We worked together with Magnificent Revolution to build a 12-bike Pedal Powered Cinema for a collective in Brussels, Belgium.
Here are the Power and Voltage displays we were asked to build for a 12-bike pedal powered cinema in Brussels.
We were asked to build an exhibition stand and equipment for Engineers Without Borders UK. They wanted the equipment to work with a wide range of ages and at various events. We were commissioned to build a pedal generator with sound system, a rope-washer pump and a small solar PV system. We also built three easy to set up booths, which can be used in different ways for different events.
The first event this will be used at is the Big Bang 2013 science festival.
I’ve recently finished work on another pedal powered smoothie maker. This time its a bit different: it’s designed to fit 20″ wheels of BMX bikes.
This was commissioned by London Bike Hub (who already have a large pedal smoothie bike, pedal powered scaletrix and a pedal powered electricity generator from me). They wanted a smoothie bike that was more accessible to younger folk with shorter legs.
Here are some photos and discussion about the build and finished unit.
This is the finished device. I used a cut-down BETO turbo-trainer stand, a flexible drive for power transmission from the wheel and an old liquidiser with the motor removed. The main details are in an Instructable I wrote, but this has a few bespoke bits.
The smoothie machine is bolted to a piece of wood and then clamped to a table when needed.
All the parts (except the bike and fruit)…
The BETO trainer is designed for 26″ – 700mm diameter wheels. It needed to be cut down so that it fitted 20″ bike wheels. This was an relatively easy job as the tubes just un-bolted and could be cut with a metal saw. The problem was that the width at the top becomes smaller as the stand is made shorter. This meant there was not enough room for the bike back wheel axle. I solved this by cutting away some of the plastic on each side and machining some new “nut holders”. These were a bit shorter and also wider (as BMX bikes have 22mm wide nuts rather than 18mm wide ones on larger bikes). This turned into quite a bit of hassle, but was a useful exercise for me to learn more about using the metal lathe at Nottingham Hackspace.
Also the smoothie maker I obtained was not an easy one to convert. It had a very short motor axle and hence I also needed to machine an extension bar for this, which can be seen above. This was also done on a metal lathe (I’ve got better at metal work…) and also uses a grub screw to hold it to the motor shaft. This conversion needed quite a lot of fiddling. This was an Argos own-brand smoothie machine. I would suggest using a Kenwood machine, which was easier to perform this conversion.
Our LED bar graph and energy bike were hired by Bristol University Sustainability department for use at the university freshers fair.
The pedal generator was used as a power generation challenge, with the highest output power winning a fair trade hamper. This meant that it was tested to the max with over 10,000 students visiting the fair and lots of them trying to pedal as fast as possible.
There were a few teething problems (mainly due to difficulties mounting the display onto the backing board) but it all worked well with one student generating 270W of electrical output power! I didn’t even know it went up that high!
If you would like to hire the unit for your event then please contact us.
With summer here and sun every so often shining through, we have recently been involved with loads of pedal powered activities. One recent event was pedal powered water cannons which was run as part of the Celebrate Cycling event at Nottingham University Jubilee Campus which was part of a larger programme of events celebrating 125 years of Raleigh Bicycles.
We set up two pedal powered water pistols which were used to know down environmentally themed targets, such as a coal fired power station or a fat-cat banker. At the same time a sound system kept energy levels up. We also rigged up a children’s bike with a bubble machine for the smaller children. While the weather was not so kind to us, the water cannons were in constant use throughout the day.
There were loads of bicycle related activities – making spiral drawings from bike parts, tall bikes, wind powered bikes and a slow bike race. There was also a performance of ‘lifetime guarantee’, a specially commissioned performance from Hanby and Barrett
If you are interested in any of our pedal powered activities, or think we could help at your event, then please get in touch.
Last Friday saw the Magnificent Revolution 20 bike cycle-in cinema being set up for the Milton Keynes Fringe Festival for an event organised by Independent Cinema MK.
The event attracted loads of keen cyclists, both young and old. Team MK were there and pedalling for the whole 3 hours. We even had power generated by the Mayor and a number of local MPs.
The event ran throughout the day and showed a number of interesting family-friendly animations, chosen by local animator, Tim Searle.
We have been involved with Magnificent Revolution for a number of years now and were involved with the design and build of the 20-bike generator and electrical system. We have worked together for a number of other pedal-powered projects including the giant power monitor at the Arcola Theatre.
Bespoke Gear have worked with London Bike Hub on a number of projects, providing their pedal powered sound system, bubble machine and pedal smoothie machines.
London Bike Hub are involved with all activities related to the promotion of cycling, including cycle training, educational workshops to get people onto bikes and bicycle maintenance.
They approached us to build a pedal powered Scalextric to provide a fun way of promoting cycling and we obviously accepted the challenge.
Bespoke Gear was comissioned to build the display system for an energy bike at the Arcola Theatre in Hackney, London. The energy bike is in the front-of-house at the theatre to help demonstrate and educate on energy consumption and efficiency.
This display system fitted to a pedal generator built by Magnificent Revolution. It has a bar-graph read out of the power and an actual value in Watts.
The system also worked as a voltage regulator, limiting the output voltage to 12V DC and shunting away the excess as heat, so that devices, such as phone chargers, can be plugged in for demonstration. The display is fully powered by the generator.
A few months ago we helped Magnificent Revolution Australia build their 8-bike pedal powered cinema.They recently used the pedal generator for a high-profile event in the heart of Sydney. More photos from the event are on their website here. It looked like a great event.
This followed the general design used for the Magnificent Revolution 20-bike generator, which I was involved with building a year ago. A blog post on the design and build is here.