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  1. K

    1 to 2 data selector

    Hi all, I got a little confused with the data selector. im looking for a data selector to select 8 bit of data comming from a micro controller port going to one of two led driver IC ULN2803. i plan to use 2 of quadruple 1 to 2 data selector. this means 1 bit from microcontroller can go to the...
  2. K

    looking for active high output demultiplexer

    Hi all, i'm a newbie. can any body please share me some information about demultiplxer IC. im looking for a 4 to 16 bit demultiplexer IC with active high output. normally i use DM74LS154N which gives active low output. I also looking for an 8 bit led driver IC to drive 200 mA current. or a...
  3. K

    Alarm sound detector schematic

    Hi all, im a newbie. :-[ can anybody help me to get a schematic for alarm cound detector. basically it's only use to give a digital output high when it detects a sound with certain frequency. in this chase is 3 to 4 Khz alarm sound. thank you :)
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