Thanks again for your input.<p>For info on how it was eventually worked out, see page 57 February 2005 QST (well, page 58, Fig.4 actually).<p>
...and my brother would appreciate your vote : <p>http://www.arrl.org/members-only/qstvote.html?pidx=0<p>
73<p>[ January 22, 2005: Message edited by: cato ]<p>[ January 22, 2005: Message edited by: cato ]</p>
Charging 12V Battery while riding Bicycle
Re: Charging 12V Battery while riding Bicycle
parallel two 6 volt batterys for charging then series them for 12 volts discharging<p> joe
- Chris Smith
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- Location: Bieber Ca.
Re: Charging 12V Battery while riding Bicycle
One tiny stepper motor put out around 30 plus volts, problem solved for any voltage.
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Re: Charging 12V Battery while riding Bicycle
Chris, the only experimentation with steppers that I've done is to electrically interconnect two healthy identical ones together to let one drive the other like an old synchro-servo system (and that was just for amusement) and to use one as a quadrature generator replacing a rotary encoder (more serious work). It would make sense that if one can drive another, they must be able to output a healthy current. But when just playing with them as possible input devices, I noticed that a big one can output a waveform in the hundreds of volts p-p but are quickly quenched with a load.<p>So, since I haven't played with them as power generators and don't have one handy at the moment to experiment with, what kind of current/power is a hefty stepper capable of?<p>Dean
Dean Huster, Electronics Curmudgeon
Contributing Editor emeritus, "Q & A", of the former "Poptronics" magazine (formerly "Popular Electronics" and "Electronics Now" magazines).
R.I.P.
Contributing Editor emeritus, "Q & A", of the former "Poptronics" magazine (formerly "Popular Electronics" and "Electronics Now" magazines).
R.I.P.
- Chris Smith
- Posts: 4325
- Joined: Tue Dec 04, 2001 1:01 am
- Location: Bieber Ca.
Re: Charging 12V Battery while riding Bicycle
Dean a few months back in NV there was a simple article showing the stepper motor used as a generator, into a super cap, for a hand crank type flash light. <p>The four diode bridges into a cap give it the load and like a alternator and battery, it becomes [semi] self regulating. <p>For a small battery, Even though the voltage can peak quite high, the current and voltage "follow" the batteries command of X ohms internal resistance = a normal trickle charge. <p>5-1/4 Large floppy drives which are now almost obsolete have great little stepper motors making finding one pretty easy.
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