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vulcan needed, must be good in logic.

A project log for hacking a smoke detector

adding an ESP-12 with some flipflop magic and MQTT

davedarkodavedarko 01/14/2017 at 00:540 Comments

01:49 am - no boards ordered.


When breadboarding around I've noticed that I made a fatal mistake in that I've connected every GND signal, where there should have been two GNDs that will only be connected when the MOSFET is turned on by the 4001 NOR gate RS Flipflop. So at this point the boards can only be used as breakout boards.


I still have to test the transistor circuit, I think I have it the other way around. I'll test that tomorrow to be fully sure this time. I think I have to pull it low with a resistor and use a PNP instead to reset the flip flop.

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