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  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Recent content by Raheem

  1. R

    conversion from 110V to 220V 50Hz

    Hello! Thanks for such a nice advice! thught it did not do any good to me... ne ways.. the AIWA modem has the power supply BUILT itno it.. all it has a power cord coming out of it that is to be inserted into a 110V socket.. Raheem
  2. R

    conversion from 110V to 220V 50Hz

    Hello! I recentlly bought an AIWA external Fax modem! now the problem is that it runs on 110 V but here in my country normal voltages are 220V... presently i am using a step down transformer.. and i want to manipulate its circuit to run normally at 220V power ratings are 110 V , 9W i...
  3. R

    IBM Lexmark 4039 Toner Question

    If i could.. i would have never put up a question...
  4. R

    IBM Lexmark 4039 Toner Question

    when i said that ir refills using TONER.. it surely means that its a LASER printer. any ways.. i m not happy with the replies i received for my question :(
  5. R

    IBM Lexmark 4039 Toner Question

    hello All! yeah the thing is that i want to refill my IBM 4039 Printer toner... i have heard that the hp toner refill that comes in the market wont do the job?? is it true?? and is there a possibility that a photocopy machine's (ricoh, cannon, minolta) toner would work... Waiting for a Kind...
  6. R

    any bdy having a schematic of a high powered stereo amp

    Hello I m in need of a high power audio amplifier schematic >500 Watts. anyone please help! Bunch of thanks in advance
  7. R

    anybody having anu idea how u use a stk module

    hello all now a days i have been seeing pioneer's STK module IC's rolling oven in the market. does somebdy have a aschematic of an amplifier using any STK module operating on 12 volts. I would be greatful Thanks
  8. R

    connecting two pentium motherboards together

    the purpose is just not connecting them together the purpose i want to get by connecting the boards together to get enhanced performance from these old parts using parallel computing. i heard somewhere that this could be done. using them as 2 diffferent pcs using a cross cable or DCC is not the aim
  9. R

    connecting two pentium motherboards together

    Hi, i have a bit of an unusual request, i was recently sorting out my old "junk" and i came across a couple of pentium motherboards, and i wondered if it would be possible to connect the two together to act as one computer? I have heard of people connecting multiple pcs together, but i am...
  10. R

    someone here having a schematic for a TV box??

    Hello, i m looking for a schematic for that popular TV BOX that is used with a monitor to make it act like a tv? if someone has it please post it. Thanks a lot in advance!
  11. R

    schematci for a flip flop switch

    thanks alot ron u guys are really helpful. Thanks Alot.
  12. R

    schematci for a flip flop switch

    hello i need a schematic that should turn on a relay when a signal is givent to it. i.e a small pulse of current. and turn it off when same signal is received Thanks in advance
  13. R

    Please help identifying these mysterious components

    Hello i have some mysterious IC with many many legs! I'll list down what is printed on their rear anr front. If there is any programmable one amongst me do let me know Front Rear 5581-9117 PPB-071 RM-512A...
  14. R

    i need the user manual to the 8+2 panasonic amex 802

    I need the user manual to the 8+2 panasonic amex 802 telephone exchanger or atleast its programming part of the manual. I ve lost mine and need one. anyone PLEASE PLEASE assist.
  15. R

    difference between 7905 and 7805

    Hello i m not that new to ask the difference between a +ve 5 volt an a -ve 5 volt regualtor but only wanted to ask how can i use a 7905 in place of a 7805?

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