From wired controls to visible light, ultrasonics and infrared: a short journey through the technological evolution of the television remote control.
How an IR remote control works, explained from real oscilloscope measurements: carrier, MARK, SPACE, header, bit timing and NEC identification.
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.
High-resolution audio goes beyond the CD standard, offering sample rates of up to 192 kHz and 24-bit depth. While some listeners praise its greater naturalness and detail, others question the practical value of frequencies above 20 kHz. Scientific studies and psychoacoustic tests have produced conflicting results, fueling an ongoing debate over perceived quality, the limits of human hearing, and possible technical distortions.