? Close Encounters ?

[tinkerunique]

3 v, DC ( 2 AA bats.) 6 chasing LEDs. I want then to chase in an 8" circle. Am familiar w/ Radio Shack LEDs & Flashing LEDs - but want sequencing rotation for small projects. Newbie to hobby / want more. Thanx.

 

[Janis1279]

6V Ultra-Bright LED Chaser - circuit diagrams, schematics, electronic projects

 

[audioguru]

6V Ultra-Bright LED Chaser - circuit diagrams, schematics, electronic projects

My 3V Ultra-bright Chaser project lights red LEDs brightly for months, and still works when the battery has dropped to only 2V.

 

[tinkerunique]

Audioguru - Schematic looks good.. Is there a way to adjust the secuence timing a bit... resistor or ?? -

 

[audioguru]

Audioguru - Schematic looks good.. Is there a way to adjust the secuence timing a bit... resistor or ?? -

The pot R2 adjusts the speed of the sequencing. It goes from slow to fast.
Mine are set at half-way, not slow and not fast.

 

[Tinker Unique]

Have seen this post before. Very good. Simple & effective. Any mods needed to make it 12v. ?? AND - will it be possible to run two LEDs off of 2-3 pins instead of just one ?

 

[audioguru]

Any mods needed to make it 12v. ??

I selected low voltage ICs for the projects. It can be completely re-designed to use higher voltage ICs.
An ordinary CD4017 can drive LEDs when they have current-limiting resistoprs. the CD4017 can be driven from a simple oscillator without the logic I used to make each LED blink for a very short time and have a pause in the chasing to reduce power consumption.

AND - will it be possible to run two LEDs off of 2-3 pins instead of just one ?

You can connect as many LEDs in series and driven from each output pin as their total voltage and the supply voltage will allow.