I have added file MVI_0759.MP4 which is a short movie showing the effect of varying the supply voltage to a Wogglebug module using a variable transformer or Variac. This same technique should apply to all the various versions of the Wogglebug currently out in the field (up to around 1000 now with Euro-rack version and the kit boards). Using a Variac to vary the power supply was one of the techniques used by the Barron's in their original work with phase locked loops.
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New Wogglebug Movie file posted
2010-12-06 by Grant