Collaborate Disseminate
[Ctrl-Alt-Rees] bought something strange on an auction site: a Japanese Cefucom-21 from 1983. No? Didn’t ring a bell for us either. The legend on the front boldly proclaims: “CCI Multipurpose …read more Continue reading Strange English Teaching Computer Might Have Been Big in Japan
Generally speaking, the Hackaday Supercon badge will always have a place for SAO (rebranded as “Supercon add-ons”), and that makes sense. We did originate them, after all. This year, though, …read more Continue reading An SAO for Hams
[Igor] has an AS5600 magnetic rotary encoder chip on a breakout board. Normally, you’d think that was an easy device to work with since it has an I2C interface. But …read more Continue reading I2C the Hard Way
[Julian] knows that real diodes you can buy don’t work exactly like we say they do. That’s actually pretty common. We routinely ignore things like wire resistance and source resistance …read more Continue reading Ideal Diodes and How to Build Them
If you are younger than a certain age, RLL probably doesn’t mean much to you. Old consumer-grade hard drives used MFM (modified frequency modulation like a floppy disk uses) and …read more Continue reading Inside the RLL Hard Drive Protocol
We’ve often heard you should do everything twice. The first time is to learn what you need to do, and the second time is to do it right. We bet …read more Continue reading Power Supply PCB Redesign
You normally think of smart glasses as something you wear as either an accessory or, if you need a little assistance, with corrective lenses. But [akhilnagori] has a different kind …read more Continue reading Smart Glasses Read Text
If you get an inexpensive diode laser cutter, you might have been disappointed to find it won’t work well with transparent acrylic. The material just passes most of the light …read more Continue reading Laser Painting Explained
You want to add voice, music, or sound effects to your project. What do you do? Sure, it is easy enough to plug a Raspberry Pi or some other tiny …read more Continue reading Module Makes Noisy Projects Easy
One of the standard tropes in science fiction is some kind of device that can render someone unconscious — you know, like a phaser set to stun. We can imagine …read more Continue reading Tech In Plain Sight: Tasers Shooting Confetti