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Author Archives: Al Williams

Detailed Big Screen Multimeter Review

Posted on April 5, 2022 by Al Williams

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→

Posted in multimeter, review, Reviews, teardown, test equipment review

Rubber Band “Slide Rule” Doesn’t Slide, but Rotates

Posted on April 4, 2022 by Al Williams

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→

Posted in logarithms, math, misc hacks, slide rule

Watching a Spacewalk in Real Time

Posted on April 1, 2022 by Al Williams

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→

Posted in astrophotography, iss, News, Space | Tagged Spacewalk, Telescope

Circuit VR: The Wheatstone Bridge Analog Computer

Posted on March 31, 2022 by Al Williams

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→

Posted in analog computer, engineering, falstad, history, slide rule, voltage divider, wheatstone bridge

Non-Contact Probe Works Better with a Little More Complexity

Posted on March 29, 2022 by Al Williams

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→

Posted in dollar store, flashlight, non-contact, non-contact voltage, tool hacks

Tech In Plain Sight: Car Doors

Posted on March 24, 2022 by Al Williams

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→

Posted in automobile, car, engineering, Featured, Interest, power door locks, power window

Air Football Looks Pro

Posted on March 24, 2022 by Al Williams

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→

Posted in air hockey, Arduino Hacks, football, games, soccer

3D Printing Concept Car (Parts)

Posted on March 23, 2022 by Al Williams

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)→

Posted in 3D Printing, Automotive, car hacks, engineering | Tagged Concept Vehicle

[Ken Shirriff] Takes a Bite of the Apple-I

Posted on March 23, 2022 by Al Williams

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→

Posted in Apple 1, ic decapsulation, ken shirriff, retrocomputing, Reverse-engineering, shift register

Wireshark HTTPS Decryption

Posted on March 23, 2022 by Al Williams

If you’ve done any network programming or hacking, you’ve probably used Wireshark. If you haven’t, then you certainly should. Wireshark lets you capture and analyze data flowing over a network …read more Continue reading Wireshark HTTPS Decryption→

Posted in encryption, https, Network Hacks, SSL, wireshark

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