/diy/ - Do It Yourself

Hey guys I'm still fairly new to electronics but trying to learn quickly...

Anyway I'm looking to make a timer with a preset time where you push a button, and it provides a constant output for that preset time length BUT I also want it to be retriggerable - meaning I hit the button again and it works again at the preset time.

I don't know if it would matter if the button is hit during a running timer versus one sitting in standby, preferably it would just reset time to the preset time again to keep this simple.

I know 555 timers are simple and can do all that except for the retriggering part is more complicated... Are there any other simple ICs that would be better suited to this? I want this to be reliable, functionality is simple: preset time built in using resistors/capacitors, LED powered by the output, timer resets to preset time on button press. If it makes it simpler I could do two buttons - one to start the timer and one to abort?

Thanks diy

>>362626
IC chips are just prepackaged circuits all packaged together neatly for you so you don't have to reinvent the wheel each time. Any basic beginners electronics lab should teach you how to build a timer circuit from resistors, capacitors and such. Once you understand how a timer circuit is constructed, you can use a 555 circuit. It's like learning basic arithmetic before letting you use a calculator.

>>22038
this