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  1. Replies
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    Closed: Re: hi frequency inverter with SG3525

    In4007 can handle only 1Amp and it can not work on HF.
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    Closed: Re: Programming a square signal

    Use a 4017 decade counter IC. Feed it with 20KHz. Take output from any pin.
    http://obrazki.elektroda.pl/9376764600_1437124053_thumb.jpg
  3. Closed: Re: AC voltage controller circuit using DIAC & TRiAC

    It is used to stop interference and noise generated due to switching to go to mains line.
    Capacitor C1 further filters high voltage spikes.
  4. Replies
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    Closed: Re: 6 Digits 7-segment display

    If cost does not matter, then it is OK. On the other hand 595 or 4094 based solution costs only a fraction.
    ...
  5. Closed: Re: Design of High frequency 1MHZ, 10-20 watt, PWM based inverter

    http://electronics.stackexchange.com/questions/38864/i-need-the-most-basic-circuit-diagram-for-wireless-energy-transfer-please
    http://www.google.com/patents/EP2317627A1?cl=en
  6. [SOLVED]Closed: Re: I want to connect 80 inputs to micro controller

    Here is a similar project with 64 inputs, pcb design and software. You can get many ideas from it..
    http://www.users.cloud9.net/~stark/md1.htm
  7. [SOLVED]Closed: Re: I want to connect 80 inputs to micro controller

    http://www.gammon.com.au/forum/?id=11979
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    Closed: Re: PA design with custom IC

    Vd should be within operating voltage range.
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    Closed: Re: VLF technology in Metal Detector

    http://obrazki.elektroda.pl/6271903300_1433547294_thumb.jpg

    http://paleofuture.gizmodo.com/walk-through-metal-detectors-were-invented-to-catch-thi-520336775
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    Closed: Re: Ferric Chloride amounts

    http://reprap.org/wiki/MakePCBInstructions
  11. Closed: Re: A non PWM

    Thanks for sharing, I'll surely try this. I was already considering this approach for making inverter for air-conditioning system, working on 220V AC supply, due to the same reason you described. I...
  12. Closed: Re: A non PWM

    There are many such inverter circuit details on internet. They are especially used for high power. For example this has 81 steps.
    http://obrazki.elektroda.pl/3288008800_1432610644.jpg
    You have...
  13. Closed: Re: Proteus ISIS suddenly Crashes on Simulation

    I think, it is not backwards version compatible, you have to redraw.
  14. Closed: Re: Proteus ISIS suddenly Crashes on Simulation

    Proteus8.1 sp1 crashes many time depending on components used. Proteus 8.0 is stable. Use it instead.
  15. Closed: Re: Push Pull Converter with Load - voltage drop Issue

    You can check the phase by shortening the loops end together (diode points). If heavy current flows in primary then it is OK or connect this way.
    http://obrazki.elektroda.pl/5267618400_1426255371.png
  16. Closed: Re: Push Pull Converter with Load - voltage drop Issue

    See if the two output loops are properly phased. This transformer is not made center=taped normally but there is a single loop which connects to bridge rectifier. Sometimes there is separate bridge...
  17. Closed: Re: Push Pull Converter with Load - voltage drop Issue

    Is the frequency not too high?
  18. Closed: Re: What are these dashes for on PCB power traces

    It increases current handling capacity of the track. It is easy to put solder on stripes..
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    Closed: Re: Why this is not working ?

    Yes, as you see in the module, it works.
  20. Replies
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    9,983

    Closed: Re: Why this is not working ?

    PC817 can't work without pullup. You can check 5V pulse on the input pin. IOC equally works well, infact with smaller code. I have used it in 5ch version. Even polling the pin for a certain time can...
  21. Replies
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    Closed: Re: Why this is not working ?

    Start timer1 on zero crossing. After the whole period, read its value. From it determine required delay for each step by dividing with number of steps.
    I just coded 5-ch dimmer using PIC16F676. I...
  22. Replies
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    Closed: Re: Why this is not working ?

    I think it is working good except it does not restart when all inputs are once set to zero if it is not intentionally made it it so.
    It can withstand hi-voltages from triac's-gate only in...
  23. Replies
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    9,983

    Closed: Re: Why this is not working ?

    This is good only to simulate and prove the concept. Actually I have used c code in it that's why it does not simulate in flowcode. Without comments, it will be difficult to understand. I personally...
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    Closed: Re: Why this is not working ?

    I use flowcode for programing. I have generated train of pulses for trigger. It helps better firing the triac.I have used 10bit ADC and it is translated into nearly 1000 steps. I think I shall...
  25. Replies
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    Closed: Re: Why this is not working ?

    It is simulation only but 5V can be generated like this

    http://obrazki.elektroda.pl/3727421400_1425221532_thumb.jpg
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