Pedal Power: Difference between revisions

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<p style="text-align: center;">''Electronics:''</p>
<p style="text-align: center;">''Electronics:''</p>
'''ONE (1) x ''''''<u>low-voltage&nbsp;schottky&nbsp;diode</u>'''
'''''ONE (1) x'''''<b><u>low-voltage&nbsp;schottky&nbsp;diode</u></b>


*e.g.,&nbsp;[http://search.digikey.com/us/en/products/SR1045-TP/SR1045-TPMSCT-ND/2334476 http://search.digikey.com/us/en/products/SR1045-TP/SR1045-TPMSCT-ND/2334476]
*e.g.,&nbsp;[http://search.digikey.com/us/en/products/SR1045-TP/SR1045-TPMSCT-ND/2334476 http://search.digikey.com/us/en/products/SR1045-TP/SR1045-TPMSCT-ND/2334476]
*e.g.,&nbsp;[http://search.digikey.com/us/en/products/MBR1645G/MBR1645GOS-ND/918588 http://search.digikey.com/us/en/products/MBR1645G/MBR1645GOS-ND/918588]
*e.g. (alt),&nbsp;[http://search.digikey.com/us/en/products/MBR1645G/MBR1645GOS-ND/918588 http://search.digikey.com/us/en/products/MBR1645G/MBR1645GOS-ND/918588]
*Note: Regular diode will work, but&nbsp;schottky diode minimizes power loss&nbsp;
*Note: Regular diode will work, but&nbsp;schottky diode minimizes power loss&nbsp;


<br/>'''ONE (1) x&nbsp;''''''<u>adjustable voltage regulator</u>'''
<br/>'''''ONE (1) x&nbsp;'''''<b><u>adjustable positive voltage regulator</u></b>


*e.g.,&nbsp;
*e.g.,&nbsp;5-Amp&nbsp;low dropout (LDO) linear voltage regulator:&nbsp;[http://search.digikey.com/us/en/products/LD1084V/497-3413-5-ND/669183 http://search.digikey.com/us/en/products/LD1084V/497-3413-5-ND/669183]&nbsp;&nbsp;[http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/CD00003086.pdf [LD1084V&nbsp;Datasheet]]&nbsp;
*e.g. (alt), 7.5-Amp LDO linear voltage regulator: &nbsp;[http://search.digikey.com/us/en/products/LT1083CP%23PBF/LT1083CP%23PBF-ND/888922 http://search.digikey.com/us/en/products/LT1083CP%23PBF/LT1083CP%23PBF-ND/888922]&nbsp;[http://cds.linear.com/docs/Datasheet/108345fg.pdf [LT1083 Datasheet]]





Revision as of 22:09, 26 November 2011

Pedal Power for the Occupy Movement

To support the self-sufficiency of Occupy member sites, the Pedal Power group aims to facilitate the low-cost construction and effective usage of pedal-powered electrical generators and related technologies.

The goal for this design was low cost, with most materials sourced from Home Despot and/or local hardware stores. Can be built relatively easily by anyone with access to drill press and basic tools. Circuitry includes voltage regulator ($1.50 from digikey), a few capacitors/resistors, and a diode.


Contact Info

Group email: pedalpower@mit.edu

List admin: moallem@mit.edu

(** PLEASE DO NOT RELOCATE OR RADICALLY MODIFY THIS PAGE WITHOUT FIRST CONTACTING LIST ADMIN. KTHX **)

Parts/Materials List

"A-frame" bicycle stand

<p style="text-align: center; "</p>

Rear legs:  TWO (2) x 20" lengths of 1" x 1" (cross-section) rectangular steel tubing

  • e.g., 
  • Alternatively, can use up to 2" x 1"  (cross-section) rectangular steel tubingfor added stability

Rear cross-piece(s): TWO (2) x 12" lengths of 1" x 1" (cross-section) rectangular steel tubing  

  • e.g., 
  • Alternatively, can use single piece of 2" x 1" rectangular steel tubing


Front legs: TWO (2) x  20" lengths of 1-inch angle steel  '

Alternatively, can use 20" lengths of 1" x 1" rectangular steel tubing

Front cross-piece: ONE (1) x 16" (minimum, up to 30" maximum) long rectangular steel tubing, cross-section 1" x 1" (Note: If adding optional rubber feet, use longer front cross-piece for wider, more stable stance.)

Front-back connectors: TWO (2) x 20" long steel flats


[SPECIFY FASTENER HARDWARE!!! ]


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Rear-wheel (skewer) supports:

TWO (2) x 3/4" diameter (imperial size 3/4) socket cap bolts, length: 5" (Note: Can alternatively use hex-cap bolts; lower cost, but additional machining required)

FOUR (4) x size 3/4 Hex nuts

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Generator and mounting assembly:

ONE (1) x 24V DC motor (100 to 350 watt)

ONE (1) x heavy-duty door hinge

ONE (1) x strong L-bracket, at least 3" long on one side

TWO (2) x mounting plates (approx. 5" x 5", either steel or thick aluminum)

ONE (1) x roller bearings (should fit motor shaft perfectly)

ONE (1) x roller: solid aluminum cylinder, 1.25" to 1.5" diameter (Note: Can alternatively use Nylon cylinder with thin aluminum pipe as sheath)


[SPECIFY BRACKETS, FASTENER HARDWARE, AND DISTAL ROLLER SUPPORT!!! ]

[INCLUDE EXAMPLE LINKS!!!]



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Electronics:

ONE (1) xlow-voltage schottky diode


ONE (1) x adjustable positive voltage regulator




Construction