ES-04A    4 LED Flasher Kit    (DC 6 ~ 9V)


This kit demonstrates the operation of transistor-transistor astable flip-flop. Each transistor drives 2 LEDs in series  alternately.  Flashing rate can be changed by using different values of the electrolytic capacitors ( C1 & C2) . Runs on 9V battery. Can also operate from 6V supply but with lower LED brightness.
    We sold thousands of these kits to schools. A great starter kit for beginners to learn soldering & reading schematic.




 

Sold without 9V battery.   Battery clip included.

CLICK THIS LINK TO LEARN HOW A TRANSISTOR ASTABLE
 FLIP-FLOP WORKS

How transistor astable circuit works --- (1
How transistor astable circuit works --- (2)