Car warning lights circuit


Posted on Nov 7, 2012

The SN75604, with input control logic but requiring only one supply rail, can be used in the `lights on` sensor and alarm driver. The device Vqq and enable inputs are connected to a voltage lead from the light switch. The direction control input is connected to a lead from the ignition switch. Only operation of the lights without the ignition will result in the alarm sounding.


Car warning lights circuit
Click here to download the full size of the above Circuit.

The beeper used in this application is an Archer 273-066 that will operate from 3 V to 28 V. At a typical 12 V level, it will produce a pulsating tone of about 95 dB at 30 cm. The alarm "on" current is about 12 mA when operating from a 12 V supply.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Receiver for 50 khz optical transmitter
Flip-Flop Debouncer Switch
Switching intensity of LEDs
IR3721 Power Monitor IC With Analog Output
Light control circuit diagram
Unsteady chain circuit diagram
Payload power current limit circuit diagram
A variable frequency oscillating circuit transistor



Top