Hi all, I have an old Arduino Uno (about 7 years -- used it to control laser shutters) which I would like to use for a basic on/off temperature controller to maintain a 300x300x3mm Aluminum plate temperature at 37C (ambient is -25...+25C). The power supply is 12V DC (which I can double to 24VDC if…

True, a transistor circuit is needed to control most all relay's. The relay modules that are readymade for arduino use have that already. but I haven't seen any that can handle that much current. While adding a transistor circuit is relatively easy. As mentioned in post #3 I suggest looking into u…

Recommendation for a high-current DC relay

Other Hardware General Electronics

Paul_KD7HB March 25, 2024, 7:25pm 3

I would look for a MOSFET that can handle your 20 Amps.

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Recommendation for a high-current DC relay

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