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Can Anyone Explain This Circuit?


blksith0

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This came out of a lighter. You would press the button down to generate the spark and it would also makes these LEDs flash. What I don't understand is, how does the piezo sparker activate this circuit from over 1 inch away?
You can press the sparker anywhere along that circuit within a 1.5 inch radius and it starts, even if no spark is made. So how is this happening?

http://www.youtube.com/watch?v=k3OI7hWS2Cs
7Lo8hK3.jpg

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I saw this same question about 1 minute ago on another website.
The spark makes fairly powerful local RF energy. A simple AM radio circuit (maybe a simple crystal radio) picks it up and flashes the LEDs.


It's an easy way to find out which community is better (you guys win).

And thanks for the answer. I didn't know you could fit an AM radio circuit in something that small.
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