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ramesh
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Join Date: Oct 2006
Posts: 3

Circuit

08/08/2007 10:41 AM

Hi, I would like the circuit for the following

input=0-40v sin wave(4Hz-15Hz)

output=0-40v squere wave(4Hz-15Hz)

Please help me
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user-deleted-1105
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Popular Science - Weaponology - New Member United Kingdom - Member - New Member

Join Date: May 2007
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#1

Re: circuit

08/08/2007 10:46 AM

Is this for power or as a signal..

If it is just as a signal...Amplify it and then chop off the top and bottom of the waveform with zenners (crude dirty way) Or slap it into an op amp with some positive feed back, again you will have to limit the excursion of the wave form.

If it's for power....why?

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Bill
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Technical Fields - Architecture - New Member Popular Science - Weaponology - New Member Engineering Fields - Control Engineering - New Member Engineering Fields - Electrical Engineering - New Member Engineering Fields - Electromechanical Engineering - New Member Hobbies - Fishing - New Member Hobbies - Target Shooting - New Member Hobbies - Hunting - New Member

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#2

Re: Circuit

08/09/2007 11:13 AM

Like Del asked, "Is it for power?"

If it's a low-level signal, use an optocoupler with current limiting on input circuit (40 V / 20 mA = 2000 Ohms), which won't give you exactly a square wave, but the transistor output will either be "off " or "on." If you need a square wave, the full-wave rectify the input sine wave and alternate between "on" and "off " with a flip-flop.

'Course, all bets are off if it's for power -- that's a different animal.

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Stirling Stan
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Join Date: Nov 2006
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#3

Re: Circuit

08/09/2007 8:28 PM

A Fourier Transformer will fill the bill.

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user-deleted-1105
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#4
In reply to #3

Re: Circuit

08/10/2007 3:41 AM

I use a furrier transformer, it's funnier and furrier than a Fourier !

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Shyam
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#6
In reply to #4

Re: Circuit

08/12/2007 9:37 AM

Humm. Good ideas worth patenting.

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coconutpete
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#7
In reply to #4

Re: Circuit

08/20/2007 4:43 PM

If you Wiki Furrier transformer (just for the hell of it) It comes up with Tom and Jerry

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cnpower
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#5

Re: Circuit

08/10/2007 5:14 AM

you can use a simple comparetoor, such as lm324, lm 339 etc. one input set at 20DC, another inport termianl your signal, the output will be square wave.

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Bill (1); cnpower (1); coconutpete (1); Shyam (1); Stirling Stan (1); user-deleted-1105 (2)

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