555 Variable Countdown Timer

268

05:09:04

I put a lamp as there's no buzzer.
Thanks for help Wyoelk.

published 2 years ago

croupdollatech

2 years ago

Put a switch in series with the power source. Close it after starting the simulation.

wyoelk

2 years ago

Maybe these can help, http://everycircuit.com/circuit/5212107531091968 and http://everycircuit.com/circuit/5997908791656448

Gilou

2 years ago

Thanks for the tip. Added the switch and animation starts. Countdown doesn't seem to work though (set in real time ofc) Thanks for the links.

wyoelk

2 years ago

This is how it probably should look, http://everycircuit.com/circuit/6660533591474176 it is important to keep schematics clean and organized for troubleshooting

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