The device described gives an audible warning to both front seat occupants to remind them to fasten their seat belts before driving off. The system works when the ignition is on. The alarm on the driver's side is only inhibited when the seat belt is fastened or if a front door is opened. The alarm on the passenger's side which is also inhibited when the seat belt is fastened or a door opened can also be turned off by an inhibit switch. This allows the alarm to be disabled when there is no passenger in the front seat. However, the alarm will be retriggered if the passenger door is opened and then closed. Proximity switches, logic ICs and a 555 IC timer are employed.
Seat belt reminder
Ueberwachung des Anlegens der Sicherheitsgurte
Practical Electronics ; 18 , 9 ; 22-24
1982
3 Seiten
Article (Journal)
English