Arduino projects, circuit design, PCB development, and electronic prototyping tutorials
A digital lab supply with a $300 price tag failed to hold a stable rail when the load stepped. The odyssey toward building my own started here.
RS-485 without proper termination produces reflections visible on a scope. Without bias resistors, the bus floats when all drivers are in high-impedance. A practical design guide.
Three near-misses over ten years of home lab work. What I changed in my setup and what I wish I had done earlier.
AC-coupled voltage on a DC rail, resistance of a live node, diode test on a FET — a collection of multimeter readings that actively mislead.
A power budget spreadsheet built before the schematic catches regulator sizing problems that cost board respins to fix. The template I use and the fudge factors that proved accurate.