LED Flasher

I made a simple LED flasher based on the schematic below. The only difference is that I used two 22kΩ resistors instead of 100k.

Parts list: LED x 2, 22kΩ x 2, 470Ω x 2, 10μF x 2, 2N3904 transistor x 2, SPDT switch x 1, 9V battery x 1.

t-flash2

2013-04-28 20.07.53

2013-04-28 20.09.49

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One thought on “LED Flasher

  1. 张肖晖

    so cool! i think you really learn a lot of totally different things in the US. I don’t know when i’ll be able to do this…

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