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I tested the old 7805 (the one I thought was faulty and I replaced) Hooked up to a 9 V battery the output is 4.983 V. I am pretty sure that the voltage is too high, on IC2 pin 15 and pin 16 and pin 1 of the GPIO header and pin 1 of the LEDS header I measure 6.4 V. So I took out the 7805 again and da...

Hi, I have a OTG DIY USB. I started the measurements according to http://otgw.tclcode.com/debugging.html#power steps to follow: The first thing to check is the power supply. Start out with the gateway unplugged from mains power, thermostat and boiler disconnected, and the IC's removed from their soc...