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Electronic key fob help

Discussion in 'Keychain Tools' started by Octagon, Jan 9, 2017.

  1. Octagon

    Octagon Loaded Pockets

    Is there a way to eliminate or reduce the size of electronic key fob for cars? Specifically I have a BMW and a Dodge and both no longer use keys. They have the electronic key fob for locking and unlocking and they are proximity types that must be in the car to start with push button starting. I would like to find another way to have the function without the key bulk or maybe an alternative such as a watch or watch like attachment. Maybe a RFID type card I could keep in my wallet. If not how are people carrying multiple key fobs?
  2. Water-Rat

    Water-Rat Loaded Pockets

    I forget who it was, but there was a member around here a ways back who took apart the plastic shell of his fob and then wrapped the innards in what looked like electrical tape or shrink wrap. This made for a much smaller unit. I don't think I'd do this without being really confident of what I was doing though.

    Just remembered, it was Thirsty Turtle who did that to a VW flip key remote: http://edcforums.com/threads/thirstyturtles-edc.129621/

    I have one of those fobs that has a "switch key" built in. I have it clipped to the top of my pickpocket dangler. This allows me to keep the key either inside my pocket or hang it outside my pocket for easy access. I have carried multiple key fobs on the top ring of the dangler, but this can get a bit bulky and I only do it when moving my family's vehicles around the property. I then unclip the fob from the rest of the keys to insert the keyfob to drive.

    I have read about some folks who have used small belt holsters to carry their car fobs. Holsters designed for lighters or small phones can be good for this.

    You could also have your fob as part of a second key chain. Put it on a dangler on the opposite side from your main key chain.
    Last edited by Water-Rat, Jan 10, 2017
    Last edited: Jan 10, 2017
  3. bub

    bub Loaded Pockets

    I have been searching the Internet for some way of doing this for the past few weeks. I think BMW are heading the way of using your phone but this is quite a hefty price option. Will be very cool to just be able to use your phone for everything.
  4. Blackheart
    • +2 Supporter
    • +1 Supporter

    Blackheart Loaded Pockets

    Then you exit your vehicle and drop your phone while crossing the street... and it's immediately run over by a bus.

    (don't mind me, I'm old and still view smartphones with great suspicion)
  5. bub

    bub Loaded Pockets

    That is my only concern as well, I do not think I could trust a smart phone to be able to get in to a car. Lol
  6. jag-engr
    • Administrator

    jag-engr Semper Bufo! Staff Member

    You could remove the bulky plastic housing like Thirsty Turtle did, but I don't know if I'm that brave...

    I could be wrong, but I think that most of the proximity fobs are active RFIDs, meaning that they are able to work over a much greater range because they are electronically broadcasting a signal using power from the battery in your remote. RFIDs in most cards or keys only work over a short range because they are passive RFIDs. Passive RFIDs absorb energy from radio waves and transmit the data on the chip back to the inquiring source.

    I've been thinking about the same thing myself. I don't have the proximity fobs, so I could just carry my key, but I like the functionality of a click fob.

    My wife and I both have the same make of vehicle, though, so I'm wondering if I can code each of our remotes for both vehicles. There could potentially be some problems with this, of course...
  7. Moshe ben David

    Moshe ben David Loaded Pockets

    @jag-engr: one would think you could cross-program the fobs. It is done with some other older technology. For example, we have a two-car garage, with two separate doors and hence two 'fobs' to control the doors. Each of them though can also open the other door.

    Probably just depends on how the car key fobs were designed. (Stating the obvious!)

    Be interesting to know the answer.


    Moshe ben David
  8. 0dBm

    0dBm Loaded Pockets

    The electronics in those fobs are quite simple and should not be overly consumptive of space. It is the housing that are typically bloated in physical size because most people will tend to lose them if they are made too minuscule.

    I eliminated the fob one for my vehicle and just use the key.