Want to mount your smart phone on your bike but don't want an out of the box product. Reader Brendon has an excellent solution.
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I wanted to mount my iPhone to my handle bars so I could use GPS, listen to music, and read bikehacks.com on my morning commute but was not willing to pay 30 dollars for a holder.
I drilled 4 holes in a plastic light switch cover, zip tied it to my handle bars with a small piece of handle bar tape underneath the zip ties to keep it snug to the bars, put Velcro on the switch cover and the loop side on my iPhone case. It works incredible, and the only thing wrong with it is I sometimes forget to take it in to the grocery store and leave my phone on the bike. I have even face timed my kids across the country while riding. Oh, it cost nothing, maybe would cost $4 or $6 dollars if you had none of the parts laying around.
1 plastic light switch cover, 2 zip ties, bar tape scrap (other substitutions can be used), Velcro, smart phone.
Small drill bit, and a drill(a pocket knife may even work)
Drill 4 holes in the light switch cover big enough to put the zip ties through.
Clean switch plate cover with alcohol, or whatever else you have that cleans. Dry it. stick on the the hook side of the Velcro. The self adhesive works great if your surface is clean. Repeat with the loop side of the Velcro to your smart phone or smart phone case.
Take bar tape scrap or other cushion material and cut to fit in between the light switch cover and the handle bar. I use 2 pieces, one under the mount, an the other on the bottom side of the handlebar to keep zip ties from slipping.
Feed zip tie through drilled holes, and zip tie to handle bar. Cut extra off.
Total cost for me, zero. Had everything in the garage. Light switch covers are less than 2 dollars, you can steal it from your apartment. Velcro is cheap, and available anywhere. Spring for the Velcro brand "expensive" stuff from the hardware store. Probably less than 4 bucks. Zip ties; buy a bunch, they come in handy and everyone should have them around anyways.
This design has been through over 100 miles of crappy pavement and a little off road with zero issues of slipping, looseness or breaking. The Velcro works great and the self adhesive is holding as good now as when I was initially put on.