This is the HackRF One, a Software Defined Radio (SDR) peripheral capable of transmission or reception of radio signals from 1MHz to 6GHz. Designed to enable test and development of modern and next generation radio technologies, HackRF One is an open source hardware platform that can be used as a USB peripheral or programmed for stand-alone operation.
these four parts to assemble the Spring-loaded Drive Block alternative to the
MakerBot Replicator 2 extruder. The design files and assembly instructions for
this system are available on the
Thingiverse page. Print the available parts and attach them as instructed.
Check out Makerbot's
video for more information.
The Spring-loaded Drive Block is a simple system for pressing the filament
against the drive gear using a constant amount of force.