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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.

Recent content by virgiox

  1. V

    MosFet Selection and protection

    I understand what you mean. When both mosfets are turned off, the voltage you read with a probe it's the voltage you read on a voltage divider made with high impedance components: not so meaningful. I guess that even a 1 MOhm resistor to gnd would fit.
  2. V

    MosFet Selection and protection

    After 1 second all 4 generators go to zero. The idea was to test 2 half waves, one period with some easy to build generators. You can use BV (behavioural generator) to create more complex waveforms, i.e. a 1 s period square wave multiplied by a 1 kHz 70% duty cycle square wave, but usually...
  3. V

    MosFet Selection and protection

    pikstart I attached the ltspice schematic, should you have time and will to play with it.
  4. V

    MosFet Selection and protection

    Hi Pik, V3 and V4 are voltage generators emulating a square (rectangular) wave with a 70% duty cycle. It stays on at 10 V for 0.7 ms over a 1 ms period. After 500 periods ( 500 ms) V3 and V4 go to 0 V while V1 and V2 start, like V3 and V4 did before. So you have a pulsed current flowing from...
  5. V

    MosFet Selection and protection

    Hi Pik, I guess you need to drive it as PWM, with a frequency much higher than 1-50 Hz. Even with 1 kHz like below, you can create a 1 Hz drive signal with a ripple of +- 500 mA @ 15 A. It would have been 50 mA @ 10 kHz. By doing so you can use any stock mosfet as they are working in a very...
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