Thanks for all your help guys... Russ. -----Original Message----- From: John Mullan [mailto:jmullan@HOME.COM] Sent: Saturday, February 05, 2000 3:13 PM To: PICLIST@MITVMA.MIT.EDU Subject: Re: Driving UV-fluorescent tubes[OT] Yup, you're right, I'm wrong. Choke/Ballast in wrong spot. Oooppps. Actually pretty good from memory. Guess that's why we keep the manuals/schematics around. :) A small solid state battery circuit would be nice. Can it be done "transformerless"? Perhaps even with a 12C508 to accomplish the high frequency and switchover once "ignited". John -----Original Message----- From: Paul B. Webster VK2BZC [mailto:paulb@midcoast.com.au] Sent: Saturday, February 05, 2000 12:38 AM To: John Mullan Subject: Re: Driving UV-fluorescent tubes[OT] Hello John. Your reply was to me, not the list. Fortunately perhaps! > ----- starter ---- choke ---- > | | > | | > | -------------------------- | > --| Filiment Filament |-- > --| |-- > | -------------------------- | > | | > | | > -----------> mains <----------- > If I got it wrong, let me know Umm, you did in fact get it wrong. > but this circuit is used in all the machines at work. ( Slot Machines > at Casino ) No, it isn't. See the circuit by Mike Harrison earlier today. It's the correct one. Wagner's page is even more graphic: http://www.ustr.net/electronics/fluorescent.htm Trust Wagner! -- Cheers, Paul B.