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  1. M

    Where can I find 7490 decade counter circuit?

    hi can any1 tell me where i can find circuit for 7490 i mean i want full circiut and the pin description and how can we use 7490 in differnt modes.....if there are any.
  2. M

    How to change the frequency of 555 IC timer?

    how can i change the frequency of 555 ic timer????
  3. M

    software for circuit designing

    hi.. i have many circuits in my mind but i dont know where to test those ciruits. Obviously i cant use a bread board every time so can any one tell me which is the best software for ciruit designing

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