- Analog electronics, op-amps, filters, analog channels, trans-impedance amplifiers, pressure sensors, temperature sensors, power regulators (linear and switching), high voltage DC to DC converters.- Digital electronics, microcontroller interfacing, CPLD and FPGA interfacing.- Schematic entry in OrCAD.- Circuit board layout in Mentor Graphics Pads.- Cable drawings in AutoCAD. I have 20+ years experience in the petrochemical and medical fields, primarily in measurement equipment for scientific analysis of samples. I've worn many hats throughout my career. Assembly, field service, engineering, manufacturing, root cause analysis, safety, and electromagnetic compliance.What I like best is to design and create circuits and circuit boards and to make them work. I have about a 60/40 mix of analog to digital.