Collaborate Disseminate
We’ve looked at the WROOM-DA module before. It’s an ESP32 with two antennas, and [Andreas Spiess] says it is the ugliest ESP32 he’s ever seen. But beauty is only skin …read more Continue reading ESP32: Is Two Better than One?
It seems like large-screen cheap meters are really catching on. [TheHWcave] does a very detailed review of a KAIWEETS KM601, which is exactly the same as a few dozen other …read more Continue reading Detailed Big Screen Multimeter Review
Around here we mostly enjoy slide rules. We even have our own collections including some cylindrical and circular ones. But [Mathologer] discusses a recent Reddit post that explains a circular …read more Continue reading Rubber Band “Slide Rule” Doesn’t Slide, but Rotates
If you go to, say, a football game, you probably don’t get to see as much of the game as close as you do when you stay home and watch …read more Continue reading Watching a Spacewalk in Real Time
We are always impressed with something so simple can actually be so complex. For example, what would you think goes into an analog computer? Of course, a “real” analog computer …read more Continue reading Circuit VR: The Wheatstone Bridge Analog Computer
Non-contact voltage probes have been around a while and some test equipment now has them built-in. This is one of those things that you probably don’t think about much, but …read more Continue reading Non-Contact Probe Works Better with a Little More Complexity
There are a lot of common phrases that no longer mean what they used to. For example, you may have used the term “turn on the lights.” What are you …read more Continue reading Tech In Plain Sight: Car Doors
If you are an American, you’d probably think of [Silas Hansen’s] project as “air soccer” but most people will prefer air football. Either way, it is like air hockey but …read more Continue reading Air Football Looks Pro
When you want to fabricate something you either start with something and take away what you don’t want — subtractive manufacturing — or you start with nothing and add material, …read more Continue reading 3D Printing Concept Car (Parts)
The Apple-I was a far cry from Apple’s later products. A $666 single-board computer, the product had some unique design features including using a shift register for video memory to …read more Continue reading [Ken Shirriff] Takes a Bite of the Apple-I