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Recent content by losturcos

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    TIP122 Heating Very Much, Is this normal?

    Thank you very much. Btw the circuit is as below:
  2. L

    Pin compatible mcus with AT89C2051

    Hello, Is there any microcontroller that has eeprom, and pin compatible with AT89C2051? Does any body know? It can be any brand. Thank you very much.
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    TIP122 Heating Very Much, Is this normal?

    Hello, I have a 24VDC regulation circuit which converts 60VDC input to 24 VDC by using TIP122 and 7824. The voltage on the TIP122 transistor is about 25 Volts and the current passing over the transistor is about 70-80 miliampertes generally. Actually this is a part of a circuit. My problem is...
  4. L

    IR2130 Current Sensing Problem

    What kind of details do you need? I will try to supply. ---------- Post added at 20:23 ---------- Previous post was at 20:19 ---------- By the way, "GNDB" is coming from the low side of MOSFETs. The diode is not between vs0 and mosfets. There is only 220R between the vs0 and mosfets low side...
  5. L

    IR2130 Current Sensing Problem

    Thanks for your replies. @iop95: I am checking how I can measure PF. I think I will need to make changes at the circuit for that. @mtwieg: Do you think that diode can cause that kind of problem? I will try by removing the diode.
  6. L

    IR2130 Current Sensing Problem

    can you give a little more detail about calculating PF? A formula for eg.
  7. L

    IR2130 Current Sensing Problem

    Driving circuit is as below:
  8. L

    IR2130 Current Sensing Problem

    I am driving 3-phase asyncronous motor by using IR2130 and IRFP250N from PIC microcontroller with 5 batteries. When needed, I must drive the motor to the easier side.
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    IR2130 Current Sensing Problem

    Thanks for your help. Do you have an idea abouy how I should detect the easier turning direction?
  10. L

    IR2130 Current Sensing Problem

    Nobody has an idea?
  11. L

    IR2130 Current Sensing Problem

    No idea? I couldnt find any reason yet.
  12. L

    IR2130 Current Sensing Problem

    Hello, I am driving motor with IR2130(3phase) and controlling the IR2130 with PIC. I am using 5 12v/7a batteries. The system is working like this: First I am starting the motor to run to one direction for 2 seconds. I am measuring the current. Then I am making the motor to run in reverse...
  13. L

    [SOLVED] Zero cross detection for 220VAC with PIC18F452

    Re: Zero Cross Detection Yes, you are right. Thank you very much.
  14. L

    [SOLVED] Zero cross detection for 220VAC with PIC18F452

    Re: Zero Cross Detection The sine generator and the circuit is as below. I have set the frequency as 10 Hz. to make easier to see the wave.
  15. L

    [SOLVED] Zero cross detection for 220VAC with PIC18F452

    Re: Zero Cross Detection I have tried other pins, too. Also I have tried as #BIT inputR = LATB.6 or LATB.4, too. And I am making the tests in proteus, so there is no programmer device. I have set an "On change" condition for PORTB in the simulation, that doesnt change, too. What can be the problem?
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