Compact Fluorescent Schematic
Has anyone ever autopsied a compact fluorescent bulb (CFL) and derived
the schematic? I have a failed GE 13 watt - 180 ma CFL in front of me that has about 25 components including what appears to be a full-wave bridge rectifier, and capacitor (5 components), a choke, a transformer, two three-terminal devices that I assume must be transistors driving the transformer, and several resistors and capacitors. There also appears to be a mini-fuse in the hot lead coming from the base of the lamp. I know that is good, also the bridge rectifier is working. No signs of any oscillation from the rest of the circuit. No markings whatsoever on either of the transistors. A schematic, even a generic, would make looking at this thing reasonable when I get some spare time, otherwise it is into the garbage in a plastic bag to contain any mercury in the lamp. Bob Hofmann |
Compact Fluorescent Schematic
On Oct 17, 12:06*am, Franc Zabkar wrote:
On Thu, 16 Oct 2008 21:26:03 -0700 (PDT), "hr(bob) " put finger to keyboard and composed: Has anyone ever autopsied a compact fluorescent bulb (CFL) and derived the schematic? *I have a failed GE 13 watt - 180 ma CFL in front of me that has about 25 components including what appears to be a full-wave bridge rectifier, and capacitor (5 components), a choke, a transformer, two three-terminal devices that I assume must be transistors driving the transformer, and *several resistors and capacitors. There also appears to be a mini-fuse in the hot lead coming from the base of the lamp. *I know that is good, also the bridge rectifier is working. *No signs of any oscillation from the rest of the circuit. *No markings whatsoever on either of the transistors. *A schematic, even a generic, would make looking at this thing reasonable when I get some spare time, otherwise it is into the garbage in a plastic bag to contain any mercury in the lamp. Bob Hofmann This page has several reverse engineered CFL circuits: *http://www.pavouk.org/hw/lamp/en_index.html - Franc Zabkar -- Please remove one 'i' from my address when replying by email. Meat Plow and Franc: Thanks much, that is just what I was looking for. Bob Hofmann |
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