Uploaded April 2024 | Updated September 2026, 1 week ago
How to spot a fault on an electronic board following a methodological approach in 7 steps.
Stop blinding guessing what a fault could be, follow the path and a method to spot faults with awareness.
This video is inspired by the several comments on my previous video on this topic that you can find here: youtube.com/watch?v=ye9dguKy_Cs
With this presentation my hope is to provide an answer to all those questions.
Table of content
1:15 Gather information, from technicians on field and from other sources
3:19 Visual inspection, spot macroscopic causes of failure
4:04 Set up proper testing environment to reproduce fault and taking measurements
5:21 Check power rails on circuit board
6:07 Follow the path backward from faulty outputs
7:22 Check for consistency between voltages and currents and components involved
13:33 Intermittent faults, artificially stress to reveal hidden faults
For more related/complementary content over my videos please visit my website accidentalscience.com.
Watch the full series of electronics: youtube.com/watch?v=ye9dguKy_Cs&list=PLwbCeSU2Kq_zORt4un2iQ3JUYxzWF3cTJ
Follow me on Facebook or Instagram
Website: accidentalscience.com
How to spot a fault on an electronic board following a methodological approach in 7 steps.
Stop blinding guessing what a fault could be, follow the path and a method to spot faults with awareness.
This video is inspired by the several comments on my previous video on this topic that you can find here: youtube.com/watch?v=ye9dguKy_Cs
With this presentation my hope is to provide an answer to all those questions.
Table of content
1:15 Gather information, from technicians on field and from other sources
3:19 Visual inspection, spot macroscopic causes of failure
4:04 Set up proper testing environment to reproduce fault and taking measurements
5:21 Check power rails on circuit board
6:07 Follow the path backward from faulty outputs
7:22 Check for consistency between voltages and currents and components involved
13:33 Intermittent faults, artificially stress to reveal hidden faults
For more related/complementary content over my videos please visit my website accidentalscience.com.
Watch the full series of electronics: youtube.com/watch?v=ye9dguKy_Cs&list=PLwbCeSU2Kq_zORt4un2iQ3JUYxzWF3cTJ
Follow me on Facebook or Instagram
Website: accidentalscience.com
![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")
