Pedal Power

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:

Rear legs:  TWO (2)  20" long rectangular steel tubing, cross-section at least 1" x 1" (up to 2" x 1" for added stability)

Rear cross-piece: ONE (1) x 12" long rectangular steel tubing, cross-section at least 1" x 1" (up to 2" x 1" for added stability)

Front legs: TWO (2) x 20" long rectangular steel tubing, cross-section 1" x 1" (Note: can alternatively use 20" lengths of L-bracket)

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 mounting:

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!!!]