Optoelectronics Circuits Manual is a guide book for optoelectronics device users. The book covers the basic principles, characteristics, and applications of popular types of optoelectronics. The coverage of the text includes LED display and graph circuits, seven-segment displays, and light-sensitive and optocoupler devices. The book also covers brightness-control techniques, infra-red light-beam alarms, and multichannel remote control systems. The text will be useful to researchers and professionals who employ optoelectronics in their work, such as practical design engineers.