Shock-Proof your Garmin GPS to prevent unintended power-downs. I look at a couple different ways to make the fix, and actually do one of them. This project requires soldering a couple of fairly tricky connections inside the otherwise working GPS, so use caution.
I use my GPS a lot, mostly for biking. It's mounted on the handlebar no matter where i'm going - on-road, off-road, everywhere. problem is, after enough hard bounces something goes loose inside the unit and it shuts off. i had this problem a lot with my older Etrex, now i've got a 76cs which worked great for a few months but now has the same problem - enough hard bumps and it shuts off. once the unit shuts off the first time, it usually will do it again and again with very small bumps, so it ends up nearly useless.
Step 1: Tools & Parts
- a couple small screwdrivers (phillips and regular)
- a sharp knife
- some high-temp glue such as hot-melt glue or silicone
- fine-tip soldering iron
- capacitor: 470uF 4V or similar (i used digikey part# 495-2292-1)
- a little bit of flexible wire
You want to get a high-value capacitor but it needs to be small enough to fit in the GPS case - there isn't a lot of room. After I finished it seemed like i probably could have fit something a bit larger in, such as one of the smaller 1000u electrolytic capacitors measuring 6mm diameter x 12mm long. I used a 470uF tantalum which is smaller but more expensive.