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Stupid electronics questions

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  • Jacob Tennant
    1. On a diode (1N4148) the little black line goes closest to the negative or the positive? 2. On a 12volt reed relay, the power & ground goes to the coil
    Message 1 of 2 , May 16, 2002
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      1. On a diode (1N4148) the little black line goes closest to the negative or
      the positive?

      2. On a 12volt reed relay, the power & ground goes to the coil contacts?

      Sorry for the stupid questions but don't want to screw this up!!!

      Jacob Tennant - K8JWT
    • cherry@neta.com
      The black line is the cathode. That is connected to the positive side if you want the diode off like across a relay. The cathode is connected to the negative
      Message 2 of 2 , May 16, 2002
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        The black line is the cathode. That is connected to the positive side if
        you want the diode off like across a relay. The cathode is connected to the
        negative voltage if you want the diode on like in a logic circuit.
        This diode symbol ->|-, the bar | is the cathode and the anode is the arrow >.
        Jim W7ANF

        Quoting Jacob Tennant <k8jwt@...>:

        > 1. On a diode (1N4148) the little black line goes closest to the negative
        > or
        > the positive?
        >
        > 2. On a 12volt reed relay, the power & ground goes to the coil contacts?
        >
        > Sorry for the stupid questions but don't want to screw this up!!!
        >
        > Jacob Tennant - K8JWT
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