XR2206 on 12v

adambee7 · Joined: Apr 04, 2009 Posts: 420 Location: united kingdom

Hi guys, and a happy new year. Just wanted to know if anyone had joy running this on 12v. looking at the schematic there are a couple of voltage dividers and other resistors R43, R44, R38 and R12. Which ones need adjustment really. The dividers R13,14 along with resistors R20,21 seems important as this set output amplitude of sine/tri?? Any help would be appreciated. I took note on Scotts site about R21 adjustment for amplitude of sine wave. Oh and the diode correction. cheers. Very Happy

gwaidan · Joined: Mar 07, 2009 Posts: 53 Location: Sydney, Australia

FWIW I am building a dual one in Euro format using Magic Smoke boards, and the first test is that everything works fine at 12V, except the Skew pot won't make it all the way to the saw waveform, and the Rampoid has a large positive voltage offset. All else works as it does for 15V.

MirlitronOne · Posted: Mon May 02, 2011 4:16 pm Post subject:

Finally got my XR2206 running yesterday after a few teething troubles (duff chip). Mine now works perfectly at +/- 12V, including skew and rampoid range, and even tuned up to 1V / oct without changing any components.