Years ago there was a guy that made these tingle toys. They operate off a 9V battery and deliver anywhere from a mild tingle to a pretty good shock, depending on the "Intensity" knob. The frequency of the DC pulse is also adjustable depending on the "Speed" knob. This guy is no longer around, but I want to make a couple more of these toys.
I have the whole thing drawn out and I've identified all the components except for the transformer. It's an ecapsulated PCB mounted transformer with no markings at all. All I know about it is the DC resistance values for the primary and secondary. The primary is 18.4 ohms with a center tap, the secondary is 3.2k ohms.
Here's a quick sketch of the circuit:
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The square wave is generated by a standard 555 circuit, then fed into a hex inverter chip, then to the transistors. It is low voltage and only serves to switch the transistors. The 9V supply comes in on the center tap. I really have no way to accurately measure the output voltage or amperage without a scope. With a multimeter on the DC setting it reads about 1.5V @ -76mA, but I don't think that means much in this case.
The transformer itself looks like this:
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Could this be just a standard 12.6VAC transformer wired up "backwards"?? Any suggestions on where I can order one for PCB mount (part numbers, URLs)??
Dave