How to flash led without arduino or 555 ic

6v6gt:
It's a bit late now, but this appears to be the OP's device together with a specification. Apologies if I am repeating something already buried in the thread.
There is even some Arduino code to drive it :slight_smile:

That looks like it, or pretty close.
He's not using code to drive it though. This is an Arduino-free project. :frowning: