Switching between LED circuits


I’m not sure if this is possible but what I would like to do is have a LEDs lit around a mirror which after a set amount of time then switch to a set of LEDs that are behind the mirror. So when turned on the front set of LEDs light up, and after a set amount of time the front set switch off and a back set come on then either go back to the front set or can be turned off. Firstly is this possible? And if it is how would I go about making it.

by Davemajor
August 02, 2022

Quite possible indeed. I use DC source for simplicity:

Run the Time Domain simulation. The DC source V1 turns ON at one second.

Check the current in each DEL to see that once a DEL, D1, turns OFF, the other, D2, turns ON.

If you wish to use an AC source, you will have to add a full bridge rectifier AND a voltage drop (to not burn out the DEL or the PMOS).

Increases either R1, either C1, either both, to increase the delay.

If the delay is too long, that it makes R1 or C1 too large, use an MCU, such as an Arduino, to built a new circuit.

by vanderghast
August 03, 2022

Amazing thank you

by Davemajor
August 03, 2022

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