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Recent content by cabir

  1. C

    What is the chip marked IM340B B75558R 0810X?

    Re: im340b+data sheet hi all I am from Turkey İs any one able to read this chip can help me with the schematic Added after 11 minutes: Hi shoaibali could you be able to read or program IM340B Actually I need help for this chip also
  2. C

    problem with dtmf decoder ht9170b

    Hi all I tried the same schematic It works fine with all operators You may try another transformer lets say not 1 to 1 as in your schematic, it can be an impedance transformer 1 to 2,3,4. Ferit cores are much better . Also you try to reduce the resistor 100 K.
  3. C

    dtmf project help !!!

    Then You must use pull down resistors at lets say more or less 10 to 47 Kohms.
  4. C

    dtmf project help !!!

    Hi all There is no fault in your drawing some advices check the xtal and connect leds to the outputs with 330 ohm resistors serial
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