1. J

    MOSFET voltage booster heat and protection

    I have an IRF640 N-channel MOSFET that has no protection on the circuit, and heats up my heatsink very fast. I know I need a Zener diode to "protect" the MOSFET, but is there anything else I need, and where do I put it? CLARIFICATION: the circuit does work, but it is killing the mosfet, it heats...
  2. H

    Overheating IC - Chip on motherboard labelled 2250 EmFC overheating when plugged in to mains.

    I have a motherboard which does not charge the battery properly. When it is plugged into the mains, a chip labelled 2250 EmFC gets immensely hot. Please advise.
  3. D

    LM2567 Switching Regulator - Heat Sink required...?

    Hello I am making a power supply to power a Raspberry Pi/camera/touch screen (5V @3A), and some LEDs, servos/motors (12V LEDs and 9V servos/motors). I am using a 12V/5A adapter to supply power, and an LM2576 switching regulator to take the 12V down to 5V @3A for the pi etc. and a 7809 to drop...
  4. C

    TL072 op-amp voltage follower acts weird

    Hi All, I hope that I am posting to the right forum. After days of searching, reading, experimenting, I still have not been able to find a proper solution which I can tailor to my issue, so it is time to ask you guys. I made a voltmeter which consists of an Arduino microcontroller and an...