At 09:07 PM 10/25/2006, Bob Axtell wrote: >Let me make it very clear: these transformerless designs are >dangerous because they operate with exposed lethal voltages. >The only reason I did the gig was because it was to be potted >in plastic.. and it was. > >It also followed the general UL principles and would pass if >tested. My versions are both CSA & UL certified. None of them are potted but they are all enclosed such that the consumer cannot touch any part of the circuit. One unit does have a pot shaft but that is plastic. Interestingly enough, one of the current generation of LED Christmas lights that I am working with uses a capacitive power supply in every single bulb. Each bulb is completely self-contained and replaces a standard C5 lamp. Reasonably bright and runs at about 0.8 Watts - but with an extremely capacitive power factor. These transformerless power supplies do have their place. dwayne -- Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax Celebrating 22 years of Engineering Innovation (1984 - 2006) .-. .-. .-. .-. .-. .-. .-. .-. .-. .- `-' `-' `-' `-' `-' `-' `-' `-' `-' Do NOT send unsolicited commercial email to this email address. This message neither grants consent to receive unsolicited commercial email nor is intended to solicit commercial email. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist