Hello,
I want to control a magnetic valve, that needs 5V and 666 mA.
Am I correct, that i need a Relais module (e.g.) or can I connect a power source to the VIN and the arduino can provide the needed current?
Greetings, Tom
No, you are not correct.
The Nano 5V regulator is only rated for 150mA. You will damage it trying to get 666mA from it.
Use a separate regulator powered from the source that is powering VIN (connect in parallel).
yeah, that was my assumption so I was correct. Thanks for the confirmation, i will use a mosfet.
Tom
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