$7 tent HEATER provides comfort ON A budget$7 tent HEATER provides comfort ON A budget

At Hackaday’s Minnesota office, we appreciate central heat and hot coffee because the outdoor temperature is sub-zero in Celsius and Fahrenheit. Not everyone here has such amenities, and families living in tents could use heater help. If you live somewhere inhospitably cold and have the resources (time being the most crucial), please consider building and […]

FULL color 3D printing WITH THE assist OF AN INKJET HEADFULL color 3D printing WITH THE assist OF AN INKJET HEAD

3D printing is a prominent process, though one of the hangups is that parts are normally created in just one flat color. [Aad] has been working on a easy adjustment to his Prusa i3 printer, however, that allows the production of full-color parts. Note the double vertical assemblies – one bring the extruder, the other […]

CANNONBALL mold MAKES A DANDY integrating sphere FOR LASER measurementsCANNONBALL mold MAKES A DANDY integrating sphere FOR LASER measurements

It’s an age-old riddle: if you have a best sphere with a perfectly reflective inner surface, will light bounce around inside it forever? The answer is pretty evident when you think it through, but that doesn’t indicate that you can’t put the principle to use, as we see with this homemade Ulbricht sphere for optical […]