Electrical system with functions of prompt and protection

The utility model discloses an electrical system with functions of prompt and protection, and the system consists of a front-end processing circuit, an amplification circuit connected with the output end of the front-end processing circuit, a drive circuit connected with the output end of the amplification circuit, and a fine tuning circuit connected with the drive circuit. The system is characterized in that the output end of the drive circuit is also connected with a warning circuit; and the warning circuit consists of a sampling circuit and a detection circuit. The system is provided with the warning circuit, and can automatically detect the voltage of the system and make corresponding warning through the warning circuit. A person can judge whether the voltage of the system is normal or nor according to the warning, and carries out corresponding processing, so as to guarantee that an electric load works in a range of normal voltage.