Any way to create a 3 LED chaser with only a 555 IC?
This could be done, but it would be a lot simpler to just get a shift register IC or small microcontroller. The schematic would be quite large, and I'm not going to design it for you. Here is a block diagram and some things to research.







simulate this circuit &ndash; Schematic created using CircuitLab

First, a square wave is fed into an integrator to generate a triangle wave. The triangle wave is sent to 3 window comparators. You can adjust the windows and square wave frequency to get the desired chase.