I’m on another clock kick. More of a wristwatch this time. The dream is to have a couple metal bars floating in oil, and when a button is pressed, they float to the appropriate hour and minute positions. For an initial version, I’m paring this way down to just a single indicator hand. On the… Read More: A Matter of Time »
This is a follow up from Infin1D, Rev 0.5, where I threw together a proof of concept in a few hours. This is the one where I spent some actual time on it and built a base that, while still quite rough, can be incrementally improved to arrive at a final product. This miiight have… Read More: Infin1D »
People often ask me, “Jarrett, what is the Best Thing in Life?” I’m not sure why people keep asking me this, but depending on my mood, the answer is one of two things: Floating on a lake, or swinging in a hammock. At peace with the world. Frustrated by this bounty of choice that I… Read More: Summertime, and the livin’ is easy »
The mechanical design for this project follows the “as quickly and easily as possible” maxim even more so than any other section. I used flat pack laser cut design strategies that results in pieces that snap together. I like that because it could in the future be turned into a kit reasonably easily, and in… Read More: POV Globe – The Mechanicals »
Persistence of Vision globes are a relatively simple project that everyone has to build, it seems. The fusion between mechanical, electrical, and firmware domains lead to some interesting challenges that are deceptively difficult to overcome. It’s a great project with a low barrier-to-entry, but it’s also easy to put your own spin on it. Heh.… Read More: POV Globe – The Software »
I’ve been working on an ESP32 module. Part of the problem I’ve been seeing with inexpensive IoT dev boards, is that the design around the power system hasn’t been very good. Here’s my attempt to fix that. This is a battery-ready module with a proper lithium battery charge circuit, lithium battery protection circuit, power supply,… Read More: uMesh »
In the deep, dark, depths of my project “to-do” list, I’ve always had a persistence-of-vision bicycle wheel light penciled in. I felt capable of doing it many years ago, and indeed, documenting the wiring was one of the driving forces for starting this website, but never got around to building one. Eventually, products like the… Read More: LightBeam »
Before YouTube existed, I saw a video online. There was no spoken dialog, just subtitles in Japanese, with upbeat music in the background. It shows pictures of point-to-point soldering of a document scanner’s sensor and some sort of microcontroller. Then the single line sensor is put into a box (with a lense) and taken for… Read More: Infin1D, Rev 0.5 »
I have access to a big box of Nokia phone batteries. This is a problem. It is very large. I do not have enough Nokia phones to use them all. There are three sizes: BP-6MT (1050mAh), BL-5J (1320mAh), and BP-4L (1500mAh). After some catalog-hunting (be vewwy vewwy quiet), I’ve found the connector they use, the… Read More: Sugar Glider Wifi Throwies »
I’ve been a really big fan of PCBModE for a long time. Designing beautiful PCBs is a seriously difficult skill, and a serious abuse of the PCB board houses. Saar Drimer of Boldport has done a great job, and anyone reading this should definitely check out his stuff. Where it falls down, though, is… Read More: Cosmetic Surgery on Altium Boards »