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Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
i made 220V AC to 12V DC 5A SMPS based on UC3842 using forward converter. schematic attached. supply's output voltage is ok and on no load (except indication led) pwm duty cycle is 1.1% with no mosfet heating (IRF740), but when loaded with even a little load of < 500mA, mosfet heats up although...
Hello All,
I have an electromagnet made from a Microwave oven transformer.
I am only using the coil with the thicker wire.
I've separated the transformer core into the "E" shaped bit and the "keeper" shaped bit and removed the other coil.
When I turn the current off, I would like the attractive...
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