Automobile oil level detection and alarm circuit

Shown is a car oil level detection and alarm circuit . In this circuit, the fuel quantity in the fuel tank is detected by using the fuel stamp to drive the potentiometer
RP (float type potentiometer). When the amount of oil decreases, the potentiometer changes accordingly, and the @ pin of the comparator CA3130 outputs a low level . This signal turns on
VTI and VT2, and the light-emitting diode lights up and alarms. At the same time, the IC2~ pin receives the trigger signal from high level to low level, and the IC2③ pin
drives the buzzer to sound the alarm.