Generating electricity:
- solar panels (http://www.sunshinesolar.co.uk/khxc/gbu0-prodshow/SS20W.html) - covers March to September,
- total of 200W, placed on the inside, half facing east, half facing west,
- generator bicycle - for when the sun doesn't shine (enough), see below.
- 18V power supply - for when there is no sun and i didn't use the generator bicycle enough.
Storing electricity:
Electricity usage:
- computer running 24 hours a day:
- extreme low power, needs approx 5Ah @ 12V a day
- headless AMD Geo based, Voyage Linux (http://linux.voyage.hk/)
- used for sensor readings (temperature, humidity, solar charger info), wiki etc
- lights - phase 1:
- low power led lights
- 2x
480 led lightstrip (5 meters), 1x 120 led lightstrip (1 meter) for
general light (don't see the ones i got on ultraleds anymore):
- 1x 24 led as reading light
- 1x 24 led as desk light for the hobby room
- lights - phase 2:
- in progress, still need to do all the other lights... got some bits already:
Generator bicycles
First of all the answer to the question why?:
- it's fun!
- good excuse to put in an hour of exercise a day or so when the sun doesn't shine
Bicycle 1:
- BH Fitness ZTX
- removed the magnets to make that that doesn't cause any resistance
- 120W electric motor (24V, 3500 rpm, 66% efficient)
- Brooks B66 saddle (http://www.brookssaddles.com/en/Shop_ProductPage.aspx?cat=saddles+-+city+%26+heavy+duty&prod=B66)
- 80-90 revs gives approx 24V, the solar charger gets 5A @ 14V
- i'd prefer 60-70 revs, so 80-90 is hard work
- the motor gets quite hot so now have put a 0.84W, 12V fan on it
- to drive the motor:
- one of my old bread making machines donated the belt and gear
- gear is mounted on the flywheel
- not sure how long the gear and belt will last, have one more spare bread machine...
- status: operational
Bicycle 2:
- Apollo Unleashed (as it's now strapped to a wooden frame)
- 18 speed (fixed to highest possible gear to reduce energy loss of the gear changer etc)
- i've
left in the front suspension, replaced the frame suspension with with
bit of wood (again reducing energy loss), removing the fork would make
it a bit shorter...
- 240W electric motor (MY1016, 24V, 2650 rpm, 75% efficient)
- back wheel is 22"x2" wood - maybe not heavy enough, have 60kg in weights lying around in case i want to build a heavier one...
- i never realised how hard it was to make a perfectly round bit of wood for the belt that drives the motor:
- tried using a handsaw - at least 5mm off in places
- tried using a jigsaw - better ... only 4mm off in places
- added a jig to the jigsaw - four broken sawbits later ...i guess you could call it a tapered oval
- drill stand, couple of jigs and finally it's circular!
- just ordered a Brooks B33 (http://www.brookssaddles.com/en/Shop_ProductPage.aspx?cat=saddles+-+city+%26+heavy+duty&prod=B33)
- waiting for new pedals and toe clips (same order)
- status: experimental
A couple of photos: