Zapper circuit build - a few questions

Recently some colleague requested me to build him a Hulda Clark style zapper device, I guess that is some sort of signal generator and pretty much easy to do but, since I'm not highly qualified in electronics, a few questions arise in me.

I found plenty of alternative zapper designs at zappers.narod.ru. I will focus on the EPE magazine design by Andy Flind:

The ICM7556 is some sort of dual 555 timer IC replacement.

Basically, by tuning the resistance between pins 5, 8 & 12 and 2 & 6 we get the resonant frequency.

To increase blasting :-) power, besides higher input voltage should I increase (C1, C2) and C4 capacitance? Nowadays pretty big ceramic caps can be obtained, so I guess replacing the C1 & C2 pair with some bigass ceramic caps should be 0K, doesn't it? Or is it much better to connect the circuit to some sort of amplifier? I guess so.

This stuff outputs some square wave pulsating DC current, 50% PWM duty cycle, is this called some other way?

Most interesting question to me right now is, how can this circuit's output frequency be measured with a cheap standard multimeter which requires zero-crossing for frequency, or some cheap frequency indicator? Maybe sticking/attaching a capacitor somewhere?

Thanks.

i guess the limit is whatever the fool holding the electrodes can take or the breakdown voltage of the chip.
caps wont increase it over 9v either.
so little measurable current unless the user sticks 1 electrode in their mouth and the other where the sun dont shine.
this device is as ridiculous as the e-meter.

555s in their usual config don’t put out 50%DC squarewaves, but only >50%.

Easiest would be the one with the 4049 (essentially a relaxation oscillator), but you can tweak the circuit so that instead of 1 output and ground, you parallel the unused inverters 2 each. Gets you double the voltage swing. That one with the 556 looks like painful overkill.

You can stick a small cap in series with the output to get the meter to read AC spikes vs on/off DC.

e-meter? What? :-))

I barely have any idea of how these things work. And honestly, the more I look at the time I'd have to spend versus the potential benefits, the less appealing this looks. }P

I think I already read some comment from HKJ, in one of his multimeter reviews, concerning how the unit used a capacitor at the input to measure the frequency of non-zero crossing waveforms. Thanks for the input Lightbringer. Wondering now how a capacitor in series allows multimeters (or similar devices) to do it, given that the signal has to (?) cross zero. :???:

Mmm...

i have repaired a few of them.
i can make it give whatever reading is beneficial for the exam.
its too easy to fool to be of any value.
in the case of the “zapper” it seems to rely on the same theory as a desulphator.
but you need more than 9v for handheld electrodes.
look at desulphator designs for something that has a chance of “working”

Plus, it’ll clean out all sulfate deposits from your blood-vessels, too!

but will it restore normal specific gravity?

Specific gravity? You speaking about flooded lead acid batteries, I guess.

Or more like making jokes? :-D

Only 3% of the time and then it might take to weeks.
C

i found a listing of the frequencies that the zapper must produce in order to treat against numerous parasites and diseases.
list of frequencies
https://www.super-ravo-zapper.com/frequencies-by-dr-hulda-clark/

Most seem to be in the 300-400kHz range.

What is the impedance of the human body say from the left hand to the right hand? i didn’t measure L, but R was 7.4 Meg and C was 0.1 uF using a handheld multimeter. i don’t have anything to measure at the high frequencies.

But it appears that the body capacitance would look like a short circuit to a HF ac signal, and so would the 10uF cap on the output of your circuit. Noticed that there was no precharge circuit for the 100uF, probably not an issue with only 9V, but not a good design practice.

i would guess that the body Resistance was in series with body Cap since we don’t see people die from handling 9V battery terminals.

Strange thing is some folks have used this on their head to treat worms and have the optic nerve disturbed such that they would be white-blinded.

This thing seems like a snake oil cure-all with followers and true believers such as found in religious organizations. It’s good for whatever ails you.

Hello! I am back, LoL! :-D

I was recently looking at a multifunctional electronic component tester device, one of these GM328A testers, and it says “PWM square wave signal generator”. In “features” the following can be read:

A standard PWM signal is a positive offset square wave, doesn't it? So it looks like that device can do what a zapper does, among lots of other things. No idea of the actual accuracy of the generated frequencies, though.

I also looked for something a lot more useable and powerful in practical terms, found the FeelTech SGP3002S in AliExpress here and there, for example (guess they call “pulse wave” to a standard PWM signal).

Do you think it makes a difference if the wave is positive offset or would a zero offset sine do the same thing? The FeelTech device has 20Vp-p (+/-10V) outputs available along with the PWM. That might be a good start for a zapper, then add an amplifier if it needs to be stronger. i don’t understand if it is the signal strength or frequency that provides the healing.

Lots of therapy devices on Ali: fetal monitors, nasal laser (660nm) massage, muscle massage, etc. Really low cost for a bunch of electronic stuff.

Did you ever figure out about the capacitor on the probe tip to measure frequency? i ran a simulation to show this and also tested it with a DMM to prove that it works.

i think C4 will cause the output to swing +/- with respect to ground since the discharge and trigger are out of phase in the chip due to the same p- and n-fet driver signal.