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Me making a printed circuit board: There’s room for improvement …
↓↓↓ Complete description, time index and links below ↓↓↓
Note that this is not a tutorial. It’s just a video showing my current process of making single layer PCBs. If it entertains you - good. If you learn something - even better. If you have suggestions for improvements - the best possible outcome (for me)!
Anyway, the video covers everything from the finished PCB design to a PCB ready for soldering. In real time it took me a little less than two hours (including a minor hiccup). For your convenience I’ve condensed it down to 42 minutes.
►Intro
00:00 Intro - how to get from raw PCB material and a design to a PCB ready for soldering
►Exposure Mask
00:31 Printing - two copies on a laser printer (non-mirrored, toner will touch PCB)
01:00 Spraying - the copies with density spray to improve - well - density
01:24 Cutting - the two copies to size, one a little smaller than the other
02:12 Aligning - the two copies on top of each other
►PCB Raw Material
03:31 Cutting - on the table saw with a diamond coated blade
►Expose & Develop
06:09 Aligning - exposure mask and PCB material
07:38 Exposing - the PCB material in my UV exposure unit
09:00 Mixing - the developer solution from sodium hydroxide (caustic soda, lye)
11:15 Developing (i) - failed, photoresist didn’t come off as planned
16:15 Developing (ii) - succeed, well it was good enough
►Etch
21:18 Mixing - the etching solution from sodium persulfate
23:01 Etching - the exposed and developed PCB material
►Expose & Develop Again
27:59 Exposing & developing - a second time to get the photo resist off
►Intermediate Result
30:55 Inspecting - the etched PCB
32:02 Reviewing - the PCB from the failed exposure & development
►Drill & Mill
33:16 Plan - for drilling and routing the PCB
33:56 0.8mm holes - drilled with diamond coated drill bit
34:38 1.0mm holes - drilled with diamond coated drill bit
34:53 1.2mm holes - drilled with diamond coated drill bit
35:01 1.5mm holes -drilled with diamond coated drill bit
35:26 1.2mm slots - drilled and milled with diamond coated drill bit
37:03 1.0mm slots - drilled and milled with diamond coated drill bit
37:39 Freehand 1.2 mm slot -because I forgot it in the PCB design
38:38 3.0mm holes - drilled with regular HSS drill bit
38:51 Unmarked 2.5mm holes - drilled using a paper template
►Coat
40:27 Spraying - the PCB with some flux/protection coating
►Wrap-Up
41:24 Inspecting - the finished PCB
42:00 Wrap-up - from design to PCB in under 2 hours
UV Exposure Unit Build • UV Exposure Unit Build
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