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  1. karthikeid

    0-30V Stabilized Power Supply

    some of the pictures of my psu...
  2. karthikeid

    0-30V Stabilized Power Supply

    finally i have completed my circuit and it is working fine.... ;D :D there was a small problem with pcb track and i have rectified it... audioguru thanks for ur valuable help..... ill post my photos as soon as possible.... how to measure the max load current ??? 
  3. karthikeid

    Getting Started.. Suggestions

    learn basic electronics too... read these books.... electronics principles...malvino. art of electronics...Paul Horowitz and Winfield Hill
  4. karthikeid

    0-30V Stabilized Power Supply

    everything is perfect, the voltage across the base emitter and collector are constant ie 32.2V can i also try with TIP3055
  5. karthikeid

    0-30V Stabilized Power Supply

    both the the resistance are available .33ohms 2watts.... how do i test the transistor 2n3055... pls help me
  6. karthikeid

    0-30V Stabilized Power Supply

    the output of U2 reads 28.5V when in input of U2 above 0.5V and output U2 reads zero at input is zero
  7. karthikeid

    0-30V Stabilized Power Supply

    yes the input voltage at U2 varies from 0 to +11.4V.... then what should i do...
  8. karthikeid

    0-30V Stabilized Power Supply

    when the U2 will measure zero... what should i check it is not working...
  9. karthikeid

    0-30V Stabilized Power Supply

    i have made some mistakes in the pcb and i have corrected it now the led is not glowing and voltage at the current is 1.8, the output of U1 +11.4... but even i am not able to vary the voltage... :( at c1 it is 28.6V hi redwire can u post the pcb u made???
  10. karthikeid

    audio amplifiers

    hi here is an datasheet of an ic from ti, can u help me to put a volume controller to this circuit and what is meant by 4step gain control, multiple class d devices, shut down and mute control.... ??? what should be the input voltage and current...
  11. karthikeid

    0-30V Stabilized Power Supply

    the wiper at one end  of the pot  measures 4.7V and at other end -0.6V input voltage of U3....next hat should i do..
  12. karthikeid

    0-30V Stabilized Power Supply

    my psu seems to be not working there is no voltage  variation and i have used tle2141 opamps....what should i do.... ??? :( the led is glowing without any load.... i have posted the circuit diagram and the pcb made by me... Ultiboard0000002323.pdf
  13. karthikeid

    0-30V Stabilized Power Supply

    hi what are the things to be checked before connecting  the circuit to load... and i have used only 24volts 3amps transformer what will be the maximum power delivered to the output ???
  14. karthikeid

    audio amplifiers

    so can i use an 20W amplifier to an 60W 4 ohms speaker.....
  15. karthikeid

    audio amplifiers

    hi i have a doubt that an 20W amplifier can be used to 60W speakers ??? if not post a circuit for 2x60W audio amplifier....
  16. karthikeid

    Fm transmitter

    thanks for the information provided i am update the complete circuit once i have build it...
  17. karthikeid

    Fm transmitter

    hi i have drawn the fm transmitter circuit with the preamplifier kindly provide me the operation of this circuit ???
  18. karthikeid

    Fm transmitter

    hi can u post me anyone circuit here pls ???
  19. karthikeid

    Fm transmitter

    hi can u modify this circuit with an electret mic and all the correction to work well because i am looking for a smaller size transmitter  ??? the previous circuit u gave works fine too...but little big one :(
  20. karthikeid

    Fm transmitter

    hi how to add an condenser mic to this circuit is this circuit transmit well ??? ur opinion pls... 
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