Turning Sugar Electrical Power Ethanol
When you put yeast in a sugar solution, the results are rather straightforward. The yeast munches on the sugar in the absence of oxygen and employs enzymes to convert sucrose into basic sugars. Those are subsequently converted into ethanol and carbon dioxide. One common method is to combine table sugar and water to achieve a 20% concentration before adding around 2 grams of baker’s yeast per liter. Before you know it, bubbles appear as CO2 escapes from the airlock. After a week or two, the liquid contains approximately 10-15% ethanol. It turns out that approximately 54% of the sugar you started with is converted into ethanol, while the remainder is expelled as CO2.

GameTank Open-Source 8-Bit Console
Clyde Shaffer spent years working on a console that would let people create and play entirely new 8-bit games on real cartridges. He started from the premise that most modern retro devices either replay old titles or rely on programmable chips that hide how the hardware actually works. GameTank takes a different route by using only common, still-available logic chips and two real 6502-family processors.

TORRAS COOLiFY Air 2026 Neck Fan Air Conditioner
Summer heat often leaves people weighing comfort against the steady climb in electricity bills. Running central air or room units for hours on end keeps everyone comfortable but spreads cooling across empty spaces and unused rooms. A more focused option directs relief straight to the person who needs it. The TORRAS COOLiFY Air 2026, priced at $99.73 (was $116.99), takes that idea and turns it into a device you simply wear.

Hand-Built DIY Magnetic Memory Module
Polymatt grew tired of watching memory prices climb. Instead of buying another expensive chip, he reached back to the 1960s and built storage the way engineers once did. Tiny ferrite rings now sit inside a compact case. Each ring stores one bit by holding a magnetic field in one direction or the other. Sixty-four rings together hold eight characters of text. Remove all power and the information stays exactly where it is.