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Batteries & Capacitors

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Everpres.pdf. DRV8301: reset source for CR1 and CR2 - Motor Drivers Forum - Motor Drivers. Three Phase Pre-Driver with Dual Current Shunt Amplifiers and Buck Regulator (Rev. B) - drv8301.pdf. FFv1.1 Ground Firmware Testing / FFv1.2s. Melonscooter, so named for the "melon-sized" Turnigy C8080-170 brushless motor that drives it, has been through a lot of motor controllers.

FFv1.1 Ground Firmware Testing / FFv1.2s

The C8080-170 no longer exists, but the longer variant, the C80100-130 is now available through Leaders Hobby (what you get if you send "HobbyKing" forward and backward through Google translate a few times) under the EMP brand name. I used to think this was the hardest motor to drive, within the set of small EV traction motors. Used to. Then I met this insane thing: After attempting to drive this two-turn monster e-bike motor with only marginal success, the C8080-170 looks rather tame. Especially since Melonscooter has fixed gearing and no freewheel, so it's entirely possible to kick start it. The next step for FFv1.1 ground firmware testing will be upgrading to nicer FETs and improving heat sinking a bit. On to smaller things... FFv1.1 (and v1.0, really, since it was virtually the same) have been very successful so far.

Na-en. Evelo Omni Wheel turns almost any bike into an electric bike. Whether you cycle to work or just for pleasure, there are no doubt times when a little help wouldn't go amiss.

Evelo Omni Wheel turns almost any bike into an electric bike

The Evelo Omni Wheel can provide just that assistance, replacing the front wheel of most bikes to give an electrified power boost. The Omni Wheel is one of a number of recently announced powered wheels for non-electric bicycles, but Evelo co-founder Boris Mordkovich believes it could be the first to market. "Since we do not rely on crowdsourcing to fund the development and production, we are able to better control our timelines and meet the delivery commitments," Mordkovich tells Gizmag. "Although other companies have been working on an all-in-one wheel design for some time, at this point, we may be the first ones to actually ship the product to customers in March. " Those competitors include the FlyKly Smart Wheel and the Copenhagen Wheel. The Omni Wheel's battery size can be increased from 8.7 Ah to 14.5 Ah though, giving an increased range of up to 40 mi (64 km).

Convert Your Bicycle Into A Solar Electric Bike With This Gadget. Daymak Inc. was the company behind a number of interesting and intriguing innovations in the electric two-wheelers market.

Convert Your Bicycle Into A Solar Electric Bike With This Gadget

This time, the company based in Toronto, is all set to release the Daymak Drive System – DDS – an e-bike conversion kit that is powered by solar energy. Bicimotos. FlyKly aims to turn almost any bike into an electric motor-powered ride. FlyKly's Smart Wheel makes pedaling a bicycle easier Image Gallery (7 images) Electric bicycle wheels are coming to the masses, and they are coming from multiple sources.

FlyKly aims to turn almost any bike into an electric motor-powered ride

Superpedestrian - The Copenhagen Wheel. Barak brings the voltage to any bike. While electric bicycles are certainly becoming a popular new form of transportation, they're still generally much more expensive than their human-powered counterparts.

Barak brings the voltage to any bike

Some people attempt to cut costs by converting existing bikes to electrics themselves, although doing so usually involves a fair bit of technical know-how. Mechanical engineer Micah Toll now hopes to open up that conversion process to everyone, with his Barak Electric Bicycle Kit. Barak can reportedly be installed on almost any bicycle, and consists of a lithium-ion battery, a controller, a thumb throttle, and a front wheel with a hub motor.

The wheel replaces the bike's existing front wheel; the battery/controller mounts on either the seatpost, in a bag on the frame or in place of a water bottle (depending on the model); and the throttle goes on the handlebar. According to Micah, the whole system can be installed without any special tools or expertise, within about 15 minutes. Source: Kickstarter Share. Na-en. Batteries. How ultracapacitors work (and why they fall short) Hang around the energy storage crowd long enough, and you’ll hear chatter about ultracapacitors.

How ultracapacitors work (and why they fall short)

Tesla Motors chief executive Elon Musk has said he believes capacitors will even “supercede” batteries. What is it that makes ultracapacitors such a promising technology? And if ultracapacitors are so great, why have they lost out to batteries, so far, as the energy storage device of choice for applications like electric cars and the power grid? Put simply, ultracapacitors are some of the best devices around for delivering a quick surge of power. Because an ultracapacitor stores energy in an electric field, rather than in a chemical reaction, it can survive hundreds of thousands more charge and discharge cycles than a battery can. A more thorough answer, however, looks at how ultracapacitors compare to capacitors and batteries.

Capacitor 101 Putting the “ultra” in ultracapacitors Ultracap diagram courtesy of NREL. Self-contained powered Copenhagen Wheel hits the market – at last. The Copenhagen Wheel turns any bike electric Image Gallery (3 images) Back in 2009, MIT's SENSEable City team unveiled its Copenhagen Wheel prototype.

Self-contained powered Copenhagen Wheel hits the market – at last

Superpedestrian - The Copenhagen Wheel.