Re: Tuning a tesla coil without high voltage power

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi Jolyon,

Sure!  Maybe just use a driver chip like the TLP250 for 1/2 amp of drive:

http://hot-streamer-dot-com/temp/TLP250.pdf

DigiKey has them for a few dollars.  Or the LM12CLK:

http://hot-streamer-dot-com/TeslaCoils/Misc/Low-ZAmp/LM12CL.pdf

The circuit is the 50% duty cycle oscillator taken right out of the LMC555
data sheet.  You can modify it in any way you wish:

http://hot-streamer-dot-com/temp/LMC555.pdf

BTW - My TCT burned up last night =:O  I quickly modified it for my OLTC
project on Sunday, and a loose part caused the battery to go directly
across the LED.  It made lots of smoke and even a puff of fire!  I think it
just needs a new LED.

Cheers,

	Terry


At 04:00 PM 8/28/2002 +0100, you wrote:
>Would it not be possible to add a complementary emitter-follower stage to
>the TCT to increase output current for test purposes -and possibly convert
>it into a genuine TC driver?
>
>----- Original Message -----
>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: <tesla-at-pupman-dot-com>
>Sent: Wednesday, August 28, 2002 3:12 PM
>Subject: Re: Tuning a tesla coil without high voltage power
>
>
>> Original poster: "tesla by way of Terry Fritz <twftesla-at-qwest-dot-net>"
><tesla-at-paradise-dot-net.nz>
>>
>> Those values I chose
>> R2  4K7
>> R3 5K
>> C3 470p
>> extra C3  470p
>> extra C3  1410pf (3 by 470p in parallel)
>> Ranges 73kHz to 146kHz
>>             137kHz to 264kHz
>>              38kHz to 77kHz
>>
>> ----- Original Message -----
>> From: "Tesla list" <tesla-at-pupman-dot-com>
>> To: <tesla-at-pupman-dot-com>
>> Sent: Wednesday, August 28, 2002 12:26 PM
>> Subject: Re: Tuning a tesla coil without high voltage power
>>
>>
>> > Original poster: "tesla by way of Terry Fritz <twftesla-at-qwest-dot-net>"
>> <tesla-at-paradise-dot-net.nz>
>> >
>> > A footnote to the TCT
>> > Very useful device
>> > A small Mod I found useful
>> > Placed on of those SPDT centre off switches to switch the value of C3 .
>> This
>> > along with slecting R2 gave me 3 slightly overlaping and bandspread
>> ranges.
>> > Can't find my circuit mods at the moment but will post if I find the
>> folder
>> > with the details.
>> > Best
>> > Ted L inNZ
>> > ----- Original Message -----
>> > From: "Tesla list" <tesla-at-pupman-dot-com>
>> > To: <tesla-at-pupman-dot-com>
>> > Sent: Wednesday, August 28, 2002 6:41 AM
>> > Subject: RE: Tuning a tesla coil without high voltage power
>> >
>> >
>> > > Original poster: "Lau, Gary by way of Terry Fritz
><twftesla-at-qwest-dot-net>"
>> > <Gary.Lau-at-hp-dot-com>
>> > >
>> > > Terry designed and documented a 555-based "Tesla Coil Tuner" that is
>> > useful
>> > > for pri-sec tuning.  It is documented at
>> > >
>> > > http://hot-streamer-dot-com/TeslaCoils/Misc/TCT/TCT.htm.
>> > >
>> > > Regards, Gary Lau
>> > > MA, USA
>> > >
>> > >  -----Original Message-----
>> > > From: Tesla list [mailto:tesla-at-pupman-dot-com]
>> > > Sent: Tuesday, August 27, 2002 10:00 AM
>> > > To: tesla-at-pupman-dot-com
>> > > Subject: Tuning a tesla coil without high voltage power
>> > >
>> > > Original poster: "Mccauley, Daniel H by way of Terry Fritz
>> > > <twftesla-at-qwest-dot-net>" <daniel.h.mccauley-at-lmco-dot-com>
>> > >
>> > >
>> > >
>> > > Is there a method of tuning a tesla coil at low power using a signal
>> > > generator or something?  I've tried searching the archives, but didn't
>> > find
>> > > anything useful.
>> > > Thanks
>> > > Dan
>> > >
>> > >
>> > >
>> > >
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