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Recent content by JayantD

  1. J

    IGBT Circuit Problems

    In case you are using a current probe to measure current, it may have lagging effect due to its conversion time.
  2. J

    Using 6 TLP250 how to solve dead time for BLDC motor driver

    Connect 10k 1/4W resistors between Gate-Emitter of each IGBT. This will prevent IGBT damage in case of control power supply failure. JayantD
  3. J

    Voltage inverter from +5V to -5V 150mA?

    Hi, Check **broken link removed** Page A-21 Non isolated solution. I have good experience with R785.0-0.5. JayantD
  4. J

    [SOLVED] Skyper32R desaturation protection not working

    Hi, I'm using Semikron Skyper32R to drive a three phase IGBT bridge in an Inverter application. While testing it as per **broken link removed** Page 4, Whenever the VCE threshold exceeds 5V, the Gate drive PWM duty cycle reduces to 5% of the primary side input PWM frequency. I was expecting...
  5. J

    help for ISO122( isolation amplifier) power supply

    Hi zizi110, You may also find TF6664N from Mornsun useful. It works on 5V supply, isolates 0-5V, and also provides a 15V 20mA isolated power supply. Hope this helps.. Regards, JayantD
  6. J

    Require low power solar photovoltaic cells

    Already done that, no satisfactory results. Anyway, thanks!
  7. J

    Require low power solar photovoltaic cells

    Thanks.. I need 0.5W pv cell to charge a 3.6V battery. The links point to solar panels of much higher wattage! Regards, JayantD
  8. J

    Require low power solar photovoltaic cells

    Friends, Where can I get low power solar photovoltaic cells (for indoor sensor battery charging applications) in India ? Any dealers / distributors addresses or contact details, please! Thanks, JayantD
  9. J

    [SOLVED] LCD-PIC problem- only black squares

    try a 100ms delay in your while loop.
  10. J

    [SOLVED] how to avoid mobile frequency within a room

    Google "anechoic chamber" to begin with.
  11. J

    pic adc negative voltage

    Use an op amp differential amplifier ( or instrumentation amplifier) between the signals marked +ve and -ve. The output of the amplifier can then be connected to AN1. another way to do it is to connect +ve signal to one analog input (which you already have), connect the other (-ve signal) to...
  12. J

    diffrence between core 2 duo and dual core

    Difference Between Dual Core and Core 2 Duo | Difference Between | Dual Core vs Core 2 Duo
  13. J

    [SOLVED] can i use this 817C opto-isolator in place of moc3021 for 230vac 200watt fan dimmer?

    Not recommended.
  14. J

    7805 Voltage regulator????

    The LED connections are wrong.
  15. J

    what are the six general purpose register of pic controller????

    Please help yourself to the datasheet of the relevant controller and read it.
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