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Recent content by ngochaigv888

  1. ngochaigv888

    Minimum transistor frequency

    i think, it's range that transistor working very low noise.
  2. ngochaigv888

    Fridge compressor: What happens when PTC relay is still hot during start?

    if roto of motor is rotation, ptc is hot, but lt's smaller temperature to ptc change statuts. if motor connected to power and roto is not rotation. lock roto current is verry big. ptc is verry hot and turn off i realy want to talk about this topic. but my english is bad.
  3. ngochaigv888

    Air Conditioner Indoor Unit Motor (YWM 10/15/L/J) Wiring and Control - please help

    it't actualy. i'd repaired afew times.
  4. ngochaigv888

    Air Conditioner Indoor Unit Motor (YWM 10/15/L/J) Wiring and Control - please help

    speed of motor change by triac. micro controler receid speed from PG
  5. ngochaigv888

    optical sensor in rotary encoders

    i think, speed of photo diode is fast enought. this problem can generated by read device singnal's photo diode
  6. ngochaigv888

    dc-dc boost converter using supercap

    are you using transformer.
  7. ngochaigv888

    dc-dc boost converter using supercap

    i think it doesn't work. when suppercap voltage is decreasing less than 24v, the output can't equal 24v.
  8. ngochaigv888

    Help in finding a miniature distance sensor with high precision

    you can use a infrared sensor. i'm used one seria of sharp. and it can measur to 80cm. you need a microcontroler and modul wifi for microcontroler.
  9. ngochaigv888

    Matlab if-else within for loop problem

    i think, when in for statement is k=1, the if statement is not perform.
  10. ngochaigv888

    What to contact through air ?

    where everybody only use diffrent frequency can still to noise. i think, you should use a wilesst modul and sigin by pass.
  11. ngochaigv888

    [SOLVED] time between two signal changes

    the time of signal equal time of hight lever signal plus time of low lever signal. time of hight lever more than time of low lever, capaciti of signal is small.
  12. ngochaigv888

    [SOLVED] starting torque of inverter

    example: i start of motor at 5hz of frequency , but rated frequency is 50hz so, is it running. thank for attention.
  13. ngochaigv888

    Color Sensor for Light

    you can use prism to build a filter.
  14. ngochaigv888

    [SOLVED] starting torque of inverter

    I think. initial frequency is very small. slip is small too. if direct provided 50hz of supply to torque is elder.
  15. ngochaigv888

    [SOLVED] starting torque of inverter

    i want use inverter to control 3phase motor. i don't know, when speed's motor. is starting torque small?
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