Hulda Clark Zapper Schematic 30 kHz and 1000 Hz

30 kHz (with 1 kHz Adjustment) Hulda Clark Zapper Schematic

The Zapper Kit has all the parts required to build a 30 kHz or 1 kHz circuit including step by step instructions.

Zapper Kit
Two Copper Pipe Handles
North Pole Speaker
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2500 Hz Zapper Variation

Click here for a free PDF list of 67 different frequency variations from 14 Hz to 214 kHz using our Breadboard Zapper Kit along with the Radio Shack 500 Resistor Assortment.

It is easy to create a variation of the breadboard zapper by changing the R2 resistor in the schematic above. You are not limited to only the 30 kHz and 1 kHz as published by Dr. Hulda Clark.

To experiment with many different frequencies when building a Zapper Breadboard Kit, all you would need is the Radio Shack 500-Piece 1/4-Watt Carbon-Film Resistor Assortment #271-312 and a Multi Meter with Hz setting to test frequency output.

If you have already built the 30 kHz Zapper Kit, start by removing the 4.7k (yellow-violet-red-gold) resistor that connects pin 6-7 of the 555 CMOS Timer on our Breadboard Kit at G9-J10, and replace it with other resistors from the 500 piece assortment.

For instance, to make the output approximately 2500 Hz (also written as 2.5 kHz) use a 68k (blue-gray-orange-gold) resistor or a 56k (green-blue-orange-gold) resistor to get close. A 62k resistor would work best, but it's not included in the Radio Shack Resistor Assortment.

Here's a nifty trick:
When you place two of the same resistors in parallel divide their individual number by two. To create a 60k resistor you would need to use two 120k (brown-red-yellow-gold) resistors placed in parallel for a Zapper output of 2500Hz. Place the first 120k resistor between G9-I10 and the other between H9-J10 for a Zapper circuit with 2500 Hz output.

A Hulda Clark Zapper is defined by Dr. Clark as any square wave frequency from 10 Hz to 500,000 Hz, with 50% duty cycle, powered by a 9 volt battery, using copper handle electrodes, and at least 1/4 volt Positive Offset (meaning no negative output, and no negative spikes). Regardless of frequency, the wave form must be all positive, and the 39k resistor at R5 does the job of keeping the output Positive Offset. As long as the only resistor you change is the R2, you should be good.

Directions to build the 1000 Hz Zappicator circuit

Containment Ideas, and the Zap Kit FAQ list

For individual electronic parts visit:

Don't want to build your own? Check out the Dual Frequency Hulda Clark Zapper by Frequency Generation

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The Hulda Clark Zapper is not licensed by the Food and Drug Administration for use in the cure, mitigation, treatment, or prevention of any disease in humans or animals. The Clark Zapper can only be sold as an experimental device. If you are pregnant or wearing a pacemaker, please do not experiment with a zapper. All information is for educational purposes only. Consult a licensed health professional before attempting any self health program. For more information on how to build and use the zapper, please read the books by Dr. Hulda Clark.

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