Life on FR4

!!!Allwinner A31!!! Quad-Core 64 Bit ultra cheap SoC for everyone!! Yeah sound good...but the truth are awful is some case . First of all do you know about the Banana Pi M2?The Banana Pi M1 (A20) was the killer of the first generation Raspberry pi . After the second generation Rpi was released the Bpi m2 was released too . But where is it ? The Bpi m2 was a huge fail (M3 was changed the M2 very soon) . Nobody care about the A31 SoC linux support . No community,no projects,hack or any interesting thing about this mini ARM board. And what about the android support? Little bit better but not in all case. My new target is a A31 SoC based tablet with nice screen and big battery . But something wrong because I can't turn on.And my journey started here. I took it apart and try to locating the wrong parts.I started on the power rails : Sorted Main Board WorkBench  APX221 is a dedicated Power Management Unit for A31 SoC. You can find a lot of informations  on sunxi linux...

OP3n DOTT ?! WTF ... newest company "from china with love". Promoting nice 8" Intel CPU based tablet and smartphone, both with android. And here is some accessories for their smartphone and tablet,bluetooth headset BT 4.0 Integrated MIC NFC sounds good!Get one and take a part. What's under the hood?The Op3n dott don't want to reinvent the wheel. As you can see he used the well known CSR-8635 module. Limited Datasheet and tools for flashing available on the net,not bad! And what about the sound quality?Not too bad but if you want to get some nice quality tones probably you will be disappointed. Keep in mind this is a 35$ BT headset :D Luckily I have a lot of headphones and headset parts. For example a  pair of sennheiser HD-180 headset speakers,and this is much better that the original ones. The stock speaker The stock speaker Truly integrated speaker by Sennheiser.This was fluid XD? upgraded speaker Now the sound quality ...