MOC7811 Opto Isolator Module MOC-7811 motorola

Product Overview

The module featured in your document represents a series of Slotted Couplers and Interrupter Modules. It operates on the principle of optical beam interruption, utilizing an infrared emitting diode that faces an internal photodetector across a molded plastic housing gap. The board features a specialized slot built between the transmitter and receiver components, which registers physical objects whenever they pass through the gap to block the light path and trigger a binary digital switching state change. It is highly popular in DIY robotics, automated machinery, and industrial hardware for tracking motor speed through encoder disks, sensing physical boundaries, and establishing precise position indexing benchmarks.