Re: Flyback Transformer Boards - Any interest ? ? ? ?

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

Original poster: "Steven Ward" <srward16-at-hotmail-dot-com> 

The resistor from pin 6 to ground will adjust the frequency and would be a 
nice modification to your driver.  I would use a 20K pot at least, 
preferably 10 turn.  You may have to add additional series resistance (at 
least a 1K to protect the 494, but also another to get the 494 in the right 
range of the flyback).

Good luck,

Steve Ward


>From: "Tesla list" <tesla-at-pupman-dot-com>
>To: tesla-at-pupman-dot-com
>Subject: Re: Flyback Transformer Boards - Any interest ? ? ? ?
>Date: Tue, 07 Oct 2003 21:26:12 -0600
>
>Original poster: "Craig Fuller" <cbfull-at-hotmail-dot-com>
>
>
>How about using a TL494 for the square wave generation on the board?  I 
>hear they're a little more solid than 555s.  The plasma globe I have right 
>now has a TL494 in it.  I would like to figure out which resistor to swap 
>out for a pot so I can adjust the frequency.
>

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