Details

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BUY US1881 https://www.utsource.net/itm/p/12612464.html

Parameter	Description
Part Number	US1881
Function	Ultrasonic Sensor
Operating Voltage	5V DC
Operating Current	<20mA (when not transmitting)
Range	2cm to 400cm
Accuracy	卤1cm
Trigger Input	10渭s TTL pulse
Echo Output	TTL level pulse width proportional to distance
Output Impedance	1k惟
Operating Frequency	40kHz
Operating Temperature	-10掳C to +70掳C
Storage Temperature	-20掳C to +80掳C
Humidity	10% to 90% RH (non-condensing)
Dimensions	45mm x 20mm x 15mm
Weight	10g

Instructions for Use

1. Power Supply:

   • Connect the VCC pin to a 5V DC power supply.
   • Connect the GND pin to the ground of the power supply.

2. Trigger Pulse:

   • Send a 10渭s TTL pulse to the TRIG pin to start the ranging.
   • The sensor will automatically send out an ultrasonic burst and wait for the echo.

3. Echo Signal:

   • The ECHO pin will output a high-level pulse whose duration is proportional to the distance to the object.
   • Measure the duration of the high-level pulse using a microcontroller or timer.
   • Distance (in cm) can be calculated using the formula: [ text = frac{text{Pulse Duration (in 渭s)}}{58} ]

4. Maximum Ranging Interval:

   • To ensure accurate readings, the maximum ranging interval should be at least 60ms between two trigger pulses.

5. Mounting:

   • Mount the sensor in a stable position with the ultrasonic transducer facing the area to be measured.
   • Avoid placing the sensor near reflective surfaces that could cause false readings.

6. Interference:

   • Ensure that multiple sensors are not placed too close to each other to avoid interference.
   • If using multiple sensors, stagger the trigger pulses to prevent overlapping signals.

(For reference only)