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Old 06-07-2017, 10:43 AM   #2 (permalink)
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That's the symbol for a full wave rectifier.
the -40 part looks to be just the voltage rating of said rectifier.
The only BYX21 data sheet i found was a BYX21-100, for a single diode rectifier, rated at 100 volts.

I'm not sure why you would want to make your own charger, unless it's just for an interesting project. You can buy an "intelligent" charger for less than you could build a simple one.

Last edited by Stubby79; 06-07-2017 at 11:04 AM..
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