Need help with a very simple LED delay off circuit.
I think it's with a resistor and capacitor, but I don't know how the circuit works, or how to calculate how long the led will stay on for.
I've seen this video.. Which shows a 9v battery charging the capacity, and the LED stays on for what seems like a long time.
Sorry about the music, it's not my video.
I've seen stuff like this on YouTube, but don't know the approte search string to search and find more videos like this. Any help would be apreciated.
Something like this...?
I'd like keep the LED on for about 3 seconds, then make it go off, either dimming it off, or suddenly make the LED go off.
I think it's with a resistor and capacitor, but I don't know how the circuit works, or how to calculate how long the led will stay on for.
I've seen this video.. Which shows a 9v battery charging the capacity, and the LED stays on for what seems like a long time.
Sorry about the music, it's not my video.
I've seen stuff like this on YouTube, but don't know the approte search string to search and find more videos like this. Any help would be apreciated.
Something like this...?
I'd like keep the LED on for about 3 seconds, then make it go off, either dimming it off, or suddenly make the LED go off.