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Hand Crank Generator / Battery Charger
You're welcome seamster!
Handmade Rustic Looking Sign
Very cool. Nice to see what you've done. Thanks for sharing this :)
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Multi-use indestructible garden Tool
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Thank you Shiseiji for the nice comment. I think a lot of us tend to have a bad reading day sometimes.Thank you again for the feedback.
Ah, a perfect voltage! If you mentioned it earlier, I apologize for overlooking it. I saw one picture, on the web?? Here?? there the author had used bundle ties to put one on a bicycle chain (lower) stay. Just mentioning in case someone stumbles across this as an "not-quite-so-portable" option. I have several things that detractors pointed out the flaws from their point of view. While completely disregarding what I had as my criteria. Some was good, but most was irrelevant. You obviously experienced some of that, but took what you could use and said politely No thanks." to the rest. Hope to see more of your work.Ron
DUH, you had it in plain sight at the bottom. Chalk it up to a really bad reading day.
Hi Shiseiji, I can see your point now about the 19 volts, As I was testing it I found that I couldn't get the drill to put out more then 13.85 volts. I had it clamped down to the workbench and was turning it as fast as I could. The drill has two speeds Hi and Low, I used the High setting all the time since I could not get it to turn when it was set to Low, The gearing in drills on the the Low setting is for more torque and less speed ( from my own experience using cordless drill). One could probably get the 19 volts out the drill if it was hooked up to a larger flywheel or some kind of bicycle arrangements as some other commenters have suggested, both valid ideas by the way, but then I would lose the portability and that's what I was aiming for. Thank you for your comments though, it's always good to have another set of eyes look at something and give some ideas.
Put the grinding wheel against a bicycle tire. - Mark 42
John, my primary point is that 19v volts will damage a 12v battery. Desperate times can call for desperate methods, one time probably won't kill it, but the cost has to be weighed.I grew up outside what's now the Marine Corps Logistics Base Barstow, and knew several people involved in military sales, including my brother. Yes, times change. Sometimes good deals can still be had, I have a couple of first editions courtesy of being being willing to buy a "pallet box" (47-1/2" x 39-1/2" x 28") of books in the hope something good might be in there. Auctions . . . yes "but" (Behold the Underlying truth), since the late 80's most of the decent lots are purchased by deep pocked folks who can afford to out bid the smaller bidders till they give up and quit coming to the auctions . . .Regardless, I've never seen a military hand generator voltage that could be used for charging anything. The idea to use a military hand crank generator has several assumptions that aren't valid. Since some people aren't given to doing much research, I decided to speak up rather than let invalid assumptions stand. If someone knows of a military hand-crank generator that produces a usable voltage, I'm very interested. There are Chinese ones hitting the market ~ $300 USD as of this date, that produce high (430V, 130 mA) and low voltage (6.3V, 2 A). Not real useful for charging a battery or other common use electronics. Use what you can and forget the rest.Just my $.02Ron - Shiseiji
Thank you again tmspro.
Sadly, 1. They tend not to be cheap. In your browser of choice query: "military" hand crank generator2. The outputs are not common. I.e. Output: 162vdc @ 60ma & 3.1v @ 300ma. The infamous "Gibson Girl" kite antenna radio generator produced 24v and 330v for the tube radio. - Shiseiji
Shiseiji - more of a suggestion/query than anything else. The hand crank looked to be ideal for what John wants to do, but, I haven't bought any military surplus for at least 40 years (no need or interest), so not up on current prices. One more option: long ago, non-functioning military/government equipment could be purchased for a bit more than scrap value. If that is still possible where you live, and if the crank mechanism is good, should be possible to cobble up some brackets and replace a non-functioning military generator with one from a car. - tmspro
Thank you KipA2, I'm glad you realized why I had done that, It's not original on my part though, I'm sure I saw it somewhere else. Good luck with your old drill project.
I love this. Not because it's overly useful, but because it could be. The spring coupling is a golden idea as well, eliminating the need for precision alignment as well as providing some shock absorption for a potential rapidly varied load. And I have an old drill . . .
Thanks for your comment Shiseiji, but I'm not quite sure what your point is. As I explained to other people's comments and in the Instructable I wanted to see if I could get enough voltage out of the drill / hand crank set up to charge a battery, with this portable setup.In a later test I could. When I have time I'll post the results and maybe another video. Thanks again for the comment and the links though, I'll check the links out.
Suggest you check prices on surplused military generators . . .
Battery charging: From my long ago automotive schooling, automotive alternators acceptable output is 13.5 ~ 14.6 vdc. 19.5 is too high for an automotive battery. This 'struable might be adapable:http://www.instructables.com/id/Solar-Battery-Charger-For-Your-Cordless-Power-Tool/Bike generators: Check out http://makezine.com/projects/the-drill-rod/ and think old school friction wheel like the 5w bicycle bottle generators used rather than a chain. Mount the motor on the chain stay and a friction wheel of sufficient size. Tire sidewall rather than the cap.
From my long ago automotive schooling, automotive alternators acceptable output is 13.5 ~ 14.6 vdc. 19.5 is too high for an automotive battery. This 'struable might be adapable:http://www.instructables.com/id/Solar-Battery-Charger-For-Your-Cordless-Power-Tool/ Check out http://makezine.com/projects/the-drill-rod/ and think old school friction wheel like the 5w bicycle bottle generators used rather than a chain. Mount the motor on the chain or seat stay and a friction wheel of sufficient size.
Thank you Crossforge, good suggestion, but I'll stick with the grinding wheel, by putting the tool rest back on and loosening the drill chuck I would have a portable grinder for sharpening tools as well as having a battery charger.
Nice idea and you've proved the theory is sound so good job.Maybe you could have a word with a local gym and wire up your remaining drills to the treadmills etc. Free electricity! :)
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