Bike Power workshop 6th April

A civic digintary producing some useful 12v to run a lighting desk (photo credit: http://www.haworth-village.org.uk/events/haworth-events/pictures/pictures.asp?top=Fair%20Intents&cat=Ecofair%202010#)

A civic dignitary producing some useful 12v to run a lighting desk (photo credit: http://www.haworth-village.org.uk/ )

36V scooter motor which can also be used as a generator. Note hi-tech anti-vibration coupling
36V scooter motor which can also be used as a generator. Note hi-tech anti-vibration coupling

Spring is here and it’s time to get the fun outdoors equipment out of the vegan mothballs and have a bit of a tinker.

Later on in glorious sunny days ahead we’ll be doing a thing with bicycles and projectors, using one to power the other.

Also we hope to look at what (if anything) it makes sense to power by bicycles:

  • Washing machines, fridges, kettles and welding equipment – probably not. Unless you want to get over-familiar with long hours in the saddle and severe disappointment.
  • Audio equipment (if it’s efficient),  phone chargers, LED lighting – sure.
  • Projectors- can be a bit challenging

We’ll be measuring power in Watts, because hopefully that’s a unit people understand.

 

 

We’ll also look at other display methods (so, amp-hours for example, which is known as C in the world of batteries).

 

Power capacitor - handy for evening out the power into between pedal strokes.

Power capacitor – handy for evening out the power flow between pedal strokes.

 

 

 

 

 

 

 

Schottky diodes - useful when combining batteries with generators (to stuff current flowing back and turning the generator back into a motor)

Schottky diodes – useful when combining batteries with generators (to stop current flowing back and turning the generator back into a motor)

As a warm-up to all that fun, we’re getting the gear out on Saturday at the 1in12 Club, reminding ourselves about what works and what needs a bit of attention, looking at what can be improved in the general direction of making folks understand what goes on with the whole generating-power-with-bicycles malarkey.

We’ll be soldering some stuff together, and doing some basic assembly using cycle stands and carpentry (no welding!)

 

Then we’ll make some power with bicycles (bring you bike), store it in capacitors or batteries, and run an inverter to get

Some two-core cable ideal for medium power 12 and 24 volt experiments

Some two-core cable ideal for medium power 12 and 24 volt experiments

some 240V happening.

We’ll plug in a couple of projectors and compare the power consumption, and do some maths around how many people need to cycle to make all the gear work.

Finally, we’ll visit the bar for a couple of drinks then saddle-up and watch a cycle-powered film.

 

And ruthlessly photograph, blog and tweet the living daylights

Volt/Watt meter showing mains voltage

Volt/Watt meter showing mains volt

out of the whole event for the benefit of all humanity.

See you there. 12.00 start for the start of the techy fiddling, 4.00 for a look at what the gear is and how it works (and a bit of chain-oiling), 7.00 for the film. Cafe and bar open from 12.00 (bar for members and guests of the 1in12 club, cafe is an alcohol-free zone open to all sentient beings who can make it up three flights if stairs).

 

A combination meter with two displays, which can show Volts, Amperes, Watts, Capacity (amp/hours) and time

A combination meter with two displays, which can show Volts, Amperes, Watts, Capacity (amp/hours) and time

Main Volt/Wattmeter - currently showing the 211 Watts needed to run an LED projector

Main Volt/Wattmeter – currently showing the 211 Watts needed to run an LED projector

 

 

 

 

 

 

 

Another dude powering a cycle generator - http://www.haworth-village.org.uk/events/haworth-events/pictures/pictures.asp?top=Fair%20Intents&cat=Ecofair%202010#

Another dude powering a cycle generator – http://www.haworth-village.org.uk/

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