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Recent content by avr_micro

  1. A

    How to design power analyzer?

    Hi, I want to make a circuit which measures: voltage(ph-ph and ph-n) current (each phase and current of neutral) Frequency Cos fi . . . and if possible THD. Is there any chip that measures these parameters from 3phase wire and give me the result digitally in order to connecting to micro...
  2. A

    how to read output of PT and CT?

    Nobody Knows !!!!!
  3. A

    how to read output of PT and CT?

    Dear All Can somebody tell me how can i convert CT and PT to a signal to be able to connect to my digital section(A/D)? I want to measure power of AC lines by these units. Regards
  4. A

    I need help for frequency meter

    Hi I need to measure frequency of a signal between 10HZ up to 100Hz.But the problem is voltage of that signal voltage varies from 20volts to 300volts. Can anybody give a tip or show me a schematic. regards,
  5. A

    Request for relay circuit

    but i need something which can be in scale of smd.
  6. A

    Request for relay circuit

    Hi everybody, I want an analog circuit which can be replaced relay. A and B can be any signal and c is the on/off command signal.So this circuit should be conduct any signal with maximum 1A current. regards,[/img]
  7. A

    how to 3 phase 120 degree difference?

    Ok.but how can i make 120 degree phase different between these three signal. Is there any capability in AVR for making these signals by pwm? regards,
  8. A

    how to 3 phase 120 degree difference?

    Dear Friends I want to make a circuit to simulate 3 phase 120 degree difference by avr.I want to connect these signals to transformers and make 3 phase 380 v AC. How is possible to make this phase difference by AVR? Is there any complete project in net? regards,
  9. A

    How can i measure events softly?

    Can Pid Theory help me?If it can,how can i write code? Regards
  10. A

    How can i measure events softly?

    Hi every body I have a problem in Analog measurement?When i want to measure an analog sensor (For example output of LM35) by micro controller(For example AVR) i read that input in a loop every time so the value is very unbalanced and as you can see i this picture has some instantly changes and...
  11. A

    I'm looking for a simple/easy DC converter 1V to 3.3V

    I think your best choice is:MC34063.Very simple and very easy to use,also very cheap. regards
  12. A

    request for a good power supply schematic

    What about Switching power supplies?Is there any reliable switching power supply that could be easy to made and cheap?
  13. A

    request for a good power supply schematic

    Dear masters I should build a micro controller based circuit in very noisy and unstable place.Sometimes the base electric line has current changes in about 500~1000 A.The base electric energy will be prepare by a big diesel generator.So i need a very good power supply schematic (5.0v,Min...
  14. A

    Req for building avr based plc

    build plc by avr Hi. For the most simple style:4 digital input and 4 digital output and 1 analog input. regards
  15. A

    Req for building avr based plc

    avr based plc Dear masters I want to start a project for building avr based plc,but i don't know how to start?Which parameters are more important? I am working with avr microcontrollers since 2002 and also i know abit about plc.Is there anybody to guide me for starting point?Finally,is it...
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