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A DIY Calorie Counter More Accurate Than a Smartphone

Cars That Think

We used the NumPy scientific computing library for storing data in a convenient format, and the Scikit-learn machine-learning library for analyzing motion data from the IMUs. A subject drinks water containing deuterium and oxygen-18.

DIY 99
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Energy Harvesting for Wearable Technology Steps Up

Cars That Think

Using built-in fuel cells, the device absorbed the lactate in the sweat and combined it with atmospheric oxygen to generate water and pyruvate. For capacitors, voltage translates to electrons stored —the voltage drop across a capacitor is proportional to its total charge.) In the future, DIY may not even be necessary.

Energy 137
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How I turned a shipping container into a solar off-grid charging station with A/C

Baua Electric

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. It’s been sitting there through plenty of rainy days over the last month, and not a drop of water has entered the container through the hole for the wires. To be fair, I cheated a bit.

Grid 52
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Security With a Spectrometer

Cars That Think

By modifying the text output initiated after a button press, it can send a stored password. And what if I were to measure my skin after too much sun exposure, drinking a lot of water , or other conditions that could alter it’s signature?

IDEA 119
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Road Test: 2021 Mazda CX-9 Signature AWD

Clean Fleet Report

The dash layout is logical, simple and clean, with three round gauges (tachometer, speedometer and water temperature/fuel) with black faces and white letters were easy to read. For even more space, the second row folds flat producing plenty of room for a run to the DIY store or maybe some antiquing.

Mazda 52
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MAEAA Web Links

Tony Karrer Delicious EVdriven

Battery {Returnto top of page} EV Plans Sources Built For Fun ElectricVehicles : DIY plans for karts and buggys Drive Electric: EV3 Tri-Electric ElectricBicycle (Slipstream) : DIY plans and parts for the Slipstream electricbike Robert Q. RileyEnterprises : Electric and hybrid DIY plans. Discover the potential!