The MB1040 from the LV‑MaxSonar line of sensors is a very small, less than one cubic inch, ultrasonic sensor component module. This sensor comes with mounting holes provided on the circuit board for easy installation in nearly all applications.
Ultrasonic sensor measures the distance of the object at 42KHz.
Working mode outputs: analog voltage, RS232 serial, pulse width.
Resolution: 1 Inch.
Working speed: 20 Hz.
Maximum range: 254 Inches.
Supply voltage: 3v - 5.5 v.
Average current requirement: 2 mA.
Working principle: Vacuum sensor.
Weight: 8 gm.
BW: Leave open or hold low for serial output on the TX output. When BW pin is held high the TX output sends a pulse (instead of serial data), suitable for low noise chaining.
PW: This pin outputs a pulse width representation of range. The distance can be calculated using the scale factor of 147uS per inch.
AN: Outputs analog voltage with a scaling factor of (Vcc/512) per inch. A supply of 5V yields ~9.8mV/in. and 3.3V yields ~6.4mV/in. The output is buffered and corresponds to the most recent range data.
RX: This pin is internally pulled high. The LV-MaxSonar-EZ will continually measure range and output if RX data is left unconnected or held high. If held low the sensor will stop ranging. Bring high for 20uS or more to command a range reading.
TX: When the BW is open or held low, the TX output delivers asynchronous serial with an RS232 format, except voltages are 0-Vcc. The output is an ASCII capital “R”, followed by three ASCII character digits representing the range in inches up to a maximum of 255, followed by a carriage return (ASCII 13). The baud rate is 9600, 8 bits, no parity, with one stop bit. Although the voltage of 0-Vcc is outside the RS232 standard, most RS232 devices have sufficient margin to read 0-Vcc serial data. If standard voltage level RS232 is desired, invert, and connect an RS232 converter such as a MAX232. When BW pin is held high the TX output sends a single pulse, suitable for low noise chaining(no serial data).
Vcc: Operates on 2.5V - 5.5V. Recommended current capability of 3mA for 5V, and 2mA for 3V.
GND: Return for the DC power supply. GND (& Vcc) must be ripple and noise free for best operation.
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