This is a small size led flasher built with the 555 timer IC that is powered from 2 x 1.5V batteries. The circuit can be used as a flashing metronome, dark room timer, memo-reminder or other similar ...

When the input is 1.25 V and the LEDs are connected, the voltage pulse level will be 23V. The LED driver uses a CMOS 555 timer since it operated with low voltages and can work for about 190 hours when ...

The 555 timer is one of the most versatile integrated circuits available. It can generate PWM signals, tones, and single-shot pulses. You can even put one in a bi-stable mode similar to a flip flop.