The short history of early pedal powered machines - LOW-TECH MAGAZINE
Human Power Portable DC Generator – Pedal Power Generator
Portable Foot Pedal Generator Hand Crank Generator Fitness Power Spinning Bike | eBay
WEZA Foot-Powered Portable Energy Source
50/100W Foot Pedal Generator Small Hand-cranking Generator Spinning Bike 1-35V | eBay
Foot Pedal Generator Power Fitness Power Spinning Rehabilitation Training Device | eBay
Shaky Leg Power Generator : 19 Steps (with Pictures) - Instructables
Portable Foot Pedal Generator Hand Crank Generator Fitness Power Spinning Bike | eBay
Amazon.com: 50W/100W Pedal Generator Foot-operated Power Generation, Hand-cranked Generators, Fitness Power Generation Rehabilitation Training Device, Spinning Bike USB Interface/DC1-35V Output Interface : Everything Else
The short history of early pedal powered machines - LOW-TECH MAGAZINE
Pedal Power Generator
Electric Pedals
Aluminum Alloy Pedal Foot Pedal Generator 12v24v100w Documents Along With Physical Copies Of The Exercise Bike Bike Outdoor - Generator Parts & Accessories - AliExpress
K-TOR Power Box Pedal Power Generator - Assembly Video - YouTube