i created this instructable because i have seen some other really good bike mounts but i didn't have the some materials or they wouldn't have fitted my bike (i have a vintage bike). it is designed to sit on the handlebars rather than the neck of the bike as the neck of my bike isn't shaped properly for that sort of thing but could be changed to do the reverse.
Step 1: What You Need
for this mount you will need: - an old reflector - a hard case for your phone - various screwdrivers - pliers (maybe) - hot glue gun (and a surface protector such as newspaper if you are working inside like i am) - possibly a piece if rubber if the handle bars are narrower than the reflector
Step 2: Take the Reflector to Bits
you will need to take the red bit off the reflector. there was a bolt at the back that you screwed off on mine. if you have a really old one like mine you might need pliers to get it off otherwise a screwdriver should suffice.
Step 3: Attach to Cover
prepare the hot glue gun. when the gun has heated up add some glue to the back of the cover and then put the reflector in it. it is probably a good idea to have some idea where you want it to go first (maybe mark it?). i also added some more glue over the top of that but i don't know how necessary that is. then wait for it to cool and solidify.
Step 4: Attach It to Your Bike
this is my first instructable so i hope it was helpful. i have used this one for a few rides now and it seems fairly sturdy but if you are looking for something a little less ambiguous i suggest you look at TheCreative's iPod/iPhone bicycle mount. and sorry the photos are up the wrong way in step three. i suck at using technology.