Collaborate Disseminate
If you are a schoolkid of the right age, you can’t wait to lose a baby tooth. In many cultures, there is a ritual surrounding it, like the tooth fairy, …read more Continue reading Citizen Science by the Skin of Your Teeth
[Big Clive] picked up a tiny heater for less than £8 from the usual sources. Would you be shocked to learn that its heating capacity wasn’t as advertised? No, we …read more Continue reading Heater is Either a Miracle or a Scam
We were as excited as anyone when MARSIS (the Mars Advanced Radar for Subsurface and Ionosphere Sounding) experiment announced there was possibly liquid water under the southern polar ice cap. …read more Continue reading Water on Mars? Maybe Not
When you think of ultrasonics, you probably think of a cleaner or maybe a toothbrush. If you are a Star Trek fan, maybe you think of knocking out crew members …read more Continue reading Ultrasonic Cutting on the Cheap
We aren’t sure why, but [Lev Chizhov] and some other researchers have found a way to make you smell things by hitting your head with ultrasound. Apparently, your sense of …read more Continue reading Smelly Ultrasound
The BBC wanted to show everyone how a computer might be used in schools. A program aired in 1979 asks, “Will Computers Revolutionise Education?” There’s vintage hardware and an appearance …read more Continue reading Retrotechtacular: Computers in Schools? 1979 Says Yes
We think of radios as audio devices, but for people who are visually impaired, it can be difficult to tell which channel you are listening to at any given time. …read more Continue reading Assistive Radio Tells You What You Can’t See
You have that slide rule in the back of the closet. Maybe it was from your college days. Maybe it was your Dad’s. Honestly. Do you know how to use …read more Continue reading How to Use That Slide Rule
Since the dawn of computers, we’ve tried different ways to store data. These days, you grab data over the network, but you probably remember using optical disks, floppies, or, more …read more Continue reading A Paper Caper: The Hole Data
If you’ve ever used an NE602 or similar IC to build a radio, you might have noticed that the datasheet has a “gilbert cell” mixer. What is that? [Electronics for …read more Continue reading Gilbert Cell Lacks Sullivan