The invention consist of a microcontroller operated electronic Backup Alarm Device for use in vehicles, especially in trucks, buses, heavy vehicles, earthmovers, mini trucks, and material handling moveable vehicles. The inventive feature is the use of a electronically powered programmed microcontroller and a speaker driver circuit, current sensing circuit and an amplifier, on a Printed Circuit Board (PCB) Assembly suitably connected to a speaker, where the speaker has a dual function of acting both as a mike and as a speaker.


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    Title :

    Microcontroller Operated Backup Alarm Device


    Contributors:

    Publication date :

    2018-05-31


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / H03G CONTROL OF AMPLIFICATION , Verstärkungsregelung / G08B SIGNALLING OR CALLING SYSTEMS , Signalisier- oder Rufsysteme / H02H EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS , Schutzschaltungsanordnungen / H04R LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS , Lautsprecher, Mikrofone, Schallplatten-Tonabnehmer oder ähnliche akustische, elektromechanische Wandler




    Backup alarm

    ZHOU JINGJING | European Patent Office | 2015

    Free access

    CRITERIA FOR BACKUP ALARM DEVICES

    SAE Technical Papers | 1971


    CRITERIA FOR BACKUP ALARM DEVICES

    SAE Technical Papers | 1967