Collaborate Disseminate
Drone control links are, from a radio signals perspective, nothing short of amazing: using a transmitter capable of transmitting, at most, one watt, a protocol such as ExpressLRS (ELRS) can …read more Continue reading Open-Source ExpressLRS Receiver Reaches for Range
Unlike biological systems, which can use muscles, robots that try to imitate them don’t have particularly fast, powerful, compact linear actuators available. This puts walking robots at a particular disadvantage, …read more Continue reading Building an Actuator for a Walking Robot
Gears are usually the biggest contributors to backlash in a mechanical system, but they’re far from the only culprits. Ball bearings are a less obvious source of imprecision, since any …read more Continue reading Splitting a Ball Bearing to Cut Out Backlash
Lightning, despite being a common and readily-detected phenomenon, is nevertheless difficult to study. One reason is the difficulty of predicting when and where lightning will strike; tall structures do attract …read more Continue reading Triggering Lightning with a Rocket
[Jan] of [Roetz 4.0] has a unique approach to multi-material 3D printing: he’s designed an extruder which takes two different materials and extrudes one as a shell around the other. …read more Continue reading Continously Extruding 3D Printed Tubes with Compressed Air
If you’ve ever thought about the nomenclature of electrical components, potentiometer stands out as a strange name, etymologically suggesting something like a voltmeter. In fact, the component took its name …read more Continue reading Reading a Thermocouple with Mercury and a Potentiometer
As strong and light as carbon fiber-epoxy composites are, the same can’t always be said of carbon-fiber reinforced 3D printer filaments. Of those that do improve over stock filament, the …read more Continue reading Strengthening 3D Prints with a Carbon-Fiber Epidermis
Optical cavities – two mirrors arranged to reflect light multiple times between them – form the basis of lasers and certain optical filters. Since any angle between the two mirrors …read more Continue reading 2026 Frikkin Lasers Challenge: Measuring Nanometer-Scale Displacements with an Optical Cavity
Silicon-based CMOS camera sensors are cheap and plentiful, but they’re rarely used to their full potential: they can detect a greater range of wavelengths in the infrared spectrum than they …read more Continue reading Taking Tri-Camera True-Color Infrared Videos
Unlike most cutting lasers, femtosecond lasers don’t vaporize materials; rather, they produce such short, intense bursts of light that the affected region is ablated without having the chance to heat …read more Continue reading Cross-Sectioning Crickets with a Femtosecond Laser