Ask Hackaday: Are Extruders the Only Feasible Tools for Toolchanging?
https://hackaday.com/2021/12/13/ask-hackaday-are-extruders-the-only-feasible-tools-for-toolchanging/

Toolchanging in 3D printers is no longer something from the bleeding edge; it’s going mainstream. E3D has a high-quality kit for a toolchanger and motion system, our own Joshua Vasquez …read more (https://hackaday.com/2021/12/13/ask-hackaday-are-extruders-the-only-feasible-tools-for-toolchanging/)

USB LED Christmas Tree is Making Spirits Bright
https://hackaday.com/2021/12/13/usb-led-christmas-tree-is-making-spirits-bright/

[Piotr SB] knows there is no way out of the holidays; the only path is through. You’ve got to find cheer wherever and however you can, so why not cater …read more (https://hackaday.com/2021/12/13/usb-led-christmas-tree-is-making-spirits-bright/)

An Open Source Detector For Identifying Plastics
https://hackaday.com/2021/12/13/an-open-source-detector-for-identifying-plastics/

One of the challenges involved in recycling plastic is determining the specific type of plastic a given item is actually made of. To keep up with demand, large scale recycling …read more (https://hackaday.com/2021/12/13/an-open-source-detector-for-identifying-plastics/)

A Self Righting Balancing Robot Configured The Easy Way
https://hackaday.com/2021/12/13/a-self-righting-balancing-robot-configured-the-easy-way/

https://www.youtube.com/watch?v=FlivZoxygZM
" data-image-caption="" data-medium-file="https://hackaday.com/wp-content/uploads/2021/12/Snap-2021-12-13-at-13.38.42-featured.png?w=400" data-large-file="https://hackaday.com/wp-content/uploads/2021/12/Snap-2021-12-13-at-13.38.42-featured.png?w=800">Norwegian electronics hacker [Hans Jørgen] aka [time expander] on YouTube, has a clear interest in robotics, and for his latest effort, decided that it was time to build a custom …read more (https://hackaday.com/2021/12/13/a-self-righting-balancing-robot-configured-the-easy-way/)

Measuring Air Quality Using Mobile Sensors for the Masses
https://hackaday.com/2021/12/13/measuring-air-quality-using-mobile-sensors-for-the-masses/

Poor air quality is a major problem for city dwellers the world over. Dust, smoke, particles and noxious gases from vehicles, industry and agriculture makes many megacities downright hazardous to …read more (https://hackaday.com/2021/12/13/measuring-air-quality-using-mobile-sensors-for-the-masses/)

Pit Your Wits Against British Spooks
https://hackaday.com/2021/12/13/pit-your-wits-against-british-spooks/

The festive season is upon us, and for Brits of a technical bent that means it’s time for the GCHQ Christmas Challenge. Sent out annually as part of the Christmas …read more (https://hackaday.com/2021/12/13/pit-your-wits-against-british-spooks/)

DIY Semi Auto Grinder Builds Itself (Sort Of)
https://hackaday.com/2021/12/14/diy-semi-auto-grinder-builds-itself-sort-of/