Original poster: "Jason by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jasonp-at-btinternet-dot-com> Hi all, Until recently I assumed dimmers were just variable resistors that were used to change Vin. Obvisly I am wrong :) Could someone send me or post up a technical explanation of how they work? A circuit diag would be good too :) Thanks, Jason