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Recent content by mastertushar

  1. mastertushar

    12V 7.2 AH Sealed lead acid battery charger circuit needed

    ya I am using same battery. Can you suggest me any circuit. I am student.
  2. mastertushar

    12V 7.2 AH Sealed lead acid battery charger circuit needed

    No not fast charging .. I am using AMARON QUANTA Battery. I need simple circuit diagram with transformer and diodes and regulator IC to mange change 12V 7.2 AH battery.
  3. mastertushar

    12V 7.2 AH Sealed lead acid battery charger circuit needed

    I search on the forum but cant find satisfactory answer. Therefore creating this new thread. I have 12V 7.2 AH Sealed lead acid battery and want to make a charging circuit from a transformer. please suggest me a simple and best circuit which will give right charging current and voltage. No PWM...
  4. mastertushar

    small boost converter help

    hi i want to design an boost conveter in range 4.3v to 7.1 volts .. ouput 15v at current of 750mA .. plz suggest me any circuit.. and i have to drive all circuitary on input supply only.. i.e.4.3v to 7.1 volts only no bias supply ..
  5. mastertushar

    Help me for simple led drive circuit

    ya u are right i m using 6v 4.5Ah battery .. but tell me how much minimum voltage at which i can use that battery?
  6. mastertushar

    led driver using bc557

    if u exceeds 100ma the BC557 will heat
  7. mastertushar

    Help me for simple led drive circuit

    battery max vol 6 volt ,,, minumun volt 4.5 volts, output voltage of regulator 4 v . @1A . and i cannot make inductor bcoz i dont have anything to measure inductance.. as i m engineering student
  8. mastertushar

    Help me for simple led drive circuit

    ya ya u r rite my battery is 6volt.. but after use of its voltage starting decreases .. i m saying when it's volyage becomes 4.2 volt :)
  9. mastertushar

    Help me for simple led drive circuit

    @goldsmith thanx a lot for that. i will try and reply here . but as how much minimum possible voltage across the 3055 as suppose my battery voltage is 4.2volt then i think its not possible to have 0.2 voly across transister
  10. mastertushar

    Help me for simple led drive circuit

    ok give me that circuit . i want to drive more LEDs
  11. mastertushar

    Help me for simple led drive circuit

    thats what i need. ---------- Post added at 06:23 ---------- Previous post was at 06:13 ---------- as i need consatnt 4 volt from 6 volt so most preferred ck is of converter using inductor but i don't want to use it .. that's why i m asking ---------- Post added at 06:25 ---------- Previous...
  12. mastertushar

    need rtd and thermocouple amplifier ckt using opamp

    use general purpose opamp 741
  13. mastertushar

    Help me for simple led drive circuit

    i have 6 volt 4.5Ah battery and want to drive 30 White LED 5mm each LED @ 40mA current with constant current . but my problem is that i have not to use any inductor in the circuit. plz suggest me any circuit. see image i have to give regulated 4 volt to this array from 6 volt battery
  14. mastertushar

    interface PIC16F628A with compute

    ok . but my output is in digital already so i think no need to use adc.. ut how to implement it? can anybody give details plz
  15. mastertushar

    interface PIC16F628A with compute

    i have made this project Heart rate measurement from fingertip :Embedded Lab now i want to show same result on pc also and want to save it for different persons .. can it be possible? if yes plz help me..

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