I keep looking but from experience I find so much success here. I believe this is pretty basic so here it is. Imagine a circle of 32 LEDs. If displayed/spaced correctly 4 of the LEDs one at each cardinal direction, will be present. I’d like the 4 LEDs at these locations to go on then the next 4 to the right of those 4 just lighted to go on etc, around the circle continuing while powered. A 4 LED chaser. To reiterate 4 on then off, next 4 to the right on then off, etc. I also want to control the speed of the effect.
Any help welcome, Thank You

 

A microcontroller or a CD4017 is usually used as a chaser. 4 parallel LEDs will need a transistor for driving their current. Any clocking oscillator can be used.

 

I just posted some code here.

This can be the starting point for a chaser of any size, with any pattern, and 16M independent colors.

 

A microcontroller or a CD4017 is usually used as a chaser. 4 parallel LEDs will need a transistor for driving their current. Any clocking oscillator can be used.

I get your suggestion…. Could I get a pointer of how the output from the 4017 is going to a transistor?

 

I get your suggestion…. Could I get a pointer of how the output from the 4017 is going to a transistor?

I’m thinking an output from the 4017 goes to base of 2N3904 then emitter to anode of led then collector to Vcc. Cathode of led to ground. 4 parallel LEDs off one transistor. Not positive if transistor base need a current limiting resistor? ?

 

I’m thinking an output from the 4017 goes to base of 2N3904 then emitter to anode of led then collector to Vcc. Cathode of led to ground. 4 parallel LEDs off one transistor. Not positive if transistor base need a current limiting resistor? ?

EDIT: CD4017 can't actually source 4mA, but I did saturation tests on two randomly selected (and 5 other types) and all saturated at higher assumed betas.