Interesting ending to the story
Why It Was Almost Impossible to Make the Blue LED
https://www.youtube.com/watch?v=AF8d72mA41M
Search found 10940 matches
- Mon Feb 12, 2024 12:53 am
- Forum: Off topic forum
- Topic: youtube
- Replies: 1512
- Views: 550081
- Sun Feb 11, 2024 6:31 pm
- Forum: Tools and Construction
- Topic: Odds and ends
- Replies: 1850
- Views: 827679
Re: Odds and ends
Some experiments but not much else. I guess it's a lot of weight to move unless perfected.
Test of a Two Inch Single Ball Bearing Motor
https://www.youtube.com/watch?v=Fxxp-VkKqsY
Large Ball Bearing Motion from Heat
https://www.youtube.com/watch?v=79Jl0g4Gz5Q
Test of a Two Inch Single Ball Bearing Motor
https://www.youtube.com/watch?v=Fxxp-VkKqsY
Large Ball Bearing Motion from Heat
https://www.youtube.com/watch?v=79Jl0g4Gz5Q
- Fri Feb 09, 2024 10:28 pm
- Forum: Tools and Construction
- Topic: Odds and ends
- Replies: 1850
- Views: 827679
Re: Odds and ends
The brass and aluminum spheres arrived today so I gave it a shot not knowing if they would work. Several metal trays didn't sustain so I thought the experiment was going nowhere but this pet bowl finally did. It's just strange how particular each metal is. So far my 30 mm 38 gram aluminum sphere has...
- Thu Feb 08, 2024 8:58 pm
- Forum: Tools and Construction
- Topic: Odds and ends
- Replies: 1850
- Views: 827679
Re: Odds and ends
Hey Mike, I bought this bag of tiny needle bearings and parts of some sort, a ring shaped bearing pictured sleeves over each end. Anyway shopping today from the Amazon overstock thrift store, the whole bag was 25 cents. One side of the center hole is wider, like for the head of a bolt instead of a p...
- Thu Feb 08, 2024 5:47 pm
- Forum: Tools and Construction
- Topic: Odds and ends
- Replies: 1850
- Views: 827679
Re: Odds and ends
What sorts of things are the hollow bearing balls used for or what do you use them for? They sound like something nice to have for special projects.
- Wed Feb 07, 2024 8:09 pm
- Forum: Tools and Construction
- Topic: Odds and ends
- Replies: 1850
- Views: 827679
Re: Odds and ends
Last night I tried a glossy 3/8 inch drive 3/4 inch long reach 12 point chrome vanadium steel socket which rolled back and forth inside a tri clover piece of three inch diameter sanitary pipe for about 13 minutes or so before stopping. Just another odd thing tried, roller bearing style. ha https://w...
- Wed Feb 07, 2024 7:48 pm
- Forum: Tools and Construction
- Topic: Odds and ends
- Replies: 1850
- Views: 827679
Re: Odds and ends
I ordered a few solid aluminum and brass ball bearings to try but they haven't arrived yet. It's you pay your nickel and take your chances. It's been a lot of trial and error finding what metals work with another. There's thermal conductivity, heat capacity, thermal expansion, and things like surfac...
- Tue Feb 06, 2024 11:24 pm
- Forum: Tools and Construction
- Topic: Odds and ends
- Replies: 1850
- Views: 827679
Re: Odds and ends
On the Rotation of Hollow Spheres of Metal by Heat (Article from 1858) https://www.tandfonline.com/doi/abs/10.1080/14786445908642729 Rotation of Metallic Tubes and Spheres by Electricity https://www.tandfonline.com/doi/pdf/10.1080/14786445808642519 Ball Bearing Motor http://kirkmcd.princeton.edu/exa...
- Tue Feb 06, 2024 8:20 pm
- Forum: Tools and Construction
- Topic: Odds and ends
- Replies: 1850
- Views: 827679
- Tue Feb 06, 2024 7:56 pm
- Forum: Tools and Construction
- Topic: Odds and ends
- Replies: 1850
- Views: 827679
Re: Odds and ends
I wonder if you could make a track composed of bimetal material and as a hot wheel motor rolled over it, the speed would be amplified instead of just an ordinary metal surface? Double Jumping Bimetallic Disc from Appliance Thermostat https://www.youtube.com/watch?v=_gWTheIHwbU Thermal Bimetal Window...
- Tue Feb 06, 2024 7:28 pm
- Forum: Off topic forum
- Topic: youtube
- Replies: 1512
- Views: 550081
Re: youtube
Maybe put a AA battery in a rocker, shorted with a high value resistor, so it heats until it dies? Or there are chem based hand warmers that might work. Sounds like it needs very little differential temp. Do you have an infrared thermometer to get a feel for the differential right before it stops w...
- Tue Feb 06, 2024 7:21 pm
- Forum: Off topic forum
- Topic: youtube
- Replies: 1512
- Views: 550081
Re: youtube
Maybe put a AA battery in a rocker, shorted with a high value resistor, so it heats until it dies? Or there are chem based hand warmers that might work. Sounds like it needs very little differential temp. Do you have an infrared thermometer to get a feel for the differential right before it stops w...
- Sat Feb 03, 2024 5:33 pm
- Forum: Tools and Construction
- Topic: Odds and ends
- Replies: 1850
- Views: 827679
Re: Odds and ends
Some fancy Trevelyan Rocker Apparel
https://collection-lhst.epfl.ch/?action ... ect&id=177
https://collection-lhst.epfl.ch/?action ... ect&id=177
- Sat Feb 03, 2024 3:11 pm
- Forum: Tools and Construction
- Topic: Odds and ends
- Replies: 1850
- Views: 827679
Re: Odds and ends
Another thought comes to mind pertaining to the electrically driven ball bearing motor. It touches on this Trevelyan Rocker article, how the two have some things in common you might say. Imagine a rocking/clocking motor with a make and break electrical contact that repeatedly adds heat to the rocker...
- Fri Feb 02, 2024 1:05 am
- Forum: Tools and Construction
- Topic: Odds and ends
- Replies: 1850
- Views: 827679
Re: Odds and ends
If I had some of these or metal bars instead of the wire commonly sold, it might be interesting to see what response they would have as or in a ball bearing motor.
https://www.dvidshub.net/image/856856/n ... ring-balls
https://www.dvidshub.net/image/856856/n ... ring-balls