Transmitting Sound Pressure Level(dB)
-6 dB Directivity (deg)
Allowable Input Voltage(Vp-p)
Operating Temperature (℃)
Storage Temperature (℃)
Metals of case
Supersonic sensor diamensions:
Voice alarm refers to when the parking sensor detects the distance is less than the set safety value, the sound to remind the driver, voice circuit design shown in Figure 4.
M3720 is a single-flash alarm sound integrated circuit, the chip stores an alarm sound, can be directly driven buzzer sound or external amplifier triode to drive the speaker to play, but also can drive a LED flashing.
The function of each pin of the chip is: 5-pin VDD; 1-pin VSS are the power input and the negative terminal respectively, VDD is 3 ~ 3.5V; 8-pin X and 1-pin Y are the chip external oscillation resistor; Trigger the control terminal, low trigger; 3 feet BZ and 2 feet BB alarm sound output, respectively, can be directly connected to the piezoelectric ceramic buzzer, if the speaker is driven by the 3-pin BZ end leads; 4 feet L to flash Light output, LED light can be directly driven.