Uploaded December 2019 | Updated September 2026, 1 week ago
Home made metal mini lathe update before Christmas, this time I've made the slides for the saddle, using an alternative method to welding, to avoid distortions and tensions in a part that should be stable and being made from cold rolled mild steel it benefits from the good dimensional standard this kind of stock material have. Before the slides will be “cold welded” (it is not true cold welding) with the transverse that will host the ways for the cross-slide, a temporary transverse bar will be bolted to install a makeshift rig to hold an angle grinder to try to cut the dovetails for the cross-slide ...not sure to succeed in this though, so be sure to follow the next episode that will follow a couple of video that will cover some cool electronics and an experiment of electronics applied to mechanics.
To see the full series watch this playlist: youtube.com/playlist?list=PLwbCeSU2Kq_wrUUInSUWJksA-LHhhMhFx
The previous part 4: youtube.com/watch?v=CFrLxt86B24
== Music ==
Waltz of the Flowers - Tchaikovsky
Up on the Housetop - E's Jammy Jams
Home made metal mini lathe update before Christmas, this time I've made the slides for the saddle, using an alternative method to welding, to avoid distortions and tensions in a part that should be stable and being made from cold rolled mild steel it benefits from the good dimensional standard this kind of stock material have. Before the slides will be “cold welded” (it is not true cold welding) with the transverse that will host the ways for the cross-slide, a temporary transverse bar will be bolted to install a makeshift rig to hold an angle grinder to try to cut the dovetails for the cross-slide ...not sure to succeed in this though, so be sure to follow the next episode that will follow a couple of video that will cover some cool electronics and an experiment of electronics applied to mechanics.
To see the full series watch this playlist: youtube.com/playlist?list=PLwbCeSU2Kq_wrUUInSUWJksA-LHhhMhFx
The previous part 4: youtube.com/watch?v=CFrLxt86B24
== Music ==
Waltz of the Flowers - Tchaikovsky
Up on the Housetop - E's Jammy Jams
![The mindblowing #photoacoustic effect: #light makes materials to play #sound! - [Redone video]](https://i.ytimg.com/vi/zIQXlf1qLsM/mqdefault.jpg "The mindblowing #photoacoustic effect: #light makes materials to play #sound! - [Redone video]
A piece of fleece generates sound just projecting a modulated light! No electronics involved! (Aside the light modulator.)
*This plays sound JUST with light!*
I reproduced an experiment that led to the definition of the photoacoustic effect. This effect has been first discovered by Alexander Graham Bell, the inventor of the telephone and of the photophone. While this effect is widely exploited in photoacoustic spectroscopy, it is often overlooked by many.
So with this video I bring it to light ...so to say :-)
After a first failure in reproducing the experiment, after some research I managed to achieve results.
Encouraged, I developed a special #LED driver. The final result is amazing: a simple piece of fleece emits #music just for the radiated modulated light!
The effect is regarded to be caused by light induced thermal expansion and contraction of materials.
In doing this experiment I also stumbled upon a weird response from a piezoelectric sensor, with an unexpected and interesting effect that I showcased in a bonus extra section of the video.
Remark: This video has been redone because of missing content and technical issues in the originally posted video.
Full series of #Experiments: https://www.youtube.com/playlist?list=PLwbCeSU2Kq_wbNEUGGWLkCgvLpUz3eP-k
Full series of #Electronics: https://youtube.com/playlist?list=PLwbCeSU2Kq_zORt4un2iQ3JUYxzWF3cTJ
Visit the website: https://accidentalscience.com")
