Multi-road-condition stepless regulation electronic electric horn circuit with early warning function

The utility model relates to a multi-road-condition stepless regulation electronic electric horn circuit with an early warning function. The device comprises a horn circuit and a rainfall and fog detection control circuit, the horn circuit comprises a direct-current power supply, a horn button switch, a triode, a diode, a third coil, a fourth coil, a fifth coil, an upper armature and a lower armature, the upper armature and the lower armature are oppositely arranged, and loudspeaking whistling is achieved through alternate connection and disconnection of the diode, the triode, the upper armature and the lower armature; the rainfall detection control circuit and the fog detection control circuit are connected with the third coil and the fourth coil respectively to control the number of turns of the third coil and the fourth coil serial-in circuit, and the rainfall detection control circuit and the fog detection control circuit are connected with the voltage stabilizing tube and the early warning lamp in series