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Category: Electrical Engineering

Posted onJune 9, 2020May 17, 2025Circuit Design

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, 2017February 28, 2025Electrical Engineering

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 onDecember 13, 2015June 9, 2020Electrical Engineering

How to rework small surface mount LED

by Xueming2 Comments 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, 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 onDecember 25, 2013May 17, 2025Circuit Design

Defining copper to drill hole clearance rule in Altium Designer

by Xueming7 Comments on Defining copper to drill hole clearance rule in Altium Designer

The “copper to drill hole” distance is an important rule for circuit board design, just like the “copper to copper” clearance. A PCB manufacturer usually announce their minimum allowable clearance…

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Posted onApril 4, 2013May 17, 2025Circuit Design

Tips for gerber export in Altium Designer

by Xueming1 Comment on Tips for gerber export in Altium Designer

I sent out a new circuit board design to a PCB fab house last week, but was put on hold multiple times for the reason of “insufficient copper to copper…

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Posted onFebruary 27, 2013June 13, 2020Electrical Engineering

Decode IR signal of Panasonic HD camcorder HC-X900M remote controller

by Xueming12 Comments on Decode IR signal of Panasonic HD camcorder HC-X900M remote controller

If you want to customize your own remote controller for Panasonic HD video camera HC-X900M, or build it into your own system to control multiple camcorders just like my old…

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Posted onJanuary 1, 2013June 13, 2020Electrical Engineering

Synchronize multiple Canon Rebel T4i video shooting with reverse-engineered RC-6 protocol

by Xueming8 Comments on Synchronize multiple Canon Rebel T4i video shooting with reverse-engineered RC-6 protocol

Let’s first take a look at the video clip of how my customized remote synchronize two (or more) Canon Rebel T4i video shooting. Canon Rebel series latest model T4i (as well as…

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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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