The (Data) Plot Thickens
You’ve generated a ton of data. How do you analyze it and present it? Sure, you can use a spreadsheet. Or break out some programming tools. Or try LabPlot. Sure, …read more Continue reading The (Data) Plot Thickens
Author Archives: Al Williams
Homebrew Tire Pressure Monitoring System
When [upir] saw that you could buy tire valve stem caps that read pressure electronically, he decided to roll his own Tire Pressure Monitoring System (TPMS) like the one found …read more Continue reading Homebrew Tire Pressure Monitoring System
The Android Bluetooth Connection
Suppose someone came to talk to you and said, “I need your help. I have a Raspberry Pi-based robot and I want to develop a custom Android app to control …read more Continue reading The Android Bluetooth Connection
Picture by Paper Tape
The April 1926 issue of “Science and Invention” had a fascinating graphic. It explained, for the curious, how a photo of a rescue at sea could be in the New …read more Continue reading Picture by Paper Tape
The Shady School
We can understand why shaderacademy.com chose that name over “the shady school,” but whatever they call it, if you are looking to brush up on graphics programming with GPUs, it …read more Continue reading The Shady School
Debugging the Instant Macropad
Last time, I showed you how to throw together a few modules and make a working macropad that could act like a keyboard or a mouse. My prototype was very …read more Continue reading Debugging the Instant Macropad
Dead Bug Timer Relay Needs No PCB
We often marvel at the many things a 555 can do. But [Zafer Yildiz] shows us that it can even take the place of a PCB. You’ll see what we …read more Continue reading Dead Bug Timer Relay Needs No PCB
RP2040 Assembly Language Mix and Match
[David] is building a project with an OLED, a keyboard, and an RP2040. He’s perfected a scanning routine in C to work with the keyboard, but he still had some …read more Continue reading RP2040 Assembly Language Mix and Match
Wire Photo Fax Teardown
Fax machines had a moment in the sun, but they are actually much older than you might expect. Before the consumer-grade fax machines arrived, there was a thriving market for …read more Continue reading Wire Photo Fax Teardown
The Oscilloscope from 1943
[Thomas] comes up with some unusual gear. In his latest teardown and repair video, he has a vintage 1943 Danish oscilloscope, a Radiometer OSG32 on the bench. It isn’t lightweight, …read more Continue reading The Oscilloscope from 1943