ESCOL self assembly hobby kit ES-04A is a great starter kit for beginners to learn soldering & reading schematic. There are 3 options to choose: 1. ES-04A Only 2. ES-04A + 9V Battery 3. Add Assemble service (You still need to add to cart ES-04a Features: • 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 #Escol#ES-04A
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