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Author Topic: RC Circuit  (Read 6525 times)

Offline raburgeson

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RC Circuit
« on: September 15, 2006, 01:10:11 AM »
What is the best and cheapest way to beat a square ware out of a rc circuit? Looks like the best way to lick some getting to the frequency problems. Transistors are to slow and weak there has got to be another way.

Free Energy | searching for free energy and discussing free energy

RC Circuit
« on: September 15, 2006, 01:10:11 AM »

Offline dingbat

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Re: RC Circuit
« Reply #1 on: September 15, 2006, 01:27:11 AM »
rc circuit is no way to produce a square wave.  rc circuit is by nature a filter.  a filter will destroy square waves, not make them.

Offline hartiberlin

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Re: RC Circuit
« Reply #2 on: September 15, 2006, 02:25:49 AM »
Get a 4069 hex Schmitt Trigger inverter IC and then you only need
one RC unit to build a working square wave generator.

Free Energy | searching for free energy and discussing free energy

Re: RC Circuit
« Reply #2 on: September 15, 2006, 02:25:49 AM »
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Offline gyulasun

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Re: RC Circuit
« Reply #3 on: September 15, 2006, 02:33:03 PM »
What is the best and cheapest way to beat a square ware out of a rc circuit? Looks like the best way to lick some getting to the frequency problems. Transistors are to slow and weak there has got to be another way.

Hi,

If you are happy with about 4nsec rise and fall times, then consider building this simple circuit from EDN magazine Design Ideas section, see the attachment . I mean the second article "High-speed pulse generator has programmable levels". 

Sorry if this circuit is totally different from your original imagination (you have not included much detail on your square wave needs).

Regards
Gyula

Offline raburgeson

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Re: RC Circuit
« Reply #4 on: September 16, 2006, 01:34:19 AM »
I'm sorry, I'm trying to switch 40,000 VDC at a high frequency and was thinking about Tesla and cheap switching but then he used the sawtooth and I need the square wave. I only need a wave square enough to generate harmonics and am hoping someone thinks of a way I've forgotten about.

Free Energy | searching for free energy and discussing free energy

Re: RC Circuit
« Reply #4 on: September 16, 2006, 01:34:19 AM »
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Offline Jdo300

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Re: RC Circuit
« Reply #5 on: September 16, 2006, 03:25:41 AM »
Get a 4069 hex Schmitt Trigger inverter IC and then you only need
one RC unit to build a working square wave generator.

Hi Stefan,

I am also trying to make a switching circuit to turn on and off mosfets to switch the voltage from some caps over a coil. Do you know of any good websites that explain how to use the IC?

Offline bitRAKE

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Re: RC Circuit
« Reply #6 on: September 16, 2006, 03:52:51 AM »
Since this is the half-baked area of the site: how about a Marx bank for fast high voltage switching? ???

Free Energy | searching for free energy and discussing free energy

Re: RC Circuit
« Reply #6 on: September 16, 2006, 03:52:51 AM »
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Offline raburgeson

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Re: RC Circuit
« Reply #7 on: September 17, 2006, 07:54:05 AM »
I just tried a marx bank, It cascaded my mosfets, The fets can't take it- Oh bum. An alternator stator might be custom wired to pulse controlled by the speed of the alternator. I'll look at it, don't see any reason why it can't be done. But first I have to check my present circuit on water, I have decided I need to change over to stainless screen to get more surface area and am having a problem finding the screen.
In Super Capacitors abbarue posted a cap diode maybe in stead of a mosfet? And I am still looking at clipping the sawtooth of a rc, hope this generates harmonics.

Most of the circuits we are investigating are high freq. or high v or both. The government and big business know many of the secrets we are trying to find. They do not want us discovering these and have suppressed componets that can handle the required voltage and frequencies, have no doult government and big business have solid state devices that do exactly what we need to do and this devices are hidden so we have to find ways without them. This will include developing our own components and work arounds. Limiting what our circuits do by using what is availible is stopping us. I for one am not going to let them hold knowledge from me forever just out of reach. This is a simple thing generate power with a coil it has to be done. A power supply is the most basic need for any serious experimenter and all of you must realise how important it is to be able to deliver any required souce voltage and frequency at a matchable impedence.
« Last Edit: September 17, 2006, 09:20:20 AM by raburgeson »

Offline zenarrow

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Re: RC Circuit
« Reply #8 on: June 26, 2008, 08:29:24 PM »
I noted the date is a little old on here from 2006, but just something I thought worth mentioning.
If you are pulsing into a coil, you will get a back EMF when the field collapses from DC pulses (square waves, saw tooths etc) A back EMF in itself is more powerful than the field building up initially, as it collapses instantly. This is when the points fire in a car, when the field collapses. Great for making a zapper too. And even with it for a zapper, a capacitor is used across the points to reduce wear, and also gives a bigger zap result.

The point I want to make here is that most circuits pulsing to coils, have a protection diode to stop the back EMF, as it fires Mosfets and transistors. Even 5VDC relays in electronic circuits have a diode in reverse polarity across the coil, so as to short out the back EMF.

Otherwise a MOSFET fried and other electronics can be an expensive mistake.
I often find a circuit may seem easy in concept in theory, but ends up with a lot of protection and voltage stablization extras. IE switching transisters need to be biased to turn off otherwise atmospheric conditions on a humid day can turn them on, stuff like that.


Free Energy | searching for free energy and discussing free energy

Re: RC Circuit
« Reply #8 on: June 26, 2008, 08:29:24 PM »
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