2+ hour, 26+ min ago   (309+ words) This has lead to speculation from armchair mission controllers that Yui could have requested to speak to the flight surgeons on behalf of one of the crew members that was preparing for the EVA " namely station commander Mike Fincke and…...

2+ day, 17+ hour ago   (269+ words) You've heard of wind tunnels-- get some airflow going over a thingy, put some some smoke on, and voila! Flow visualization. How hard could it be? Well, as always, the devil is in the details and [toas... You've heard of…...

3+ day, 8+ hour ago   (104+ words) If you've got a decent CRT monitor, you can usually adjust the settings to make sure the image scans nicely across the whole display. But what if you could rotate the whole image itself? [Jeri Ellsworth] has shown us how…...

3+ day, 14+ hour ago   (313+ words) Variable capacitors may be useful, but the air gap that provides their capacitance is their greatest weakness. Rather than deal with the poor dielectric properties of air, some high-end variable cap... Variable capacitors may be useful, but the air gap…...

1+ week, 4+ day ago   (180+ words) [A photo of the thrust meter from the Apollo lunar module][Mike Stewart] powers up a thrust meter from an Apollo lunar module. This bit of kit passed inspection on September 25, 1969. Fortunately [Mike] was able to dig up some "read…...

2+ week, 20+ hour ago   (314+ words) [The yagi, suction-cup mounted to a wall]If you're a regular reader of Hackaday, you may have noticed a certain fondness for Meshtastic devices, and the LoRa protocol more generally. LoRa is a great, low-power radio communications "read more [The…...

2+ week, 3+ day ago   (148+ words) The reason photographic darkrooms are needed is because almost any amount of light can ruin the film or the photographic paper before they are fixed. Until then these things are "read more Similar correction algorithms are used in x-ray computed…...

2+ week, 6+ day ago   (175+ words) Facebook Marketplace provides you with a free grain silo, so what do you do with it? If you are [saveifforparts], you mix it with other materials and produce a retro-style rocket ship prop. Art project? Sure, we'll call it that....

3+ week, 3+ day ago   (353+ words) You've probably seen Lichtenberg figures before, those lightning-like traces left by high-voltage discharge. The safe way to create them is using an electron beam to embed charge inside an acrylic "read more You've probably seen Lichtenberg figures before, those lightning-like…...

3+ week, 4+ day ago   (313+ words) For most of us who are not astronomers, the image that comes to mind when describing a reflecting telescope is of a huge instrument in its own domed-roof building on "read more For most of us who are not astronomers,…...