From 59ea5e02f76a37e5021c5f9d02af149e48e7c07c Mon Sep 17 00:00:00 2001 From: tmk Date: Sat, 19 Jul 2014 02:33:23 +0900 Subject: Mkdir rn42 --- keyboard/hhkb_rn42/MEMO.txt | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'keyboard/hhkb_rn42/MEMO.txt') diff --git a/keyboard/hhkb_rn42/MEMO.txt b/keyboard/hhkb_rn42/MEMO.txt index 36d4afb98a..100b4442d6 100644 --- a/keyboard/hhkb_rn42/MEMO.txt +++ b/keyboard/hhkb_rn42/MEMO.txt @@ -2,6 +2,7 @@ Roving RN-42 ============ 07/16 After fix of voltage dividor on GPIO6, had a trouble that it could not send a char to BT module, though could receive. Found R8 had wrong 1K resistor and changed to 10K, after that it can send to the module again. Not sure how it had sent with the wrong 1K before. +07/18 On Linux, had an USB related trouble; keyobard or console didn't work for some reason. Changing PID cured this problem. Very annoying, took very long time before resolved it. @@ -28,6 +29,28 @@ DONE: - Power selector doesn't work; Q4 MOSFET leaks from Lipo to USB power line. -- use Schottky instead 07/04 +Lipo +---- +Sparkfun Polymer Lithium Ion Battery 850mAh: +https://www.sparkfun.com/products/341 +Lipo Cell spec: +https://www.sparkfun.com/datasheets/Batteries/063048%20Li-polymer.pdf +Protection spec: +http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Prototyping/BatteryProtection.pdf + min typical max +over-charge 4.255 4.280 4.305 +over-charge discover? 4.030 4.080 4.130 +over-discharge 2.827 2.900 2.973 +over-discharge discover 3.022 3.100 3.178 + +ADC voltage monitor: voltage divider 10K+10K(0.5) + ADC=V*0.5/2.56*1024 + V ADC + ------------------ + 4.20 0x347(839) + 3.10 0x26b(619) + + Configuration -- cgit v1.2.3