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circuit that triggers the instant the called party picks

Discussion in 'Electronic Projects Design/Ideas/Reviews' started by james, Oct 20, 2002.

  1. james

    james New Member

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    :roll: pls help me build a ckt.1.) that will count from second to minutes the instant the called party picks up the handset, and simultaneously stop when I put down the handset. 2) a mechanism that accept a set of coins and will switch on the line, ready for dialing. In other words, i want to make a coin phone. I would be grateful if somebody would take a time even just for the first one ( called party "pick up" detection.) thank you.
     
  2. thec

    thec New Member

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    Location:
    Alvesta, Sweden
    If use commersially, I would seriously contact a phone resaler, because building this gadgets may be illegal where you live. Hooking up to the phonelines isn't recommended if you don't know what you're doing. Really.

    //Albert "thec" Sandberg
     
  3. james

    james New Member

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    thanks for the advice

    thanks for the advice. Yes, it's for commercial use. my customers has to pay whenever they use my phone and i like it automated. It's hard to find commercially available unit in our place, and its expensive. Anyway thanks a lot.
     

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