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.
Microcontroller Operated Backup Alarm Device
2018-05-31
Patent
Electronic Resource
English
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 |
PERFORMANCE, TEST, AND APPLICATION CRITERIA FOR ELECTRICALLY OPERATED BACKUP ALARM DEVICES
SAE Technical Papers | 1974
CRITERIA FOR BACKUP ALARM DEVICES
SAE Technical Papers | 1971
CRITERIA FOR BACKUP ALARM DEVICES
SAE Technical Papers | 1967
ALARM—BACKUP—ELECTRIC LABORATORY PERFORMANCE TESTING
SAE Technical Papers | 1993