Initially, his control box contained a 240V AC to 12V AC 50VA transformer to power the valves, and a 240 AC to 5V DC power ... R4 — a relay controller with integrated ESP8266 and controlled ...
Over on the Hackaday.io stack, [Radomir] is questioning this basic assumption. He’s wondering if the ESP8266 is 5V tolerant after all. If it is, great. We don’t need level converters ...
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