Bike Polo - Mpls BFF Tournament from Mr.Do on Vimeo.
Wednesday, July 29, 2009
Monday, July 27, 2009
Pedal power for Kenya's mobiles
http://news.bbc.co.uk/2/hi/africa/8166196.stm
Two Kenyan students are hoping to market a device that allows bicycle riders to charge their mobile phones.
Jeremiah Murimi, 24, and Pascal Katana, 22, said they wanted their dynamo-powered "smart charger" to help people without electricity in rural areas.
"We both come from villages and we know the problems," Mr Murimi told the BBC.
People have to travel great distances to shops where they are charged $2 a time to power their phone, usually from a car battery or solar panel.
"The device is so small you can put it in your pocket with your phone while you are on your bike," said Mr Murimi.
It is estimated that some 17.5 million people out of Kenya's 38.5 million population own a mobile handset - up from 200,000 in 2000.
Tuesday, July 21, 2009
You are pedaling the Ginger Ninjas Sound System…
You are pedaling the Ginger Ninjas Sound System…Coupling super efficient digital amplifiers with generators attached to working bicycles (as opposed to purpose-built stationary bikes), this system allows a band to play off-grid anywhere, wall outlet or no, and to carry the system to a gig on two wheels. The band calls up members of the audience to pedal, up to four at a time with our current configuration.
How it works
All of our rides are Xtracycle-equipped sport utility bicycles: like regular bikes except longer behind the seat to provide more room for and better handling when carrying gear.
The Xtracycle system also provides for a dual-sided heavy duty kickstand that gets the rear wheel off the ground for stationary generation.
A small DC motor with a 1” roller rubs on the sidewall of the rear tire, generating DC current. This motor is engaged and disengaged via a shifter lever, allowing for rapid setup of the band, and also enabling the rider to engage the motor while on the road (more on this below).
This varying voltage DC pedaling energy is stored briefly in supercapacitors (“caps”), which shoot out a more consistent 11-15V. The buffering and storage of the caps supply amplifiers with both constant power and bursts. Our system demands about 160-200 Watts steadily, and up to 1000 Watts peak.
An L.E.D. indicator on the handlebars tells the pedaler whether to pedal harder, keep ‘er steady, or STOP. Too little voltage will kill the sound and too much will actually ruin the cap.
Each bike has its own cap, and each cap feeds into a common inverter. The inverter changes the DC current into 120 VAC with regular electric outlets, into which we plug all of our equipment: 2 x 500W speakers, mixing board, effects pedals, laptop, Down Low Glows, and chargers for the small devices we have on tour with us.
Without efficient amplifiers, we would need 8 pedalers to get the same sound level!
Our complete touring system incorporates flexible solar panels, small, eco-friendly Lithium Phosphate batteries, and on-the-fly generator engagement for all of our electric needs.
We’re using bikes to power music, but you could use a similar generator to power most any household electrical device.
CONTINUED...
Monday, July 20, 2009
I Bike EC
We bike it. We bike it a lot. Hey, if you like to ride bikes, and you like riding around the Eau Claire area, well have we got the T-shirt for you, Bucko! Much like cute puppies prancing about in a storefront window, our "I Bike EC" shirts are just waiting for you to purchase them, bring them home, give them a giant hug, unfold them, and pull them onto your no doubt attractive biker body. You can find these tasty tees (men's or ladies') for sale in our webshop, at our concert series, and at our offi ce. Feel free to buy one for every day of the week. And an extra one for pajamas.
–Volume One
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