This voltage-booster circuit for driving one or more white LEDs uses a 555 timer as its main element (see the figure). The timer, IC1, functions as a resettable astable multivibrator where R1, R2, and ...

This is a simple circuit named 555 Timer IC Testing circuit which helps in testing a circuit using 555 Timer IC.This is a simple circuit named 555 Timer IC Testing circuit which helps in testing a ...