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  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..
  16. mastertushar

    how to get 5v dc from 24 vdc

    LM2576 is best for you as Tahmid said
  17. mastertushar

    Identify Tx and Rx from IR LED pair

    thanx .. i will update further, and may circuit is working now..
  18. mastertushar

    Identify Tx and Rx from IR LED pair

    thanx a lot to both ---------- Post added at 13:20 ---------- Previous post was at 11:28 ---------- sorry my LED is quit different . it is exactly reversed ... i have checked with mobile camera.. black LED is transmitter
  19. mastertushar

    Identify Tx and Rx from IR LED pair

    hi i have brought IR LD pair so plz tell me how i can identify which one is transmitter and receiver.. Note: one LED is blackish and one is transparent
  20. mastertushar

    Make antenna for 3g usb data modem

    hi the antenna shon in the figure is not with modem .. i want to make smiler one .. to increase signal strength .

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