Posted by Jim Wilkins on March 18, 2012, 12:28 pm
> On Fri, 16 Mar 2012 22:35:14 -0500, "Daniel who wants to know"
>>> Yes, I know about that, but this is not in the US, I want one in
>>> the UK,
>>> it will cost a packet to import the bits.
>>> Brian
>>
>>If I were going to make a pedal generator I would use the motor and
>>gearbox
>>assembly from an electric wheelchair. ...
> ...A 200W DC motor from a child's 24V electric scooter was
> held against the rear tyre and driven by friction. ...
> AJH
Ah, another good item to watch for at yard sales. I used to repair
power wheel chairs and other medical devices and have mixed feelings
about diverting their still-useful repair components to other
purposes. For various reasons not all users quality for government
help.
Posted by Winston on March 18, 2012, 4:54 pm
Jim Wilkins wrote:
(...)
> Ah, another good item to watch for at yard sales. I used to repair
> power wheel chairs and other medical devices and have mixed feelings
> about diverting their still-useful repair components to other
> purposes. For various reasons not all users quality for government
> help.
Not to worry. Bicycle power generation is a nanoscopic market.
In my yout, I actually tried to maintain ~70 W into a
bicycle crank over an extended period of time. Best I ever
did consistently was about 30 minutes. Then I was All Done.
I could not have done that unless I was in the breeze
of my trusty *90 W* fan. :)
--Winston
Posted by Jim Wilkins on March 18, 2012, 5:31 pm
> In my yout, I actually tried to maintain ~70 W into a
> bicycle crank over an extended period of time. Best I ever
> did consistently was about 30 minutes. Then I was All Done.
> I could not have done that unless I was in the breeze
> of my trusty *90 W* fan. :)
> --Winston
I really need only 30W to maintain a battery powering this laptop or
my 22" HDTV. A USB flex light is enough to illuminate the keybard to
type when the room lights are off. 50W would be the goal, though I
might design the frame and drive for 500W, which I can't maintain very
long if at all.
This would be my model, a foot-powered lathe meant for continuous
duty, unlike a sewing machine where you stop at the end of each seam.
http://www.manytracks.com/lathe/default.htm
I don't think I could pedal a crank and type at the same time, but the
treadle drive is well proven for delicate work.
jsw
Posted by Winston on March 18, 2012, 6:31 pm
Jim Wilkins wrote:
(...)
> I really need only 30W to maintain a battery powering this laptop or
> my 22" HDTV. A USB flex light is enough to illuminate the keybard to
> type when the room lights are off. 50W would be the goal, though I
> might design the frame and drive for 500W, which I can't maintain very
> long if at all.
> This would be my model, a foot-powered lathe meant for continuous
> duty, unlike a sewing machine where you stop at the end of each seam.
> http://www.manytracks.com/lathe/default.htm
> I don't think I could pedal a crank and type at the same time, but the
> treadle drive is well proven for delicate work.
I think you mentioned using a stepper motor
as a generator in a wind charger application.
That, combined with your PV panels sounds like a
valuable parallel wattage source for your
treadle genny.
--Winston
Posted by Jim Wilkins on March 18, 2012, 10:25 pm
> Jim Wilkins wrote:
> ...
> I think you mentioned using a stepper motor
> as a generator in a wind charger application.
> That, combined with your PV panels sounds like a
> valuable parallel wattage source for your
> treadle genny.
> --Winston
Actually I have reject Segway parts for mine. They encouraged us to
play, occasionally on company time.
http://wiki.answers.com/Q/Who_invented_the_Segway_Centaur
They can't (and definitely shouldn't) go into customers' machines, so
don't ask.
>>> Yes, I know about that, but this is not in the US, I want one in
>>> the UK,
>>> it will cost a packet to import the bits.
>>> Brian
>>
>>If I were going to make a pedal generator I would use the motor and
>>gearbox
>>assembly from an electric wheelchair. ...
> ...A 200W DC motor from a child's 24V electric scooter was
> held against the rear tyre and driven by friction. ...
> AJH