That is just the perfect color!

A project log for LAMEBOY - another ESP12 handheld

fully portable ESP12 project with battery charging and power muxing

davedarkodavedarko 09/20/2017 at 11:509 Comments


jaromir.sukuba wrote 09/21/2017 at 07:44 point

I love the concept, as well as the results you have so far, but I find one thing mildly irritating - no clearance around PCB mounting holes.

You are not alone, I see it very often; the screws/bolts tend to chew into soldermask, uncovering the bare copper - allowing oxidation to digest the copper slowly - and may cause shorts or cutting tracers, if there are nearby. It is good to either leave clearance around the holes (like guys at raspberry pi did it)-

or use via to make the actual hole, with appropriate outed diameter, as I did it here, for example -

I use 3,2/6mm for M3 bolts or 2,7/5,5 for M2,5 bolts. Using vias for mounting holes I can decide whether to connect the vias to some other net (for grounding) or leave unconnected and PCB CAD will watch for proper clearance from other traces.

Anyway, thumbs up for this project.

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davedarko wrote 09/21/2017 at 12:00 point

Hey Jaromir, thank you for the feedback :) The screw holes are all 2.2mm for M2 bolts and the upper ones are in the "no copper because antenna"-area anyways. I've added two restriction circles of 2.5mm radius around the bottom hole (top&bottom layer) for the revision boards. I want them to stay purple, just for the look. 

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jaromir.sukuba wrote 09/21/2017 at 12:17 point

I saw some vias (are those vias?) around the hole on bottom right corner and I got triggered ;-) The purple mask is really strong, covering details.

And thanks for the tip to TPS2113A, looks like IC I needed many times.

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davedarko wrote 09/21/2017 at 13:04 point

@jaromir.sukuba  the vias are moved too ;) I saw this chip being used by @David Watts  on a livestream and thought that this chip might be better than a diode solution.

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Craig Hissett wrote 09/20/2017 at 21:42 point

Amazing work my man!

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davedarko wrote 09/20/2017 at 22:04 point

thank you :)

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Nolan Moore wrote 09/20/2017 at 17:18 point

I love it! That corner that holds down the board is genius. I've never made a full game nor have I picked up an ARDUBOY, but I'd love to make something on the LAMEBOY. I have a great idea for the RGG backlighting!

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davedarko wrote 09/20/2017 at 21:22 point

hehe thanks, sometimes necessity is the mother of invention ;) There was just no space for another screwhole. I will make some boards once I've finished the revision boards and software, then I'll get back to people who expressed interest :)

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Nolan Moore wrote 09/20/2017 at 22:44 point

Please do, I'll be keeping an eye on the project. I'm excited to see where you take it next!

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