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A DIY Tracker Tough Enough for the Arctic

Cars That Think

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. This is fast enough to identify wind waves, which typically have a frequency of about 0.2 Hz, and longer swells, which range from about 0.08

DIY 90
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A DIY E-bike Conversion on the Cheap

Cars That Think

Online discussions convinced me, however, that this is the expected behavior when commanding a motor to maintain a fixed amperage in its windings (thus applying constant torque) while under little load. The speed controller is connected to the motor and battery in the usual fashion, with an automotive-type blade fuse in line for safety.

DIY 145
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A DIY E-bike Conversion on the Cheap

Cars That Think

Online discussions convinced me, however, that this is the expected behavior when commanding a motor to maintain a fixed amperage in its windings (thus applying constant torque) while under little load. The speed controller is connected to the motor and battery in the usual fashion, with an automotive-type blade fuse in line for safety.

DIY 98
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Search for Buried Treasure With This DIY Magnetometer

Cars That Think

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. I connected this. It can be purchased. on Amazon for just US $40.

DIY 98
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Build a Passive Radar With Software-Defined Radio

Cars That Think

The Pi is connected to the SDR via a data link, and in turn the SDR is connected via coaxial cables to two directional TV antennas [right and left]. This was in a bid to shield the antenna from the reference signal and myself from the wind. James Provost.

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Best speakers ever

Electric Auto Association

Founding EVA chapter connects with entrepreneurial stars. Much earlier in the chapter’s history, member Otmar Ebenhoech, who would go on to create the Villa DC Motor Controller, made a strong impression on the DIY community using DC motors. More recently, Gage became the CEO of EVGrid , working on Vehicle-to-grid (V2G) tech.

EV1 52
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Automakers agree on common plug to recharge electric vehicles

Tony Karrer Delicious EVdriven

Neutral Kaitou KID @ Apr 19th 2009 4:45PM not if the electricity is from ultra efficient solar panels, hydroelectric dams or wind. Highly Ranked catachip @ Apr 19th 2009 4:57PM @ Elodie As long as the electricity is generated from wind, hydro, solar, or nuclear then there are zero emissions. Neutral who? @ Not the wisest thing to do.