Hello,

I'm hoping to create a small throwable piece that, on impact, turns on an LED. A perfect example are these throwable bean bags:

http://www.glowcity.com/Light-Up-LED-Bean-Bags-p/cornhole_beanbags.htm

I bought one to see how it works, and while it's a fairly simple thing one of the components has me lost. Here's a photo of it:

Closeup:

It's basically 3 watch batteries (1.5v each), a circuit board, an LED, one resistor (you can see it on the other side of the LED in the photo), and the small black "blob" for lack of a better word. Any thoughts on what's under that black stuff, how it works, and/or how I might replicate something like it? It somehow senses an impact, allows current through the LED for 30 seconds, and then stops the current flow.

Any thoughts/suggestions on what it is? Thanks for any assistance!

 

Unfortunately there's a custom microprocessor under that blob. To replicate its functions would require a few components and would overall be much larger.

If you just want a couple of these things, I'd use the one you can buy.

 

I thought that might be the case, thanks for your assistance.