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README: add design choice for other versions

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King Kévin 2021-12-08 16:26:04 +01:00
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README.md
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@ -55,6 +55,20 @@ All details are in the schematic.
design choice
=============
v2
--
- LEDs have the same brightness
v1
--
- production friendly design (not through hole devices, or double sided load)
- each LED/status should have a unique color
v0
--
- the connectors need to have through hole mounting tabs to ensure they don't break from the board, particularly the micro-B receptacle.
- to power the LEDs I used small batteries I had around: CR2032. They are plenty sufficient to power LEDs, especially because I provide them with less than 0.5 mA. Thus the battery should last testing cables for years, unless you leave them plugged in.
- to keep the board small, I decided to put the battery holder on the back of the board. This requires you to solder it last, else it would cover the hole for the USB-A receptacle.