2020-08-21 (F) Weekly Summary

I foolishly let this project sit in my inbox for over a year because I was afraid that combing through pages of documentation was going to be overly time-consuming. Once I knuckled down, I saw that the author wasn't merely thorough, they were also organized, and I had no trouble finding everything I needed. The project was a valve that released a drop of water, started a timer, then triggered a camera shutter. It featured a custom circuit board, but there were instructions so anyone could build their own.

I had a bike computer when I was in high school, and it was rudimentary, and compared to this build, it was childish. With all the easy-to-implement sensors on the market, it is no surprise to see such exciting builds. Instead of going all out, this builder limited what the computer would do to things like a barometer, time, speed, direction. The alternative was to make a handlebar media center, but this computer prized a long battery life, so it was an elegant device.

When the COVID-19 pandemic started, I saw a lot of cool sidewalk art done in chalk. Years earlier, I saw a recipe in a Make: about how to make your own from paint and plaster of Paris. I loved the idea, but it wasn't until now that I bothered to find a recipe on Instructables and write about it.

I sketched the schematic for miniCard so I could start writing instructions. I already have most of the other pictures. These directions won't be full of details like I would typically provide. The audience for this project is limited, and I expect it will only be folks I know. Aside from this blog, I won't be promoting it publicly.
miniCard schematic

I started an Instructables page for miniCard. The hardest part was finding the essential pictures. While there are lots of pictures already, sometimes they show parts I've replaced or arrangements I improved, so many of the images do not fit the flow of how people should build a miniCard.
Start of an Instructable

My code was not complete. There was still an issue with the battery level threshold. I couldn't tell when the battery was dying until it was too late. I tried a few methods to determine the voltage where my boosting circuit gave up, but I didn't have any luck. My biggest failure was connecting a power supply that didn't go low enough to deactivate the voltage converter.
5V minimum power supply

The rest of the summary posts have been arranged by date. First time here?

Completed projects from year 1
Completed projects from year 2
Completed projects from year 3
Completed projects from year 4
Completed projects from year 5
Completed projects from year 6
Completed projects from year 7

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