The Transistor Tester extends the Analog Discovery with a ready-to-use curve tracer instrument for the characterization of diodes, NPN/PNP transistors as well as P- and N-FETs. It provides automatically switched reference resistors and can be connected directly via the 2×15 pin interface without the need for external circuits or resistors. WaveForms visualizes I-V characteristics graphically and provides motion meters and screenshots for precise analysis and lab reports.