Levitation by Sound
Levitating things with magnets is no great feat these days. We don’t see as many projects with sonic levitation. However, Japanese engineers have a new method to lift objects using …read more Continue reading Levitation by Sound
Author Archives: Al Williams
Hacking a PIC to Redefine a Microphone’s Transmit Frequency
Software defined radio and widespread software-controlled PLL synthesis for RF has been a game changer. Things like the RTL-SDR can be any kind of radio you like on almost any …read more Continue reading Hacking a PIC to Redefine a Microphone’s Transmit Frequency
The O’Scope Restoration
These days, a pretty nice oscilloscope can fit in your toolbox and even a “big” instrument is probably something you can tuck under your arm. But that hasn’t always been …read more Continue reading The O’Scope Restoration
Rare Radio Receiver Teardown
We’ll admit we haven’t heard of the AGS-38, it reminds us of the shortwave receivers of our youth, and it looks like many that were made “white label” by more …read more Continue reading Rare Radio Receiver Teardown
3D Printed Material Might Replace Kevlar
Prior to 1970, bulletproof vests were pretty iffy, with a history extending as far as the 1500s when there were attempts to make metal armor that was bulletproof. By the …read more Continue reading 3D Printed Material Might Replace Kevlar
Pinewood Derby Scale Measures CG
If you suffer from nostalgia, you might remember carving a block of wood into a car, adding some wheels, and racing it against other contestants in a pinewood derby. Today’s …read more Continue reading Pinewood Derby Scale Measures CG
Fail of the Week: The Metal Hot End Upgrade
My son, Patrick, has observed on more than one occasion that I do not like 3D printing. That may sound odd, because I built a printer back in 2012 and …read more Continue reading Fail of the Week: The Metal Hot End Upgrade
3D Printer Add on Makes Sharp(ie) Colors
We’ve all seen 3D printed jigs that use a permanent marker to color filament as it goes into the hot end. [Sakati84] has a completely different idea. A holder on …read more Continue reading 3D Printer Add on Makes Sharp(ie) Colors
Orbiter is Now Open Source
We always have it on our list to learn more about Orbiter. If you haven’t seen it, it is a hyperrealistic space simulator. Granted, you can put it in an …read more Continue reading Orbiter is Now Open Source
Linux Fu: Superpowers for Mere Mortals
You can hardly mention the sudo command without recalling the hilarious XKCD strip about making sandwiches. It does seem like sudo is the magic power to make a Linux system …read more Continue reading Linux Fu: Superpowers for Mere Mortals