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Controlling speed of DC Motors using Arduino
Great idea, this has really got me thinking! Well done!
Interesting, this relates to something I have been thinking about. It would be good to get a constant speed motor control by sensing the back emf from the motor (which corresponds to speed) in between pulses, and using this to modify the pulse width so that the b.emf and therefore the speed is made constant. I am not clever enough to do this myself!
Fire Piston (Made From Aluminium)
OK but I'm not sure how I can use it to help my students if their English isn't very good. Next ible - how to use it with students?
Wow, you have done a fantastic amount of work on this!! Well done!
You can still get analog photo film, film cameras and processing, but nowadays people are calling it lomography....
Hi Stan,For your book of stereo photos, it is possible to train your eyes to view them with no equipment. They are often printed about the same distance apart as your average eyes (PD). If you hold up the page and look at the world beyond, your eyes will more or less look straight forward and with practice you can look down and see the images without your eyes re-adjusting. Each eye has to see the same thing in the other image so that the automatic tracking system you have keeps the feature in alignment. Once you have learned this is becomes very easy to do spot-the-difference puzzles. It is easier if you have lenses (like the viewer) to fool your eyes into adjusting to the infinity setting, you could try using a couple of identical magnifying glasses, maybe take apart some cheap ...see more »Hi Stan,For your book of stereo photos, it is possible to train your eyes to view them with no equipment. They are often printed about the same distance apart as your average eyes (PD). If you hold up the page and look at the world beyond, your eyes will more or less look straight forward and with practice you can look down and see the images without your eyes re-adjusting. Each eye has to see the same thing in the other image so that the automatic tracking system you have keeps the feature in alignment. Once you have learned this is becomes very easy to do spot-the-difference puzzles. It is easier if you have lenses (like the viewer) to fool your eyes into adjusting to the infinity setting, you could try using a couple of identical magnifying glasses, maybe take apart some cheap opera glasses or binoculars... Method 2: copy the pictures and separate them so that you can put the left on the right and the right on the left. Put them down on the table. Hold your finger in front of them and look at that, move it up and down until the pictures seem to align and transfer your attention to the pictures. This way your eyes are pointing together like for close work so it is a bit more natural but each eye sees the picture on the opposite side, which is why you have to swop them over. This is all much easier to do than to describe! Have fun!
Nice technique! But for someone who doesn't know, what actually is Mod Podge? Is it PVA glue perhaps?
That's really nice. Well explained, thank you.
Very elegant design, well done! And I have some oak veneer somewhere...
Hi Bill, and Dicorn,Many thanks for your thanks, it's good to know this works for people. I must have been in a funny mood when I wrote it, but I had saved a wodge of cash and was very pleased! The machine is still going.
This candle is wicked!You've got me thinking. My guess is that you need to get more air into the flame somehow, to improve on the lost energy. Maybe some kind of ring shaped candle that can let air into the middle as well as round the edge. Many ordinary wicks perhaps? And I wonder if actually it would be worth dealing with the absorption of heat into the pan, as a lot of the hot gases produced will miss the target, and something about the loss of heat from the top and sides of the pan? Maybe try an energy saving kettle that has copper coils on the bottom.
Could use a little more detail around step 4! You can get back in and edit your ible, it's not too late. Looking forward to it!
Interesting! But if you have enough space for a mirror, wouldn't it be better to put in another solar panel? Depends on the relative costs, but I don't have the data to work it out. Also, both the mirror and the panel stop the space from being used to grow crops which absorb CO2 and store energy in a neat way - has anyone done the sums on that alternative?
Great set of ideas! I will be trying some of these!
Laser cut puzzle collection
Desoldering - I use a nice desoldering tool given to me by a TV repair man about 40 years ago. It consists of a hammer from a piano (as a handle) with a piece of stainless steel wire stuck in the end. When you desolder, you can push it through the hole to clear it. The solder gets on the end of the wire then falls off when you pull it out.
Great stuff, I wish there was a thread generator in 123D!
DIY Concrete Lamp - Led String Light
dukta with laser cutter
Laser Cut Air Horn
Really nice job! There has to be a way of reducing the burning without using tape, that is too much of a hassle. Acrylic doesn't burn when you laser it, maybe acrylic lacquer would be worth a try (wait till I get to the Fab Lab next week!)BTW I do a lot of jigsaw puzzles and I think it would be a even better if you could vary the shapes of the pieces so they are not all H's and not all interchangeable. I know it's a lot of work!
Laser Cut Hinged Wooden Box (4"x4")
Great ible, very nice video. You have a great set of machines there, maybe could use some better guards!I thought you might be interested in something I made, similar but different, done with slots each side at right angles, no drilling. The slots can be seen but it can make more flexible shapes. I did it by hand!
Custom Fitted 3D Print Glasses
Use Guitar Strings on Your Ukulele
HOW TO: Use Old CDs for Mosaic Craft Projects - DIY Kitchen Backsplash Tips and Tricks
Embedding hardware into 3d Print
Cartouche: Wooden Heart Locket
Up-Cycle Junk Mail into Artisan Paper
Encased - Body Shaped Leather Lugguge
3D Design and Printing using Free Software
CHEAP vacuum forming with plastic bottles
Turn *any* Video into a 3D Model
Make a Mold for your sculpt or 3D print!
Yet Another DIY Diode Laser Engraver
Wooden Puzzle: Six Blocks in a Box
Japanese Folding Paper Puzzle
Nut And Bolt Puzzle
DIY Smartphone Film Scanner
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