Electronics > Open Source Hardware

Open Source Electronic Ballast

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ResR:
Is there any open source schematic for a 2x36W T8 fluorescent lamp electronic ballast? I have a lot of improving ideas, including higher voltage capacitors and bigger heatsinks for 1300x transistors, but i'm little bit worried for getting sued by reverse engineering bad ballast and improving that to make it better. I have seen and taken apart a lot of ballast from all sort of companies where the main capacitor is overvolted, like 385VDC on a 250VDC electrolytic capacitor and t8 bulbs outlived the ballast almost all the time.

ddavidebor:
Sincerely, R.E. Some ballast, next kill them, next found what is dead and inprove it.

I think is the easiest way to do it

ResR:
Luckily I have one specimen from Far East Electronics to play with :D Bad or overvolted caps at the power source side plus one creepage problem already solved by scraping it off and replacing with 500V 22AWG isolated wire from broken tape recorder. My brother thought it was illegal to R.E. the ballast like that.

duskglow:
I love how the silkscreen for the capacitors looks like the astrological symbol for "woman", or "venus".

peter.mitchell:

--- Quote from: duskglow on July 06, 2013, 02:46:23 pm ---I love how the silkscreen for the capacitors looks like the astrological symbol for "woman", or "venus".

--- End quote ---

"Theres yer prawblem"

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