> http://www.electro-tech-online.com/attachments/microcontrollers/32974d125=
1452611-digital-control-voltage-using-lm317-adjusting-regulator-output-digi=
tally.gif

Thanks. I also Googled. Didn't find much apart from your link and

http://www.electro-tech-online.com/attachments/electronic-projects-design-i=
deas-reviews/18890d1209004583-lm317-control-pic-mcu-lm317.png

Will have to try them and see

Joe=20

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