5 Dollar PCR machine
The 5 dollar PCR machine is a project from David Ng.
he created a very interesting design for the PCR machine. Instead of using eppendorfs, he is using teflon tubes and three different heating elements, which allows for cheaper (he has a working PCR machine for 5 dollars!) and faster DNA amplifications.
Here you can find the project page, with nice description and instructions
Below is a video from David explaining the project: