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Recent content by kamalavignesh

  1. K

    Pin 9 ULN2003 for unipolar steppers

    Hi shivaram, Is it necessary to connect supply to COM pin for non inductive loads like LEDs?
  2. K

    How to design a power supply that change current and voltage using comparators?

    For designing power supply with voltage and current control you can use TOP switch with feedback system. The feedback system will give control signal to the control pin of top switch by which the output voltage and current is limited to set value. this page will be helpful i think...
  3. K

    +12 -12 supply from 24V

    Hi ninju, In the ground i have to maintain zero potential because its the controller ground. according to your case in ground some potential will be there.
  4. K

    +12 -12 supply from 24V

    Hi, I have a 24V supply from that i need +12V and -12V. wattage will be less than 1W. I tought of using 7812 & 7912. But for 7912 i have to give negative input voltage how can i get that from 24V supply. Suggestions are welcome.
  5. K

    [SOLVED] Common mode voltage range of opamp

    Thanks for the inputs.
  6. K

    [SOLVED] Common mode voltage range of opamp

    Hi, why the common mode voltage range of opamp is limited to very small value in negative side(lower end). For example the common mode voltage range of lm324 is -0.3V to 36V. In positive side the range is more but in negative side the range is less. Why the opamp was designed like...
  7. K

    which Op amp can accept negative voltage of -0.5V

    Is there any op amp was available with Vcm in the range of -0.5V to 32V. If anyone knows means please inform the IC number.
  8. K

    [SOLVED] LM324 opamp gain instability

    Thank you very much orson cart for identifying the problem. Now i used 0.005 ohm shunt instead of 0.05 ohm shunt and the problem was solved. ---------- Post added at 17:25 ---------- Previous post was at 16:23 ---------- Is there any op amp was available with Vcm in the range of -0.5V to 32V.
  9. K

    [SOLVED] LM324 opamp gain instability

    Thanks for the suggestion guys. Now the gain instability problem was solved the reason for instability is due to poor wires. Now i have one more problem i connected both inverting and non inverting amplifier across same shunt to measure both charging current and discharging current of batteries...
  10. K

    [SOLVED] LM324 opamp gain instability

    Hi, I am using LM324 as inverting and non inverting amplifier for current measurement. The shunt will give 75mV@15A. This shunt output i am giving as input to LM324. I set the gain of amplifiers at fixed value but its not stable. The gain is reducing from lower end of current to higher...
  11. K

    Fibonacci series creation

    How to Generate Fibonacci series of pulses if 1000Hz wave form was given.:smile:
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