University Reference Builds — Leicester and Sheffield/EWB
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Websitehttps://le.ac.uk/news/2016/july/leicester-students-produce-pedal-powered-cinema
Two English university teams built single-bike pedal-powered projector rigs five years apart, at Sheffield around 2011 and at Leicester in 2016.
Key facts
“The students connected a bike to a 250 watt motor via a belt. When a rider pedals at a comfortable pace of 60 revolutions per minute, it provides enough current to charge a battery. The battery then supplies energy to a square wave inverter circuit, which converts the DC voltage produced from the bike to AC voltage which then powers a 55 watt projector for enough time to watch a movie.”
University of Leicester engineering students led by Hanqing Lyu publicised their battery-buffered rig in July 2016 1. The University of Sheffield team, working with Engineers Without Borders, itemised its complete build in a poster, "Building a Pedal-Powered Cinema" 1.
Specifications
| Field | Value | Confidence | Sources |
|---|---|---|---|
| Leicester generator motor | 250 W (belt-driven) | Documented | 1 |
| Leicester pedal cadence | 60 rpm (comfortable pace) | Documented | 1 |
| Leicester projector draw | 55 W | Documented | 1 |
| Sheffield/EWB total build cost | 475 £ (c. 2011) | Documented | 1 |
| Sheffield/EWB projector | BenQ GP1 mini-projector, 60 W | Documented | 1 |
| Sheffield/EWB generator, buffer and rider output | not disclosedThe build's own poster is not in this site's source registry, so only the cost and projector figures the report carries are reproduced here; the poster's component list and rider-output claim are not restated. | Not disclosed | 1 |
Sources
- [1]University of Leicester 2016le.ac.uk



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