Batteries Building Connected DIY 
Cars That Think
MARCH 24, 2022
So, I set about building an open-source ice tracker from DIY components that not only proved to be much, much cheaper but also much more capable than the commercial options. The v2021 version can be powered on two nonrechargeable LSH20 D-cell lithium batteries , which work well even at extremely low temperatures.
Cars That Think
AUGUST 20, 2021
At the time, e-bikes were still rather exotic, at least in the United States, so it seemed worth the expense and effort to build my own. The third essential element of any e-bike is, of course, the battery. In 2009, I wrote in these pages about my efforts to. Fast forward a dozen years. E-bike availability and ridership have exploded.
Cars That Think
NOVEMBER 26, 2023
Now, after countless versions of wiring things together, and even designing my own audio mixers, I finally have a DIY solution that works within a reasonable budget. I chose the $10 ESP32 because it would allow me to operate the WM8960 and also accept audio via a Bluetooth connection from, say, my phone, and stream it to the WM8960.
Cars That Think
AUGUST 20, 2021
At the time, e-bikes were still rather exotic, at least in the United States, so it seemed worth the expense and effort to build my own. The third essential element of any e-bike is, of course, the battery. In 2009, I wrote in these pages about my efforts to. Fast forward a dozen years. E-bike availability and ridership have exploded.
Cars That Think
SEPTEMBER 28, 2021
The answer is yes—and it's one you can build yourself with parts any maker can easily obtain. With all of this data we looked at building a fundamental relationship between the movement of the body (and thus the activity of the muscles burning calories) and the actual energy expended by the whole body. James Provost.
Cars That Think
OCTOBER 25, 2022
Building off the demand stimulated by this activity, a number of manufacturers have started making premium, but still relatively cheap, SDRs. Both the KrakenRF SDR and the Raspberry Pi 4 [middle bottom] require a fair amount of power via USB C cables, so a battery pack [top middle] is needed for mobile operation. James Provost.
Cars That Think
NOVEMBER 17, 2021
APRS supports sending text messages, and if you're in range of an Internet-connected gateway node you can even. I wanted a portable device I could connect to my handheld radio that was completely self-contained, with a keyboard, screen, and GPS receiver all built in. I thought about building it around a Raspberry Pi.
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