Picture of Repair a key fob with conductive ink

I had a key fob for my car that wasn't performing as it used to. This instructable restored the buttons to their original function.

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Step 1: What you need

Picture of What you need
1 The fob to repair 2 a coin to open the fob 3 conductive ink

Step 2: Open the fob

Picture of Open the fob
Use your penny to pop open the fob. Mine has a slot made just for it. Insert the penny and twist.

Step 3: Inside the fob

Picture of Inside the fob
Inside the fob you will find a small circuit board, a rubber button cover with small conductive pads, and a coin sized battery. Inspect each of these for corrosion.

Step 4: A word about conductive ink

Picture of A word about conductive ink
This is conductive ink. It's a simple easy way to make a connection for circuits. It's easy to find on the Internet.

Step 5: Prep the ink

Picture of Prep the ink
remove the cap, unscrew the nozzle and remove the inner cap. The inner cap is easy to miss. Hopefully this saves someone some frustration.

Step 6: Conductive pads

Picture of Conductive pads
Find the conductive pads on the rubber cover. if they have rubbed off, use the conductive ink to repair the pad. Use just a little ink. I used too much the first time and had to clean it off and reapply. You just need enough to make a good contact.

Step 7: Image of repair

Picture of image of repair
This is an image of the repair. Be sure to let the junk thoroughly dry. The jnk is not conductive until it is dry. You can speed up dry time with a hair dryer.

Step 8: Inspect and reassemble

Picture of Inspect and reassemble
Inspect the contact pads and reassemble. You should have a working remote again. Note this remedy does not fix all broken remotes but if your contact pads were the issue you are golden. Note to the wise. Replace the battery with a fresh one while you are in here.
holymoses3 days ago

You can also take a simple pencil, the graphite inside is also conductive.

no important it so easy in iran

no important it so easy in iran

AnandD19 months ago

There's another technique thats cheaper, and uses material you already have.

Just use a paper filing punch to punch holes in an aluminium cooking foil, and collect the punched out circles. Glue them to the rubber pads with the worn out conducting coat.

cplongoria1 year ago

Great idea, thanks

look at the title "Repair a key dob with conductive ink" I beleive you mean fob not dob. otherwise, great 'ible.

gfetters (author) 2 years ago
The cost is $9.95
gfetters (author) 2 years ago
Sparkfun has it. http://www.sparkfun.com/products/11521
stubbsonic2 years ago
Thanks. I'm going to use this on my Universal Remote, as some buttons don't work and some require a great deal of grinding force.
bfarm2 years ago
I fixed a couple of hard to replace remotes this way using conductive paint from the auto supply store. The paint was made to repair rear window defoggers but was way expensive, $16.00 for a tiny vial. How much was the product you used? Source?