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Thread: Power Antenna Switch

  1. #1
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    Power Antenna Switch

    I have a '01 Mitsubishi Eclipse Spyder which I am getting ready to add my carputer into. My carputer will completely replace my head unit. Currently the HU controlls the power antenna when the stereo is on FM/AM. I have two basic questions:

    1) can I use the wire that goes into the radio to tell it that the car is on directly to enable the antenna?

    2) would it be feasible to put a manual switch on it so that if I wanted to lower the antenna (i.e. for a carwash) I could just flip the switch. I don;t mind hacking the dash since I bought plastic panels from a junked '01 eclipse specifically so I could add some hard buttons for the carputer..

    Any help would be appreciated. Now, if I could just get the guts up to re-wire my new car....

  2. #2
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    The wire for the power antenna should be white/black. i think what the radio does is supplies power to it when it is on this makes the antenna extend, cut power to it and the antenna should retract.

    all you would need to do is rig up a switch between the antenna wire and +V form the car acc, thus when the switch is off the antenna should retract and when it is on it should extend.

    this is all going on the theory that it extends when there is power supplid to the wire.

    hope that helps, Tom

  3. #3
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    Thats pretty much what I was thinking, just wanted confirmation. I used to not care too much about hacking my car, however, I've mellowed in my old(er) age

  4. #4
    Maximum Bitrate Jarrod's Avatar
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    automate power antenna?

    Sorry to bring up an old thread, but I am wondering what would be the easiest way to control a power antenna so that it automatically extends when the PC is in radio mode?

    I guess it would require a relay connected to the serial port (or the 4 relay USB phidget device) and a custom program that waits for a 'radio on' command and activates the relay to give power to the antenna and extend it.

    I am not very knowledgeable when it comes to relays, so any help would be greatly appreciated!

    Maybe I will just settle for a manual switch, but would be much nicer to have it automated
    Jarrod - Holden VX S!

  5. #5
    MySQL Error Scouse Monkey's Avatar
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    yup relay off serial or parrallel would work OR if you dont want to mess around get a Velleman SUB relay I/O board (£20 at cpc in the UK so pretty cheap) and this will do lots of thinks for you/

  6. #6
    Maximum Bitrate Jarrod's Avatar
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    lol..you really had me confused with what the 'SUB' relay board was...finally just realised you meant 'USB'

    I guess you mean the Velleman K8055 (http://cpc.farnell.com/jsp/endecaSea...=HK00851&N=411).

    How would one go about hooking up a relay to the outputs of this unit? I have searched and found some info, but wouldn't mind some help in my specific situation.
    Jarrod - Holden VX S!

  7. #7
    Maximum Bitrate Jarrod's Avatar
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    Im about to order one of these Velleman K8055 kits from CPC, but before I do, I'd just like to get a little more info on how to connect a relay to it?

    I got a price from a local distributor, and its cheaper to get it shipped from the UK!

    Thanks.
    Jarrod - Holden VX S!

  8. #8
    MySQL Error Scouse Monkey's Avatar
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    @ the USB - oops! me and my typos. Well i cant be perfect.

    It has these: 8 digital open collector output switches (50V/100mA max.) (on board LED indication)

    you may be able to use them to switch a 12V feed through to the antenna but I wouldnt risk exceeding the 100mA. I would find a small low power relay with a known power consumption for the coil and use the device to switch the relay on. IE have small 12V or 5V relay running off your PSU via molex splice or off a USB splice ( would not use the car 12V to power the relay as it has to be switched by the velleman). Then I would run the car 12V through the relay to the antenna.

    YOu should be able to get the power requiemnts for the 12V switch on the antenna and if it is low then you could avoid the relay and use the 12V off the PSU switched through the velleman to it.

    But if you do not know what it will pull then go the relay route.

  9. #9
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    Finally, the Loooong awaited project has begun. Thank you.

  10. #10
    MySQL Error Scouse Monkey's Avatar
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    eh?

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