I have this circuit to control my doorbell but the voltage on the pin 4 is only outputting 1.2V rather than 3.3V Then microcontroller is not detecting the button push because it thinks the circuit is already low. Is there a reason the pin is only outputting 1.2V. I think if it was 3.3V my program wo…

I have a circuit to control my doorbell but Voltage on pin is too low

anon57585045 November 4, 2017, 7:06pm 3

What is that small square under the yellow switch wires? Please post a real schematic, not a Fritzing.

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