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Posted onOctober 8, 2020October 12, 2020Electronics

Understand dsPIC33/PIC24 DMA Data Transfer Modes: One-Shot vs. Continuous vs. Repeated vs. Non-repeated

by XuemingLeave a comment on Understand dsPIC33/PIC24 DMA Data Transfer Modes: One-Shot vs. Continuous vs. Repeated vs. Non-repeated

You’re not alone if those four modes‘ names sound confusing to you. I spent some time digging a little bit deeper into the modes, and here is my understanding of…

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Posted onJune 9, 2020June 9, 2020Electronics

Altium Desinger Adding Net Name to Hidden Pin

by XuemingLeave a comment on Altium Desinger Adding Net Name to Hidden Pin

It used to be pretty straight forward to assign a net to a hidden pin of a component using the right-click property menus. However, this function has been relocated to…

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Posted onJanuary 25, 2017June 10, 2020Computers and Internet

OpenRISC(1): First run OpenRISC on de0-nano board

by XuemingLeave a comment on OpenRISC(1): First run OpenRISC on de0-nano board

The scope of the OpenRISC project is so extensive that it covers wild range of areas including processor architecture, implementation with register transfer language, simulation tool, synthesis tool, and tool-chain…

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Posted onApril 21, 2016June 9, 2020Others

Notes on PHP: Restart apache won’t reset php session

by Xueming6 Comments on Notes on PHP: Restart apache won’t reset php session

To be honest, it is a little odd that PHP session won’t be destroyed after Apache server got restarted. In order to truly kill the PHP session, especially during development, I created…

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Posted onDecember 15, 2015June 9, 2020Embedded

Drive computer vision camera (Point Grey) on single-board computer (Banana Pi)

by Xueming1 Comment on Drive computer vision camera (Point Grey) on single-board computer (Banana Pi)

Computer vision cameras come with extremely small size without too much compromise on image quality. They fill in the holes of a wide range of applications that conventional photography cameras…

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Posted onDecember 13, 2015June 9, 2020Electronics

How to rework small surface mount LED

by XuemingLeave a comment on How to rework small surface mount LED

I talked about soldering small surface mount LED in my previous posts by using DIY reflow oven. Today I would like to show you how to rework similar LED, which is,…

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Posted onNovember 12, 2015June 9, 2020Electronics

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 onNovember 1, 2015September 10, 2020DIY Cantilever Sliding Gate

DIY, how to build your own cantilever sliding gate (8) – Mount the fencing board!

by Xueming12 Comments on DIY, how to build your own cantilever sliding gate (8) – Mount the fencing board!

I’ve decided to decorate the sliding gate with fencing board from the very beginning. Now the posts were set, the gate was assembled, and the gate opener was installed and…

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Posted onOctober 28, 2015September 10, 2020DIY Cantilever Sliding Gate

DIY, how to build your own cantilever sliding gate (7) – Install the gate opener

by Xueming14 Comments on DIY, how to build your own cantilever sliding gate (7) – Install the gate opener

There is a wide selection of gate opener products available online or at local shop, The price would range from several hundred dollars to more than a grand. It is really hard to tell…

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Posted onOctober 25, 2015September 10, 2020DIY Cantilever Sliding Gate

DIY, how to build your own cantilever sliding gate (6) – Run the power cord through underground conduit

by Xueming4 Comments on DIY, how to build your own cantilever sliding gate (6) – Run the power cord through underground conduit

Gate frame is up, now it’s time to do the electrical work. First of all, I needed to have power on the site! After searching around the house, I decided to…

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Recent Posts

  • Understand dsPIC33/PIC24 DMA Data Transfer Modes: One-Shot vs. Continuous vs. Repeated vs. Non-repeated
  • Altium Desinger Adding Net Name to Hidden Pin
  • OpenRISC(1): First run OpenRISC on de0-nano board
  • Notes on PHP: Restart apache won’t reset php session
  • Drive computer vision camera (Point Grey) on single-board computer (Banana Pi)
  • How to rework small surface mount LED
  • Teardown of Ricoh Theta 360 Degree Spherical Panorama Camera

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