Electrical Engineering Stack Exchange is a question and answer site for electronics and electrical engineering professionals, students, and enthusiasts. It only takes a minute to sign up.
Sign up to join this community
I have bought a shocking gum which gives a small electric shock when you pull a side, like this one : http://img.weiku.com/waterpicture/2011/10/31/20/Shock_Chewing_Gum_634577515693532881_3.jpg
I wanted to know how it works so i opened it and there are two components i can't identify.
Here is the picture :
It's the black component (maybe a capacitor ?) and the little circular one I can't identiy. Any ideas ?
If you mean that round white thing- that's an interesting question. I'm guessing it might be an ultrasonic (or maybe high frequency sonic) piezo element that resonates with the black cylindrical drum-wound autotransformer or inductor or tapped inductor (some inductors have an extra leg for support that is non-functional electrically).
The inductor looks like a ferrite bobbin wound with wire, but it's got a length of black shrink-wrap tubing over it to protect the windings.
Here's a typical inductor of this type:
Then you'd only need perhaps a single cheap transistor and maybe a resistor to generate the 'joke' electrical shocks.
The black cylindrical thing at top is some sort of inductive component. Since it seems to have 3 pins, it is probably a small auto-transformer. That would also make sense considering this device is apparently meant to produce short high-voltage pulses.
The silvery circular thing under the clip is most likely the battery.
