United States

Rock the Bike sells both buffer philosophies as distinct product lines. Its Pedal Power Utility Box has "no battery, only an ultracapacitor lasting a few minutes", specified as a 2–5 minute buffer ¹; its Event Power Box stores energy in a LiFePO4 battery for a steadier, longer show ². The company's generator stand is rated at 300 W continuous, and its product page adds that "300W sustained output is very challenging for most pedalers to sustain", consistent with the operator's own 50–75 W-per-rider planning figure ^3,4,5.

The Cinebike project, published by Open Air Cinema as Hackaday.io project 5665, is the only build in this directory whose complete bill of materials, wiring and four design iterations are public. Built after the company's screens were used at the Maidan barricades in Kiev in January 2014, it pairs a 24 V, 200 W scooter-motor generator with two chained Goal Zero Sherpa 100 battery packs, 196 Wh combined, buffering a projector that draws over 60 W ^6,7,8,9; the log also records a friction spindle machined from a skateboard wheel and the reversed-polarity wiring needed because the motor sits backward on the wheel ^{6,7,8,9,10,11,12}.

The Open Air Cinema Foundation later donated Cinebike-derived generator bikes to a community cinema in Oaxaca, Mexico, profiled under Spain and Latin America, which used them for years of local premieres — one published build becoming another country's programme ^13,14.