Hello everyone,

I am looking for a circuit that when a button is pushed 3 LEDs come on for ~1 minute and then goes out. Can someone help me out with this circuit?

 

Welcome to AAC!

A simple solution is to use a 555-timer circuit.
You can also do it with just a resistor and capacitor.

 

A simple 555 circuit will likely be enough, but the devil is in the details as to how you actually go about doing it.

Is the button going to be released right away? If the button is held down for, say, two minutes, how do you want the LEDs to behave? Still only stay on for one minute? Stay on for one minute beyond the time when the button is released? Stay on until the later of one minute or the button being released?

What if the button pressed and released again partway through the one minute period from the prior press? Do you want that second press to be ignored? Do you want the LED to continue staying on until one minute after the second press?

 

What sort of LEDs?? There is a huge spread in power required, depending on how much light they give.

 

If it's to be battery operated, what colour LEDs would be used? It may need two or more batteries if they are not red.

 

There have been a few posts like this recently , is this a homework question ?

 

The circuit could be very simple: The three LEDs in series across a high value capacitor. Pressing the button connects the cap to a suitable voltage battery, and the charged cap keeps the LEDs lit for a minute. I saw no specification as to how long the button was pressed. Certainly the LEDs will fade and grow dim. No spec that they have to stay bright.

 

Wendy's Index
LEDs, 555s, Flashers, and Light Chasers
CMOS 555 Long Duration Minimum Parts LED Flasher

 

Hello everyone,
I am looking for a circuit that when a button is pushed 3 LEDs come on for ~1 minute and then goes out. Can someone help me out with this circuit?