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Independend BEC circuit diagram

Old 08-22-2008, 06:04 PM
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Join Date: Jun 2008
Posts: 641
Default Independend BEC circuit diagram

Ok, im back in busines with my F-20 project, since im avaiting wing materials to build new wings for my extra.
I got a new 120 A regulator now, but there is a slight problem.
This regulator doesnt have BEC, and im already carrying more than enough weight in batteries so i dont want even more. Especially not since the big nose is the only place to put anything in this plane, and it is nose heavy enough as it is.
So, i searched through my archives and found an old charge voltage regulator i made for my moped 100 years ago.
Anyway, its just what i need and with some modifications (mainly to reduce size and weight), it will be perfect for the job. The more advanced user could add a triangle wave voltage reference, elevated to the correct DC voltage at the opamp negative input terminal to get a switching power supply (much more efficent and powerful), but its also creating a lot of noise in the voltage wich could set the reciever off course, so i didnt bother do to that.

Anyway, if anybody else had the same problem, im going to post the circuit diagram here. Its really simple so anyone who can solder and read schematics can do it. I noticed that the bigger regulators rarely come with integradted BEC, for some stupid reason i cant understand.

here is the schematic
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