Simple Led Flashing Circuit - Sponsored by Farnell.com

You like playing around with Leds? Then build a simple Led flashing circuit!

You want more? Read more after the break!

This post was sponsored by Farnell.

I got all the parts I needed from www.farnell.com. Check out the links next to the components!

• 100R   Resistor
• 1K   Resistor
• 2N2222   Transistor
• 330 uF   Capacitor
• Led

The capacitor value isn't critical. A lower value will result in faster oscillation and shorter flashes. The 2N2222 NPN transistor seems to work reliably in this circuit. Other transistors may be more temperamental, and others might not work at all. 

This is the circuit:

 

After soldering everything together it should look like this:

And here's a little video where you can see the Led flashing with a high frequency: