The circuit was designed to produce a low cost 'car reversing alarm, which is already compulsory in some European countries. A 555 timer is used to drive a piezoelectric buzzer whenever the reversing lights are operated during the daytime.
Audible reversing alarm
Hoerbarer Alarm bei Einschaltung des Rueckfahrlichts
Practical Electronics ; 20 , 6 ; 34
1984
1 Seite
Aufsatz (Zeitschrift)
Englisch
Reversing alarms - We test Brigade's latest white noise reversing alarm.
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