Basic astable circuit.

@BigWhig

11 years ago

https://everycircuit.com/circuit/6333149932945408

From Forrest M. Mims Engineer's Notebook Volume 3. Time on = 0.693 x (Rtop + Rbottom) x C. Time off = 0.693 x Rbottom x C. Frequency = 1.44 / ((Rtop + 2 x Rbottom) x C).