used to limit the current. Can others out there confirm this?
I was under the impression that enough voltage/current is provided by the on-board regulator.
What are others experiences with driving relays? Is it safe without a resistor?
Robert
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