In both science and medicine, there is a requirement for dispensing drugs and other liquids in controlled measurements, or doses. This requirement is usually satisfied by a syringe pump. The Raspberry Pi Foundation has blogged about a Raspberry Pi-powered pump that costs a fraction of currently available models. The pump uses 3D-printed parts and off-the-shelf motors and comes in at around $50, as opposed to $750 (that’s the cheapest one Liz Upton could find). Read more here.