SOLVED: System RESET works, sort of

[Demon]

Solved: see post #5:

https://www.picbasic.co.uk/forum/sho...426#post156426

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This works fine if I press it for nearly 1 second.




But the LCDs display garbage if I press it quickly.

I was hoping to get away from using a 555 timer and an inverter to trigger the mosfet.

(yes, I had both ICs wired, and then I took it apart thinking I had found a shortcut, which isn't working as well as expected)


EDIT: This guy just gave me an idea to try:

https://electronics.stackexchange.com/a/322184

[Ioannis]

Maybe you just need a cap in parallel of the button and a diode in parallel with the resistor, cathode to +Vdd. 10uF would be a good start.

Ioannis

[Demon]

Maybe you just need a cap in parallel of the button and a diode in parallel with the resistor, cathode to +Vdd. 10uF would be a good start.

Ioannis

Nope, no difference.

[Demon]

I tried this guy's idea of a RC delay on the mosfet.

https://electronics.stackexchange.co.../322184#322184


I tried with 10uF and all the way up to 1M (both to VDD like that link), no difference. I didn't even get a delay.

[Demon]

GOT IT! Reinstalled the 555 timer with 7404 inverter.

I had to up the capacitor to 100uF. Works beautifully with 10K.

Just over a second (by eye), so now I can blip the button and reset is complete.

[Demon]