Blinkers!
Blinker modules to extend and visualize short pulses — useful for debugging embedded systems.
Georgi
Typical vs. Min/Max Specs
Understand the definition and use of typical and min/max specification in electronic component data sheets.
Accessing Unaligned Data in C
Handy trick for accessing unaligned data in C using a packed data structure to avoid manually loading or storing data byte by byte.
LDO Resistor Divider Chart
Interactive chart showing the resistor divider options for setting the output voltage of adjustable LDOs.
Standard R/C Values
Handy table including the standard E24 and E96 series of resistor/capacitor values. Also available as Python arrays.
Cheap Oscilloscope?
Is there such a thing like an affordable digital oscilloscope? It depends, but this little scope fits many entry-level requirements.
Pinyin with Tone Marks in Mac OS
Typing Mandarin Chinese Pinyin with tone marks in macOS is considerably easier using a custom keyboard layout.
YongBaiTech.com
It took some time, but I finally have my own little company in Shanghai — and in the last week I set up a new web site for it. I hope this helps attract customers but in the process I also learned a lot about modern web design.