I'm not sure where to place this query or even to describe it succinctly but: I have an irrigation controller which has been good for a year or so. It is powered by a mains-connected AC transformer with my rectifier circuitry that then uses a buck DC-DC module and finally a three pin voltage regul…

Goes unresponsive intermittently

330R November 22, 2021, 11:03am 13

Nobody mentioned optoisolators yet, but they may help, too.

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