Hello! I have used arduino nano a few times to this turn on LED after delay and then after a few seconds turns off LED, but just recently as shown in this picture I just found a simpler circuit, that uses only few components, But found puzzling that it stays on I want to turn the led off after few seconds. What is a more smart way to do it.
(Current design only does one thing after I plug the battery the LED is off after certain amount of time LED is on. But it stays on.)
look for other simple circuit.
Some good 555 examples here.
So you want delay to turn on, and a delay to turn off?
Do you want this to repeat indefinitely? That would be the only thing you could get a 555 to do. To do it once only you would need more components (such as two 555s or a 556).
You have to connect together pin 4 and pin 8! The two stripes are not conncted together!
Trigger on pin 2 must be a negative pulse. If you have a stable ground signal, you must use a capacitor in series and a resistor to +Vcc.
Buy and study these:
https://www.google.com/search?q=howard+berlin+555
https://www.thriftbooks.com/w/555-timer-applications-sourcebook-with-experiments_howard-m-berlin/14564875/#edition=2264641&idiq=4768554
Look at this:
Yeah, the simplest solution was to use 556. Sadly nearby electric component shops don't have 556 and only have 555 so I chained them up.
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