As I encounter more EMC (Electromagnetic Compliance) tests, I find it useful to build hardware to perform those tests myself, before going to the laboratory: Precompliance Tools
My good old high resolution CRT monitor was failing; I fixed it.
With a response time as low as 5μs, this electronic fuse can provide current limiting and fault protection for electronic circuits, especially in development, research or laboratory environments, where the circuitry being tested may not yet have protection circuitry incorporated.
A project I'd always been meaning to do: build a complete hetrodyne radio set. This is built in the classic style, with vacuum tubes. Excellent performance: low noise and high gain; wide dynamic range; no spurious responses within the tuning range; AM and SSB demodulation.
A compact, high frequency induction heater, suitable for diverse applications from soldering to powder metallurgy. This project is in the proposal stage. Please contact me if you have any questions, comments or would like to support this project!
A small 10W nominal power output, 70% typical efficiency, switching amplifier.
A fully functional, high quality theremin. Completely hand made, from-scratch design, it has high sensitivity and low distortion.
Small converters, for regulating converting voltages and generating isolated supplies. Typical 5-18V input, outputs available for 5V, 12V, +12/-6V, multiple outputs, etc. Applications include automotive equipment, gate drive supplies, etc. Typical size 2 × 3 inches, unpackaged circuit board.
Adjustable output, up to 5V, 100A. High efficiency switching power supply, suitable for operating one electrolytic cell. LCD interface allows quick access to preprogrammed settings, including time and charge monitoring. Uses include electroplating, chemical manufacture, etc.
Intended for electric vehicles, this controller is rich with features and can drive an output stage rated for DC motors up to 100 HP. Other applications include treadmills, machine tool spindle power, etc.