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Relay Latching effect question;

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  • 10-12-2010 3:47pm
    #1
    MarkD.
    Closed Accounts Posts: 163 ✭✭


    Can a relay latching effect power a 12V light if it gets a signal?


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    #2
    croo
    Moderators, Technology & Internet Moderators Posts: 1,334 Mod ✭✭✭✭croo


    I don't think this is an open source related topic, but also I have no idea what it means so cannot move it anyplace more relevant!
    Did you put this here in error MarkD?


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    #3
    MarkD.
    Closed Accounts Posts: 163 ✭✭MarkD.


    croo wrote: »
    I don't think this is an open source related topic, but also I have no idea what it means so cannot move it anyplace more relevant!
    Did you put this here in error MarkD?

    I just noticed there that it is the wrong area my bad, but cant seem to find anywhere else I could put it?


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    #4
    Johnboy1951
    Registered Users Posts: 13,997 ✭✭✭✭Johnboy1951


    In addition the question is not very clear ..... have you a particular relay in mind, a wattage of the bulb etc etc etc.


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    #5
    visual
    Closed Accounts Posts: 3,268 ✭✭✭visual


    Its hard to understand your question
    but some basics

    relays are a powered switch
    once power is supplied to the relay coil it operates a internal electro magnet that open or close a switch.
    Once the power to the relay coil is removed it reverts back to its original state.

    Sometimes this is not desirable as you might only have a momentary trigger that activates the relay and the intention is the relay will stay switched once triggered. This is called relay latching. there is various ways to do this using multi pole relays or diodes to maintain the voltage on the coil.

    I'm not sure what you want to know about a bulb ?
    Is the bulb to indicator the relay has switched or using the relay to control a light source like fog lamps in a car ?


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    #6
    visual
    Closed Accounts Posts: 3,268 ✭✭✭visual


    croo wrote: »
    I don't think this is an open source related topic, but also I have no idea what it means so cannot move it anyplace more relevant!
    Did you put this here in error MarkD?

    Its a electrical or electronic question

    Nothing to do with software


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    #7
    Capt'n Midnight
    Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 90,800 Mod ✭✭✭✭Capt'n Midnight


    visual wrote: »
    Nothing to do with software
    unless you forget to add a flyback diode. In which case the relay will try to fry the device trying to control it. And then the program will stop running.


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