This two transistor LED flasher circuit is an easy to build circuit for beginners in electronics. Find the circuit diagram at the above link. Want to learn how to build electronic circuits on breadboard? Follow the Start Electronics Now series of tutorials.
A permanent circuit can be built on stripboard. A dedicated printed circuit board will not be needed when using stripboard. Components are soldered onto the stripboard and connected together by the tracks under the stripboard and wires on top. Tracks can be broken where needed using a drill bit.
Tutorial 8 is a two transistor, two LED flasher. The two LEDs flash on and off alternately.
Use a 555 timer IC to build a breadboard circuit that flashes an LED on an off.