Cancer cure, but FDA and doctors would rather have your cash and not the cure.

[amigo]

Hi Guys,
I put together the simple zapper at this link a couple of times, but I couldn't seem to get a square wave - all I got was a sawtooth wave:
http://www.zapperplans.com/plans.html
Any suggestions? 
B

Hi,

Just look around the net, there are tons of square wave gen circuits with schmitt triggers, using 7414, 4069, 40106...and they allow for adjustable pulse width and frequency.

[professor]

Hi Guys,
I put together the simple zapper at this link a couple of times, but I couldn't seem to get a square wave - all I got was a sawtooth wave:
http://www.zapperplans.com/plans.html
Any suggestions? 
B

Without having looked at your circuit  I just want to show you one very stable circuit that puts out a variety of waveforms.
If you are loading a circuit or in the case of the LM358 you can introduce stray capacitances which effects the waveshape of these circuits as I tried to explain to Amigo being the reason to put a buffer at the output of inverting opamp.
Any loading from the probes will not result in any changes to the circuit it is common practice to do so in electronics whether analog ,RF or digital.   

[professor]

Hi professor,

What forest? Trees? Where? All I see around me is a concrete jungle, condos going up faster than mushrooms after the rain.

So basically we only use pin 1 and 3 on the connector as described in the schematic, each leading to an electrode?

What would this transistor buffer do though? Wouldn't Beck put one there himself?

I have this vague recollection of reading something about necessity to have high impedance going to the skin/electrodes and that using tubes would be a preferred way to using transistors or modern IC, as tubes provide this kind of output. Beats me as tubes were well before my time...

We still have some trees left, very few though as the Pine Beetle got most of them.
Right now we have more snow than Trees and its bloody cold for Feb.
Where is the Global Warming? I guess it is in Australia. We bitch about the cold but at least you can do something about it.
As far as impedances is concerned you can use mosfets if you think that is better.
Configuring your bipolar transistor i.e. Common base for instance will lower your input Emitter impedance while I yhink raises the collector output dont quote me on that one as I go on far memory.
Tubes yes I am most familiar with I guess that shows my age but there are only few to be had.
Since the Plate voltage of tubes is very high it's not something you want to mess with.
Using the cathode you have low impedance and if your Cathode Resistor opens up you get fried.
Dont even think about it!
Remember that it is a DC current that does all the work  the Voltage needs to be high enough to introduce a current flow through the tissue then entering the bloodvessel and the Blood.
Some of us have thick skin ...LOL.... and the current needs to be cranked up.If you do that directly from the output of the LM358 you may load it to the point of failure or distortion or change in frequency as it feeds the output back into the input with a buffer that would be no problem.Hope I made myself clear  English being my second language my explanation lacks the right wording.
professor

[b0rg13]

http://www.youtube.com/watch?v=ROZXOKejcpc

..this is just sad.

[amigo]

We still have some trees left, very few though as the Pine Beetle got most of them.
Right now we have more snow than Trees and its bloody cold for Feb.
Where is the Global Warming? I guess it is in Australia. We bitch about the cold but at least you can do something about it.
As far as impedances is concerned you can use mosfets if you think that is better.
Configuring your bipolar transistor i.e. Common base for instance will lower your input Emitter impedance while I yhink raises the collector output dont quote me on that one as I go on far memory.
Tubes yes I am most familiar with I guess that shows my age but there are only few to be had.
Since the Plate voltage of tubes is very high it's not something you want to mess with.
Using the cathode you have low impedance and if your Cathode Resistor opens up you get fried.
Dont even think about it!
Remember that it is a DC current that does all the work  the Voltage needs to be high enough to introduce a current flow through the tissue then entering the bloodvessel and the Blood.
Some of us have thick skin ...LOL.... and the current needs to be cranked up.If you do that directly from the output of the LM358 you may load it to the point of failure or distortion or change in frequency as it feeds the output back into the input with a buffer that would be no problem.Hope I made myself clear  English being my second language my explanation lacks the right wording.
professor

Ah but it's not "Global Warming" anymore, it's "Climate Change" so now it covers any possibility and they'll always be right, hehe.
It was a nice and cold day today and I see snow for the next week, nice. As you said the warming is in Australia...

I got the point of the buffer and the need for MOSFET for high impedance. I will stay away from tubes.

Because it is DC, it is micro-currents that need to be introduced, right? Have you ever found a place where they talk about the necessary voltage to penetrate specific layers of the skin. We still need to somehow figure out the threshold for the blood electrolysis and stay the heck away from it...

Your ingrish is just fine.

Thanks.