Turning one of my old Android phones into a webcam is something I've been thinking about doing for a long time now.
A couple of years ago, I backed a 3D printer project on Kickstarter (Rigid Bot, if you're interested).
The soldering iron worked great and had a really pointy nib for use on SMD circuit boards, but my hands just aren't steady enough for that delicate of work, I guess. I realized there's no real need for a USB connection!
It served me well for many years, but this is a definite upgrade.
This one has a soldering iron, hot air gun, and a variable power supply, all of which I ended up using for this project.
I decided to remove the battery completely since the phone would be permanently powered, and lighter without it.
Before I attached the USB wires to the power inputs, I attached the phone to the benchtop power supply and made sure it was working fine without the battery. I screwed the wires in place, and added a dollop of solder to each for good measure.Maybe like me, you're a pack rat and horde all sorts of shiny, semi-working technology . So, when my fancy Razr Maxx stopped charging about a year ago (hey, so I'm three generations behind the times, sue me), I simply had to set it aside and buy a new phone (S3, hurray! The Razr still worked fine, I just had to drill a hole in it and extend a battery wire out so I could attach some alligator clips to those and attach that to a USB charger.