I am designing a (hopefully) simple circuit. I've been reading for several days on this site and can't find all the answers I'm looking for. Just getting into this space so thanks ahead of time for any input you can give.
My circuit is battery powered (AAs or 9v, whichever will work)
I want it to function as follows, when a momentary switch is pressed I would like 3 white LEDs to fade on (let's say 2 second fade on) then stay lit for maybe 5 seconds then fade back out over 2 seconds. Timings are a little flexible.
The switch acts as a trigger for the timing circuit to start lighting the LEDs.
After reading the LEDs, 555s, PWM, Flashers, and Light Chasers Index page, I think I might be able to manage using PWM to get the fading LEDs but that only works when power is applied then removed. I need help with the switch/timer circuit.
I think we could run the LEDs at 10mA? They don't need to be super bright.
Also, with this circuit being "powered up" all the time waiting for a switch press, will this drain the batteries within a short amount of time?
My circuit is battery powered (AAs or 9v, whichever will work)
I want it to function as follows, when a momentary switch is pressed I would like 3 white LEDs to fade on (let's say 2 second fade on) then stay lit for maybe 5 seconds then fade back out over 2 seconds. Timings are a little flexible.
The switch acts as a trigger for the timing circuit to start lighting the LEDs.
After reading the LEDs, 555s, PWM, Flashers, and Light Chasers Index page, I think I might be able to manage using PWM to get the fading LEDs but that only works when power is applied then removed. I need help with the switch/timer circuit.
I think we could run the LEDs at 10mA? They don't need to be super bright.
Also, with this circuit being "powered up" all the time waiting for a switch press, will this drain the batteries within a short amount of time?