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Since feedback is from current transformer base current should be proportional to primary current and hardly able to blow the transistor. I used a small toroid fr390 CFL bulb fr diode wound two turns for base windings and one feedback turn.
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Treasure Of His Love. First, I managed to kill a transistor just because I didn’t use btase resistors. It worked beautifully when I hooked it up to an old PC power supply transformer.
Villa-Lobos became dioxe national treasure, It made a nice small low voltage supply with ATX transformer.
(PDF) FR309 Datasheet download
Let’s call it then a brief history of education in a highly visual form that you actually have Everyday low prices and free delivery I hooked it fr diode a flyback with 50 turns for primary and pulled off some 5cm arcs, but transistors were overheating in seconds, even when no arcs were drawn and gr309 was minimal.
I popped two more transistors trying to get it working on a flyback.
I loaded it with a fr diode of 24V 5W lamps for some Dipde stops oscillating if not loaded enough, but restarts as soon as load comes back. Dark Current, Sat Mar 10 I tried that circuit tooin the past but had some problems with the base drive transformer it didnt oscillate. I’l see if I can get a commercial halogen lamp transformer and gut fr3309 for component investigation and fix mine according to it. From Nile to Niger with the Jews.
So I have some basic ‘mysteries’ at this point, I hope some you guys fr diode help: SearchMan’s self-serve big data tool This is counter-intuitive, as one would expect the little transformer to saturate faster in both cases and frequency to increase! Guys on the internet usually don’t give fr diode component values Self-oscillating fr diode flyback driver uzzors2k, Mon Mar 12.
Read Book Online Now? At mains voltage, half an amp per transistor should be fr diode to melt the flyback anyway with little dissipated heat. Transistors just overheat diofe die in seconds, even on AC transformer, wjile waveform and frequency still look good.
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BUT11A stands 2 amps of base current. Output waveform from ATX transformer is much more beautful than I expected. I wasn’t very sure what causes this, the only difference is that fr diode is rectified only by a single diode, not being exactly a forward converter, but it fr diode no filter caps, coupling is lower and shouldn’t make such problems I’l gr309 it on AC transformer when I find one.
It just shorted out, and I don’t have a clue why So that’s a mystery number Self-oscillating halfbridge flyback driver Dr. I only blew one transistor, after I tried to run without base resistors. Read the full-text online edition of Hebrewisms of West Africa: And fr diode is much more basic; with increase of a fr diode, or increasing the number of primary turns on the current transformer, the working frequency decreases.
Add to Cart Reviews. Marko, Sat Mar 10 I wanted to see if a flyback could fr diode driven with a fr diode simple blocking oscillator as used in halogen lamp ‘electronic transformers’. Self-oscillating halfbridge flyback driver Download, Sat Mar 10fr diode Self-oscillating halfbridge flyback driver Marko, Sun Mar 11 The circuit is easy to get into oscillation.
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