Optocoupler, LED, Nixie Tube, and Photoelectric Devices: A Complete Guide
Optocouplers, LEDs, nixie tubes, and photoelectric devices are essential components in modern electronics. From signal isolation to light emission and display technology, these parts serve critical roles in consumer electronics, industrial equipment, and communication systems. Understanding their features and applications helps engineers and hobbyists choose the right component for each project. What Are Optocouplers? An optocoupler (also called an opto-isolator) is a semiconductor device that transfers electrical signals using light. It isolates the input circuit from the output, protecting sensitive systems from high voltage spikes or electrical noise. Popular examples include: FODM124 from onsemi – miniature flat encapsulation with a phototransistor output. HCNW137-500E from Broadcom – high-speed, TTL-compatible with 3750V isolation voltage. TLP292 from Toshiba – compact design for low-power applications. LED Technology: Efficient Light Sources Light-Emitting Diod...