Display - countdown timer 59 to 0

213

02:57:41

This circuit count 59~0. With open switch: reset again to 59 and continue; with close switch: stop when the two displays show "zero". For countdown timer projects.

published 10 years ago

kaivanveldhoven

10 years ago

Also good luck finding a 5V relay which can handle 50kA ;)

jose_anchieta

10 years ago

Thanks for comment, I thought the relay in the simulator does not work with low currents ;)

jose_anchieta

10 years ago

Changed the relay for PNP transistor, will work correctly now? I not have this transistor now for test in real world.

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