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
The third essential element of any e-bike is, of course, the battery. Here I took advantage of already owning an electric lawnmower, figuring that the 40-volt, 4-ampere-hour battery I had for it would serve well. Being an open-source design no doubt keeps the price of this hardware down: The controller I bought set me back a mere $85.
Cars That Think
AUGUST 20, 2021
The third essential element of any e-bike is, of course, the battery. Here I took advantage of already owning an electric lawnmower, figuring that the 40-volt, 4-ampere-hour battery I had for it would serve well. Being an open-source design no doubt keeps the price of this hardware down: The controller I bought set me back a mere $85.
Cars That Think
NOVEMBER 1, 2023
And today, technology is maturing to the point that meaningful amounts of these energy giveaways can be harvested to liberate wearables from ever needing a battery. There are, researchers have discovered, a wide range of options to harvest enough microwatts to replace wearables’ batteries. Batteries die before animals do.
Baua Electric
MARCH 26, 2024
Well, not really cheated, but I just went with a retail solar generator system instead of DIYing that part myself from à la carte components. To save a bit of money instead, you can source your own solar panels, solar charge converter, batteries, inverter, and wiring, then make it all play together. Next came the air conditioning.
Cars That Think
APRIL 26, 2022
So when the coil is pointed north ( and downward, at my northern latitude ), the Earth’s magnetic field adds to the magnetic field created by positive currents in the coil windings; when pointed in the opposite direction, the Earth’s field subtracts. Power comes from an external USB battery.
Cars That Think
OCTOBER 25, 2022
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. I deployed my rig: a heavy-duty battery pack, the KrakenSDR, cables and antennas, along with a Raspbery Pi 4 to process data from the SDR. KrakenRF offers.
Expert insights. Personalized for you.
94 
Let's personalize your content