Transistor astable circuit

This circuit uses two transistors that switch on and off due to the delay created from the capacitors and 47k resistors. Electricity will slowly discharge through the resistors and will be stored in the capacitors for a short period of time. After this time has expired the transistor will connect the LED to the power supply thus lighting it up. The cycle will then repeat and the time delay created between each flash of the LED will cause the LEDs to flash on and off.

Component List

• 2 2.2nf Electrolytic Capacitors
• 2 330 ohm resistors
• 2 47k ohm resistors
• 2 Red LEDs
• 2 2N2222 transistors- or similar
• 9V power supply e.g PP3 battery
• Breadboard or similar

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