Semiconductor-free clock

Simple clock using relays. (Without semiconductors circuit) Since I could not get 1/60 second signal, I slowed down the simulation speed to achieve minute count. So, if you actually build the circuit, please change the resistance and capacitance to a good one. Also, add snubber circuits to all relay coils. The time can be set by pressing the push-switches under the hour, minute, and each. (A long press will result in automatic count-up.) I could not include a seconds counter or a more complex time-setting circuit due to lack of space. This space is too small to run the circuit I designed.

published 2 years ago