Technology

The K’NEX computer

The K’NEX computer

Wow, these students are trying to build a computer completely out of K’NEX parts, here’s a calculator… The K’NEX calculator stands over 10 feet tall, and can perform 4 bit addition and subtraction operations in about 30 seconds. The slowest part of the operation is the user entering the balls. From there the balls trickle […]

The Jaldi charger

The Jaldi charger

Pauli writes – I was assigned to design and implement a battery charger for 12 volt lead acid batteries used to backup WiFi- routers in rural areas of developing countries. Doesn’t sound very complicated a task in the first place, does it? At least that’s what I thought before finding out the facts (most of […]

Fuel cell car kit

Fuel cell car kit

When I was a kid, I lived for all of the science and tech kits I’d get for Christmas: the chemistry sets, the rocketry starter kit, the telescope set, the X-Acto hobby tool chest, etc. Today’s budding nerds get to experiment with hydrogen fuel cells, thanks to the Thames & Kosmos Fuel Cell Kit offered […]