Collaborate Disseminate
Electric guitar pickups rely on steel strings interfering with a magnetic field, the changes in which are picked up with coils of wire. That doesn’t work with nylon strings, because …read more Continue reading Optical Guitar Pickup Works With Nylon Strings
Proximity sensors are common enough in automation projects that we hardly give them a second thought — pick something with specs that match the job and move on. But they …read more Continue reading Souped-Up Reflective Sensor Uses Itself for Wireless Programming
Computer memory has taken on many forms over the years, from mercury-based delay-line tubes to handwoven magnetic core. These days, volatile storage using semiconductors has become ubiquitous with computing, but …read more Continue reading Glow In The Dark Computer Memory Illuminates The Fundamentals
Making keyboards is easy, right? Just wire up a bunch of switches matrix-style to a microcontroller, slap some QMK and a set of keycaps on there and you’re good to …read more Continue reading Take a Look at This Optical Keyboard
Regular readers will know that Hackaday generally steers clear of active crowdfunding campaigns. But occasionally we do run across a project that’s unique enough that we feel compelled to dust …read more Continue reading One Man’s Quest to Build a Baby Book With Brains
No one likes a flickering light source, but lighting is often dependent on the quality of a building’s main AC power. Light intensity has a close relation to the supply …read more Continue reading Measuring LED Flicker, With Phototransistor and Audio App
[Foone] saw a tweet a few weeks ago alleging that digital pregnancy tests are a rip-off. Regular, cheap tests have an absorbent strip running the length of the plastic, with one end exposed for collecting urine. A few excruciating minutes later, a little plastic window in the middle will show …read more
Continue reading Digital Pregnancy Tests Use LEDs to Read Between the Lines
Chances are pretty good that you have at least one digital image sensor somewhere close to you at this moment, likely within arm’s reach. The ubiquity of digital cameras is due to how cheap these sensors have become, and how easy they are to integrate into all sorts of devices. …read more
Continue reading Image Sensor from Discrete Parts Delivers Glorious 1-Kilopixel Images
Great things happen when we challenge ourselves. But when someone else says ‘I bet you can’t’ and you manage to pull it off, the reward is even greater. After [WilkoL] successfully made a tuning fork oscillator, his brother challenged him to make one out of a wine glass. We’ll drink …read more
Continue reading Homebrew Oscillator Is In a Glass By Itself
A digital camera has an array of sensors that captures light reflected or transmitted onto it. This build is something closer to a reverse camera – a single sensor that makes images on a matrix of LEDs. And we think it’s pretty neat.
We have to admit to being a …read more
Continue reading LED Matrix And A Phototransistor Make A Reverse Camera