SURE!

First off: We make specilized precision Welding equipment
http://www.microjoin.com
which are really special power supplies.

That's (basically) what I did.  Creating an arbitary
waveform based on an interrupt driven state machine.
I suppose you could use an internal ADC.  But I used
an external 14 bit Burr-Brown device with a 4 bit
parallel interface.

Using a PIC with lotsa I/O and running up around 30MHZ,
you really need almost no glue.  My update rate is
40us.  Was shorter but since we control a machine
there is more I/O to handle than just generating
a waveform.

You can write a waveform generator in easy
enough.  Just getting the state machine info
into is the hard part.

GL,
Walt....

-----Original Message-----
From: Mike M [mailto:elektrikman@DYNAMITEMAIL.COM]
Sent: Thursday, November 18, 1999 3:27 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: PIC-Based Bench Power Supply


>I should warn you,though, that the PIC doesn't CONTROL
> the voltage, it just measures it.

So basically its the voltage measuring part of a digital multimeter.
Ever think or anyone ever try to build a signal generator using a PIC?

On Thu, 18 Nov 1999 17:53:34 -0500 Sean Breheny .<shb7@CORNELL.EDU>
wrote:
>Hi Lawrence,
>
>Great! I suppose  It is a traditional dual linear regulated
>supply with a 16C71 and an LCD added to monitor the voltage.
>
>Perhaps it would have been better to go with a switching supply, but I
had
>already started the linear regulator design when peopl suggested it.
>
>Sean
>
>At 04:17 PM 11/18/99 -0600, you wrote:
>>Sean, I've been thinking about a PIC based power supply for years.
I'll be
>>interested to see how you did it.  Maybe I'll build one.
>>
>>-- Lawrence Lile
>>
>>
>
>|
>| Sean Breheny
>| Amateur Radio Callsign: KA3YXM
>| Electrical Engineering Student
>\--------------=----------------
>Save lives, please look at http://www.all.org
>Personal page: http://www.people.cornell.edu/pages/shb7
>mailto:shb7@cornell.edu ICQ #: 3329174
>

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