Lab #3: Cutting conductors on outer and inner layers

In this video, I demonstrate how to cut conductors on a PCB using a high-speed rotary tool (for both outer and inner layers) as well as a scalpel (for outer layers only).
At the end of the video, I demonstrate in real time why trying to use a scalpel to perform an inner-layer trace cut is ill-advised. It can be done in an emergency if you don't have better tools available but is difficult, extremely time consuming, and produces an inferior result.
Reference material:
* Outer layers: www.circuitmedic.com/guides/4-...
* Inner layers: www.circuitmedic.com/guides/4-...
Changes to my recording/production process since last time:
* Replaced the 5+ year old webcam used for closeups with my phone
* Applied dynamic range compression to audio after background noise subtraction and normalized to 0 dB

[@AndrewZonenberg]

Sorry about the black screen during the intro. There was supposed to be a long shot of me talking at the lab bench and somehow that got deleted without me noticing... Guess this is what happens when I edit video at 3AM. Also at 5:20 I meant the bus changes from layers 3 to 4, not 2 to 3.

[@KeithMakank3]

go dr z!

[@smunaut]

Nice videos ! Thanks for sharing those tips / technique. Audio is a bit on the quiet side though, so might be worth boosting a bit :p

[@AndrewZonenberg]

I actually boosted it as far as I could without clipping *and* applied some range compression to make the narration even louder. The dynamic range is massive between the quiet ambient, me talking, and the louder sounds like the power tools and compressed gas. If I don't mind clipping the spray sounds I could probably add another few dB of gain, though.