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Category: Hobby

Posted onMay 14, 2025May 17, 2025Hobby

Fixing CEPH OSD “Down” and “Out” Glitch After Power Outage

by XuemingLeave a comment on Fixing CEPH OSD “Down” and “Out” Glitch After Power Outage

I have been running my home server on a mini setup of a CEPH system, which is composed of three monitors and six OSDs. The monitors are running off SBCs…

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Posted onNovember 12, 2015February 28, 2025Electrical Engineering

Teardown of Ricoh Theta 360 Degree Spherical Panorama Camera

by Xueming49 Comments on Teardown of Ricoh Theta 360 Degree Spherical Panorama Camera

The first impression of the Ricoh Theta 360 Degree Spherical Panorama Camera is its odd appearance — to me it feels like a bar of chocolate wafer. The dual lens reminds me…

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Posted onOctober 28, 2012June 13, 2020Electrical Engineering

Save money on PCB fab and how to cut the board apart with CNC mill (or table saw, press drill).

by Xueming3 Comments on Save money on PCB fab and how to cut the board apart with CNC mill (or table saw, press drill).

For lab geeks or hobbyist who often sends out small quantity PCB fab orders but doesn’t care about a little bit extra work, this  post will help save a decent amount of…

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Posted onApril 29, 2012June 11, 2020Electrical Engineering

Extend the 3D stereo camera module of LG thrill phone P925

by Xueming34 Comments on Extend the 3D stereo camera module of LG thrill phone P925

This is a quite interesting project which requires digging out the 3D stereo camera module from the LG thrill P925 smart phone and driving it somewhere outside the smart phone.…

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  • PIC32MZ USB NO Harmony
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Recent Posts

  • Fixing CEPH OSD “Down” and “Out” Glitch After Power Outage
  • Programming the USB module of PIC32MZ without Harmony (7) – Put USBDMA to work
  • Programming the USB module of PIC32MZ without Harmony (6) – USBDMA
  • Programming the USB module of PIC32MZ without Harmony (5) – Endpoint Configuration
  • Programming the USB module of PIC32MZ without Harmony (4) – Descriptor
  • Programming the USB module of PIC32MZ without Harmony (3) – Setup and Configuration as USB device
  • pdf2img2pdf, A Python Code to Compress PDF files

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