Amplifier timer / Mohd Hanafi Zaidin and Azrel Assuad Arbai

• Main Authors: Zaidin, Mohd Hanafi, Arbai, Azrel Assuad
• Format: Student Project
• Language: English
• Published: 2003
• Subjects: TK Electrical engineering. Electronics. Nuclear engineering; Electronics; Apparatus and materials; Semiconductors; Detectors. Sensors. Sensor networks; Applications of electronics; Information display systems; Photoelectronic devices (General)
• Online Access: https://ir.uitm.edu.my/id/eprint/50594/1/50594.PDF; https://ir.uitm.edu.my/id/eprint/50594/

This circuit turn-off an amplifier or any other device when a low level audio fed to its input is absent for 15 minutes at least. Pushing PI the device is the switched-on feeding any appliance connected to SKI. Input audio signal is boosted and squared by IC2 A & B and monitored by LED D4. when...