Centrifuga con materiales reciclados 2.0 / Centrifuge with recycled materials 2.0

thingiverse

Human: Recycled Material Centrifuge 2.0 - Version 2.0 Like the previous design, this is focused on combining 3D printing technology with the use of second-hand materials. The main element of a centrifuge machine is the motor, usually open-source designs make use of brushless motors that require additional electronics for management, such as an ESC (Electronic Speed Controller). To replace this, a larger computer fan is used, which can reach up to 5000 RPM. A structure was designed to place samples in the ependorf tube. For the base and cover material, the top part of a CD case was recycled and a 3D printed base was made, where the electronics will be placed for speed control and activation. To sense the number of revolutions per minute, a Hall effect sensor is used to detect a neodymium magnet placed at one end of the fan. The time it takes each turn is calculated through a microcontroller and displayed on an LCD screen. This project uses a 12V and 1A power source as a minimum to achieve maximum speed. The centrifuge has been tested with blood, protozoa mixes, and kombucha with excellent results. Schematics of the circuit and programming can be found at: https://github.com/jptincopa/CentrifugaRecycle