This blog is being revived temporarily for the purposes of research toward building an auxiliary power system on one of my bicycles. Please keep reading; your help is appreciated! Please comment on these posts if you've got anything.
I'm fairly inexperienced as far as electrical engineering goes, so I'll need anyone's help developing an auxiliary power system for one of my bicycles in the next two weeks. I would like to debut this system, at least the power and control of the LED strip, by October 5th as part of PROject proJECT, a by-night light event in downtown Roanoke, VA.
All notes and contributions from others I will post to this blog!
Below you'll find a list of what I hypothesize I will need for this system. Following this list is another list (I love lists) of resources that have been compiled in relation to the first list.
Things:
1. 12VAC Sidewall Dynamo
2. Bridge Rectifier
3. Charge Controller
4. Batteries
5. DC-DC converter(s)
6. "outlets" to power things
7. Things to power:
a. Arduino UNO & Light Strip (5v? & 5v, 2A)
b. USB to micro-USB LG Phone (5.1V DC - .7A)
c. USB to micro-USB Novatel WiFi device (5V DC - 1.1A)
d. netbook using a barrel plug (19V DC - 1.58A)
The dynamo will send varying voltages of AC power into the rectifier which will turn it into DC. The charge controller will feed DC power into the battery if necessary. I'm not exactly sure how charge controllers work yet. I also am not sure what type of batteries I would need and how they would work either. The batteries will provide DC power of a certain voltage (which drops as the battery drains) to one or various DC-DC converters made to provide the various voltages I need for the listed devices. I only plan on powering/charging one of the four devices at a time so I think a switch delegating which device I would power would work. I can wire a female USB port through which I can power the phone and wifi device. I'm not exactly sure how to power the Arduino and LED strip yet, but there will be something for that. Finally, I'll wireup a 3ft wire & barrel plug that'll plug into my netbook.
Current On-Line Resources:
Possible Sidewall dynamo (I cannot afford to have a wheel built & purchase a hub dynamo.)
[ http://www.amazon.com/Bike-Bicycle-Dynamo-Generator-12V/dp/B000OBWMGK/ref=sr_1_1?ie=UTF8&qid=1348419091&sr=8-1&keywords=12v+dynamo ]
Simple Bridge Rectifier Tutorial:
[ http://www.dummies.com/how-to/content/electronics-projects-how-to-build-rectifier-circui.html ]
Charge Controller as recommended by Sean McIntyre:
[ http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=280859381368&ssPageName=ADME:L:OC:CA:3160 ]
DC-DC converter as used by Sean:
[ http://www.ebay.com/itm/LM2577-DC-DC-Power-Supply-Step-up-Module-25W-Heatsink-/260775477112?pt=LH_DefaultDomain_0&hash=item3cb76dff78 ]
Documentation of Sean's project of lighting up EL wire w/ a hub dynamo using a rectifier and some inverters:
[ http://blog.boxysean.com/2012/06/04/bike-powered-illumination/ ]
Arduino & Light-Strip + Tutorial from adafruit:
[ http://www.amazon.com/gp/product/B006H06TVG/ref=gno_cart_title_1 ]
[ http://www.adafruit.com/products/306 ]
[ http://learn.adafruit.com/digital-led-strip/overview ]
(From
the tutorial, it still isn't clear to me how to power the Arduino &
light strip from the same 5v source. Tutorial says: "For a standalone
application (not USB connected to a computer), you can power the Arduino
from the same regulated 5V supply as the LEDs — connect to the 5V pin
on the Arduino, not Vin, and don’t use the DC jack on the Arduino.")
Very informative, but slightly over my head set of links & documentation for similar but still different applications on 'POKING THINGS WITH STICKS':
[ http://www.pokingthingswithsticks.com/projects/bicycle-iphone-and-usb-charging/the-charging-circuit/ ]
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