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Lesson 3: Blink LEDs With Transistors (Astable
Multivibrator)
3.1 Overview
In this lesson we are going to flash two LEDs without push buttons.
3.2 Components Required
1 x Breadboard Power Supply
1 x 9V Battery
1 x 9V Battery Connector
1 x Breadboard 830p
2 x 5mm red LED
2 x 220 Ω resistor
2 x 100 KΩ resistor
2 x 2N2222 NPN Transistor
2 x 10 uF Capacitor
6 x M-M wires (Male to Male jumper wires)
3.3 Component Introduction
Transistor
A transistor is a semiconductor device used to amplify or switch electronic signals and electrical
power. It is composed of semiconductor material with three terminals.
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