I'm curious if anyone has an LED circuit that will have a series of LEDs flash one at a time? I've only been able to find a circuit from Forest Sims that would have the LEDs light up one at a time as voltage increased, but not go out afterward.
I'd like to have something powered by 12v DC or less.
You are not giving us info on what the purpose of your display is. If it is sequential, the 4017/4020 CMOS with drivers for the LEDs on the outputs is what you are after. If you want a volt or VU meter the LM3914 series of ICs can be configured in dot mode. E
Okay, I see from your examples that I wasn't clear enough--sorry.
What I want to function is as follows:
1. Light One Turns on
2. Light Two Turns on as Light One turns off
3. Light Three Turns on as Light Two turns off
4. Light Four Turns on as Light Three turns off
5. Light One Turns on as Light Four turns off, Goto 2
That is the effect I wish to produce using a circuit powered by 12V or less DC.
The parts you want are a 555 timer and a 4017. The data sheet for the 555 timer can be had here and the data sheet for the 4017 counter can be found here. Any electronic parts house should have those parts and they are very inexpensive. They would be setup with a small handful of other parts. This is a very common circuit and a Google of 4017 LED Circuits should bring up plenty of hits or there is a variation that can be found here.
I Know Radio Shack sells the 555, not sure about the 4017.
This link has some real good explenartions and circuits: