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Category: Electronics

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 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 onJune 17, 2015June 10, 2020Electronics

Soldering a high-density LED array using DIY reflow oven

by Xueming1 Comment on Soldering a high-density LED array using DIY reflow oven

First of all, please watch the video below to find out how everything was done on my work bench. A recent project requires soldering 600+ tiny LEDs on long narrow…

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Posted onSeptember 10, 2014June 11, 2020Electronics

How to rework high density package ICs with DIY reflow oven

by XuemingLeave a comment on How to rework high density package ICs with DIY reflow oven

I am working on a DIY PCB project that requires mounting three PICOR PI3301 Power regulators. Unfortunately, the PI3301 comes with a high density 123-pin LGA footprint in a 10mm…

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Posted onDecember 25, 2013June 11, 2020Electronics

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 onJune 30, 2013Electronics

Reflow oven soldering without stencils

by Xueming4 Comments on Reflow oven soldering without stencils

First of all, let’s take a look at the video clip below (link) to find out how it is possible to reflow solder components without stencils. [youtube=”http://youtu.be/AXBflP_4fdQ”] I talked about DIY…

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Posted onApril 16, 2013June 10, 2020Electronics

Convert a toaster oven into a PCB reflow oven (video)

by Xueming15 Comments on Convert a toaster oven into a PCB reflow oven (video)

My reflow oven in action! Although I can skillfully solder as small as 0.5mm pitch QFN package chip by hand (post, video), more and more space saving components appearing on the…

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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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