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Recent content by msmiha

  1. M

    Heating house with induction

    This means I wont gain anything against traditionally resistant heating? This explains why there aren't many systems in use for this purposes. However I thought there would take far less time to heat water with a induction, than with traditionally resistant heating (like with the induction...
  2. M

    UDP and TCP, how are they different

    You can use either! However I advice you to use UDP since you will be sending small packages and you do not need to deal with establishing a connection. UDP produces far less traffic on the network since it does not need to check if the package is actually arrived at its destination.
  3. M

    Heating house with induction

    Hi FvM! Why not? My idea is to use a steal heat exchanger (steel tubing with chambers) through which would flow water. Around that steel tubing I would wrapped coil and heat everything up. This heat exchanger would be connected to central heating system. So basically eddy current would heat...
  4. M

    Heating house with induction

    Hi! So I've got this idea to heat the house with the induction current. Same principle can be seen in the induction cookers. The idea is to build a "big induction cooker" that could heat a house if it would be mounted on central heating system. I've google up if such a system is already on the...
  5. M

    PIC16F877A How to enable PORT RB1, RB2, RB3, RB4

    Because of an example I'm assuming you try to write code in MikroC If you want to define PORTB pins RB1, RB2, RB3, RB4 as outputs write this: void main() { while(1) { //define RB1, RB2, RB3, RB4 as outputs TRISB.B1 = 0; TRISB.B2 = 0; TRISB.B3 = 0; TRISB.B4 = 0...
  6. M

    [SOLVED] PWM MOSFET excessive power dissipation losses?

    Thank you every one for explanation.
  7. M

    [SOLVED] PWM MOSFET excessive power dissipation losses?

    Thank you Easy peasy. Your were absolutely right, adding diode reverse to the MOSFET helped. The ringing is almost completely gone. I don't know why I was convinced there is a diode already integrated inside MOSFET. Probably because of the symbol in datasheet. Why is symbol in datasheet drawn...
  8. M

    [SOLVED] PWM MOSFET excessive power dissipation losses?

    Hi! I have tried to put as close as possible to the supply source of the circuit but it does not have effect, unless I put it across the load. What would happen if I put resistor between the driver and the gate? I guess it would affect rising and falling time do to change in RC constant. But...
  9. M

    [SOLVED] PWM MOSFET excessive power dissipation losses?

    Hi! If I add the capacitor 100nF across the load, ringing at turn off starts to disappear... However falling time also increases...
  10. M

    [SOLVED] PWM MOSFET excessive power dissipation losses?

    I know it's a bad idea but. I don't have any other options, since it's impossible to rewire LEDs. Regarding ripple in rising characteristic the problem is really in step response of power supply. I add capacitor 4700uF on the output of power supply and the ripple is completely gone. However...
  11. M

    [SOLVED] PWM MOSFET excessive power dissipation losses?

    I forgot to manged it. The load of the last oscilloscope photo are not the LED's but are resistors 3x6.8ohm in parallel. For now we can forget the LED's. I'm doing testing with resistors. However there will be approximately 70 LED connected to this dimmer. All connected in parallel (3.3V, 20mA)...
  12. M

    [PIC] How to create your own webpage for the PIC32 ethernet starter kit

    Hi If you look at the example that comes with this kit, you can see that PIC is working as a web server. Basically it accepts html commands and replays to TCP GET request on PORT 80 with html code that represents web page. So your task is to make the PIC to replay to GET requests.
  13. M

    [SOLVED] PWM MOSFET excessive power dissipation losses?

    Hi I have done as told but the results are not quite what I was hoping. The MOSFET is still hot but much, much less then before. Now there is a ringing at switching off? Why is that? Also the switch on characteristic is having some issues. I've tried to add 9.1 ohm resistor between the gate and...
  14. M

    [SOLVED] PWM MOSFET excessive power dissipation losses?

    Hi! Thank you Brian an Klaus for explaining what is going on. I will put my load on the drain side of a MOSFET and report the results.
  15. M

    [SOLVED] PWM MOSFET excessive power dissipation losses?

    Hi! It's not a breadboard circuit. Everything is in SMD technique on PCB

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