Re: PWM control
- From: Rich Grise <rich@xxxxxxxxxxx>
- Date: Wed, 30 Jul 2008 22:07:17 GMT
On Wed, 30 Jul 2008 12:10:12 -0700, Dave, I can't do that wrote:
On Jul 30, 11:27 am, "Dave, I can't do that" <davenp...@xxxxxxxxx> wrote:
Synrad did say it was controlled by a PWM signal. From their controller
manual...
Forgot to mention it is a 5kHz signal
http://www.intersil.com/data/fn/fn2867.pdf
See page 5: The first circuit is an astable that puts out your 5 KHz;
you'd want to differentiate its output (output to 1-10 nF cap, other end
of cap goes thru 10K resistor to ground AND to trigger of the monostable.
Design the monostable for a pulse width of 1.0 uS to as long as you want.
Use that to drive the PWM input, with the appropriate driver.
Good Luck!
Rich
.
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