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  1. M

    Fm transmitter

    you get LM1117-5
  2. M

    Re: 0-24V/0-5A Lab Power Supply

    Lovely product and finishing, wat69!!
  3. M

    How can i use the clock generated from gps to synchronise a digital circuit?

    you need to phase lock your local oscillator to the 1 sec pulses that are output from the GPS receiver, by using proper divider ratio.One such article came up on silicon chip magazine of Australia in may and June issues of 2009. THUS IT HELPS TO LOCALLY HAVE A SYNCHRONIZED 10MHz  OR SOME OTHER...
  4. M

    Re: power surge kill power supply/motherboard

    while Hero999 already indicated, i would like to add that the electrolytic capacitors have a life time and they deteriorate. At times, we see capacitors  with a bulge on their top, a definite indication of its failure. I know of service Engineers in India, prefer  to change all electrolytic...
  5. M

    Micro FM TX (Micromitter)

    Hi AN920, Yes you definitely rocked the design. As i have  finished making few PCBs,  i may have to modd them manually. One observation -  you may  replace the modified schematic by changing the term Vcc on the collector of the modified darlington to +9V Dc .. this would be more appropriate...
  6. M

    Micro FM TX (Micromitter)

    Hi, Nice analysis AN920. Fine i shall be  using your suggestions . Nice of you and thanks for a timely coincidental help. Regrads Sarma
  7. M

    Micro FM TX (Micromitter)

    Hi AN920, Thanks for such nice review and critical observations. In fact i have made the PCBs locally and just abt to assemble. -your comments are just useful. the 47pF cap across collector and base of darlington , if it could be shifted to base to earth of the same device, will it suffice ...
  8. M

    Service Manual for SANYO MC-S680K, SONY FH-7MK-II, National RX-C46.

    Hi please see this site http://website.lineone.net/~harrison.elec/manuals.htm Sarma
  9. M

    ::) Electronic magazine for you

    Hi Walid jee, So Nice that you have taken my thoughts to 1960s- when we just entered Telecom service and were undergoing training- we has chance to get library access to see latest MAGs like                              Practical Electronics, Popuplar Electronics, Wireless Worls,    It is Nice...
  10. M

    0-30 Vdc Stabilized Power Supply

    Hi Thomas, Nice outcome for the effort put in, Siiting here in India, I really love it. All the best and wish you best future in your personal professional life Sarma
  11. M

    National Stereo Radio Cassette Corder Repair guide.

    please see the photo whether RX 5030 tallies Sarma at Hyderabad
  12. M

    National Stereo Radio Cassette Corder Repair guide.

  13. M

    National Stereo Radio Cassette Corder Repair guide.

    On the PCB or somewhere you are likely to find model number- otherwise, a set of radio and tape recorder circuit books are sold by M/s BPB in india and they used to have a shop in MG rad Bangalore. alternately, the local Panasonic service centre at bangalore(bangaluru now) can perhaps handle...
  14. M

    help wanted philips TV servicemode

    Hi, As some one said, enter the dragon may be easy, but managae and retreat is and will be a problem Same will be the case with philipsTV Evenif i could tell you how to enter , you require the data for seeting things over there-- any disturbance- you may not be able to work the TV to what it...
  15. M

    PCB BUILD

    The programs won't generally draw PCBs-- we the humans use the program to help drawing the PCB layouts. Even auto routing will disappoint unless the components are intelligently placed. as a beginner you may find it hard-- it was hard to take food even unless parents taught us-- put little more...
  16. M

    AM reciever mixer

    Hi Walid, i have a doubt on the schematic put up- there has to be another transformer to recover the 455Khz IF after the osc coil.-- in fact the primaries of Osc coil and part winding of 1Sst IF (yellow Generally) wiil be in series. the secondary of this yellow device will give you 455KHz--...
  17. M

    Professional Dead End?

    Why to feel like thaat/ general priciple in outsourceing is not to get bogged by repititive work-- you can always take up a front end researchand comeforward with newre and latest designs-- you may revise old sesigns to be cost effective-- one has perhaps to be resourceful in his/her thoughts...
  18. M

    AT PC power supply only putting out 10V between 12+ and GND

    Ofcourse, ther is another way- if you don'et want to use 5V at all the principal controll circuit regulating 5V, can be modded to control 12V instead of 5V. then the artifivial load on 5V can be avoided. Sarma
  19. M

    CD/MP3 player: added AC jack to DC battery connectors. Batts now won't work.

    you use a break type jack --when you unplg the adapter (wallwart at 4.5V DC), the internal batteries should connect thro the contact.  this techniques is used to cut off your speaker when you plug earphones.of course it is on audio output. same phylosophy can be follwed atinput supply also. Sarma
  20. M

    Circuit Diagram Schematic Sites.

    Hi Shamim, i fear you won't get -- you may have to purchase. I remember at Chennai- book shops in electronics spares market sell diagrams in multicolor. for eg.eletek books and kits is one source at chennai.
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