Some 1.5 v LED flasher circuits are available on the internet and we like to present you four of them. The flasher circuits below operate on a single 1.5 volt battery. The circuit on the upper uses ...

This circuit is not complex, but it saved the day in an application ... It shows the main-clock input; the delay and duration potentiometers, P 1 and P 2; and the HB-LED output.