I want to know if it's possible to use an Arduino output to directly power the coils of a subminiature latching relay. The one I have in mind is the Hongfa HFD3/5-L2, which looking at the data sheet takes a 5v supply to energize the coils. Will the Arduino be able to reliably supply the current to …

Driving latching relays directly

jim-p May 5, 2025, 8:29am 7

Why have you selected those particular relays?
There may be other options that you could use?

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