Transparent Cylinder Shows You What You Otto Know About 4 Cycle Engines
https://hackaday.com/2022/07/20/transparent-cylinder-shows-you-what-you-otto-know-about-4-cycle-engines/

When we think of a typical four stroke internal combustion engine, we think of metal. And for any type of longevity or performance, that’s certainly the right choice. But [Integza] wanted …read more (https://hackaday.com/2022/07/20/transparent-cylinder-shows-you-what-you-otto-know-about-4-cycle-engines/)

Cut Just About Anything with This Combination Lathe and Wire EDM
https://hackaday.com/2022/07/20/cut-just-about-anything-with-this-combination-lathe-and-wire-edm/

They say that if you have a lathe, you have every other machine tool too. To some degree, that’s true — you can make almost anything on a lathe, including …read more (https://hackaday.com/2022/07/20/cut-just-about-anything-with-this-combination-lathe-and-wire-edm/)

Long-Range Thermocouple Sensor Sips Battery Power
https://hackaday.com/2022/07/20/long-range-thermocouple-sensor-sips-battery-power/

Sometimes you need to know the temperature of something from a ways away. That might be a smoker, a barbecue, or even a rabbit hutch. This project from [Discreet Mayor] …read more (https://hackaday.com/2022/07/20/long-range-thermocouple-sensor-sips-battery-power/)

3D Printed Skate Trucks Do Surprisingly Okay
https://hackaday.com/2022/07/20/3d-printed-skate-trucks-do-surprisingly-okay/

If you can buy something off the shelf, there’s a good chance that someone has tried to 3D print their own version. [Daniel Norée] did just that with skateboard trucks, …read more (https://hackaday.com/2022/07/20/3d-printed-skate-trucks-do-surprisingly-okay/)

Hacking A Jack-in-the-Box To Be Extra Surprising
https://hackaday.com/2022/07/20/hacking-a-jack-in-the-box-to-be-extra-surprising/

A Jack-In-The-Box is scary enough the first time. However, if you’ve seen the clown pop out before, it fails to have the same impact. [Franklinstein] decided that swapping out the …read more (https://hackaday.com/2022/07/20/hacking-a-jack-in-the-box-to-be-extra-surprising/)

How to Make a Model Roller Coaster Without Any Moving Parts
https://hackaday.com/2022/07/20/how-to-make-a-model-roller-coaster-without-any-moving-parts/

Roller coasters are not only great fun to ride, they’re also fascinating pieces of engineering. Building your own full-size coaster is sadly beyond most people’s means, so the average enthusiast …read more (https://hackaday.com/2022/07/20/how-to-make-a-model-roller-coaster-without-any-moving-parts/)

3D Printing a Check Valve In Metal
https://hackaday.com/2022/07/21/3d-printing-a-check-valve-in-metal/