How a triode works, how to read plate curves, and how to choose the operating point, with numerical examples based on the 6BX7-GT.
GX-TXT-v3 HOLD-node dynamics: burst charging, exponential discharge, LED on-time and sensitivity characterization with GNU Octave.
GX-TXT-v3 is a compact IR remote control tester with adjustable gain and sensitivity, 20-second auto-off, PCB layout, and assembly details.
Self-built injection transformer for Bode and loop-gain measurements, with calibration bench, GNU Octave processing, and LTspice comparison.
An LED is a p-n junction diode that emits light through the recombination of electrons and holes. The color depends on the band gap of the semiconductor material. Current must be controlled, not voltage, to avoid damage…