MIT researchers built a 3D printer from just $7,000 in off-the-shelf parts that can print ten different materials at a time. Current multi-material 3D printers generally can only spew out three materials and cost more than $200,000. From MIT News:
MultiFab gives users the ability to embed complex components, such as circuits and sensors, directly onto the body of an object, meaning that it can produce a finished product, moving parts and all, in one fell swoop.
The researchers have used MultiFab to print everything from smartphone cases to light-emitting diode lenses — and they envision an array of applications in consumer electronics, microsensing, medical imaging, and telecommunications, among other things. They plan to also experiment with embedding motors and actuators that would make it possible to 3-D print more advanced electronics, including robots.