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Recent content by M.Imran Ali

  1. M

    [Moved]: IR Reciever Problem after some days

    Hi experts I'm facing a problem , working on a dimmer circuit with IR remote . Microcontroller atmega328P Arduino ide for programming. Two interrupts for zero cross detection on ext int and IR receiver on PCINT. Remote control is Nec bsed . My circuit works ok for some days and after than IR...
  2. M

    IGBT Problems burnt out problem

    I used snubber circuit but result is same?
  3. M

    IGBT Problems burnt out problem

    I have 2uf cap between emitter and collector , Please suggest me what can i do to solve my problem?
  4. M

    IGBT Problems burnt out problem

    I have input capacitors but don't have TVS diode across IGBT ? - - - Updated - - - Do i need to replace 1200 volt IGBT with 1700 volt IGBT? - - - Updated - - - Where to install TVS diode across emitter to Collector?
  5. M

    IGBT Problems burnt out problem

    Hi experts I have problem , I am designing a buck converter input is 900 volt DC and out put is 384 volt DC . Using TLP350 Driver with 18 / -5 volt . My problem is that when i exceed input voltage greater than 800 volt igbt burnt with gate to emitter shorted a gate to collector also . I am...
  6. M

    [SOLVED] PIC18F4550 LCD Interfacing.

    Noise problem
  7. M

    120 volt battery charger

    Ya i have been working on electronics from 4 years , i have developed solar charge controllers , 12/24/48 volt battery charger and a lot more .... But this experience is very different from previous one ? First time dealing with transformer less power supply or switching mode power supply ? I...
  8. M

    120 volt battery charger

    40 Amp is total (charging + load of power drawn) . It is single phase system . And isolation transformer is not available with me so is it dangerous to use a non-isolated supply ? I googled but did not find any circuit of 120 V battery bank charger ? - - - Updated - - - Thank you Klaus for...
  9. M

    120 volt battery charger

    AC input voltage 220 - 240 V Current rating 40 A maximum frequency 50 - 60 Hz batteries are lead acid , and power will be drawn from an inverter while charging batteries . One thing more can i use half wave rectifier and than filter it using capacitors to take an average value dc ?
  10. M

    120 volt battery charger

    Hi friends i am working on 120 volt battery charger , it should be transformer less . Can any one suggest me any schematic ? I am to charge 10 batteries bank in series ? It is urgent please
  11. M

    Switching mode power supply of 120 volt

    Hi Friends i want to make an power supply of 120 V . I rectified 220 AC and used a buck converter after it to bring down voltage to 120 V . Now if i put a load on it its voltage come down and can't drive load . Where can be problem ?
  12. M

    [PIC] lcd shows black boxes after some days

    One thing more , this set up is used for solar charge controller , so there is large current 50A plus .... Do you think this is may be due to field created by high current ? If yes than how can i compensate?
  13. M

    [PIC] lcd shows black boxes after some days

    I am using CCS Compiler not Mikro c
  14. M

    [PIC] lcd shows black boxes after some days

    count = count +1; if(count>=200) { lcd_init(); delay_ms(20); lcd_putc('\f'); display_Screen(screen_num); count =0; }
  15. M

    [PIC] lcd shows black boxes after some days

    ya i am doing it regularly ? But no effect - - - Updated - - - Suggest me if i use buffer like CD4050 between lcd and micro controller than what will be the effect ?
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