ARDUINO AJ-SR04M Distance Measuring Transducer Sensor User Manual
Operating Mode:
After connecting the ultrasonic ranging module with 3-5.5V power supply, the module has five working modes:
Mode 1: Common Pulse Width Square Wave (Minimum Power Consumption 2.5mA)
Mode 2: Low Power Pulse Width Square Wave (Minimum Power Consumption 40uA)
Mode 3: Automatic Serial Port (Minimum Power Consumption 2.5mA)
Mode 4: Serial Port Trigger (Minimum Power Consumption 20uA)
Mode 5: ASCII Code output (Minimum Power Consumption 20uA)
Module Output Format Description:
* The method of switching mode. In case of power failure, the mode can be changed by changing the resistance value of R19 above the module.
* Patterns Selection Method:
- Compatible market HR-04 trigger mode
- Low Power Mode
- Automatic Serial Port Mode
- Low Power Serial Port Mode
- Computer Printing Mode
| Pattern | Mode Corresponds | Stand by Current | Low Power Current | Blind Area | The Furthest Distance |
| Compatible market HR-04trigger mode | Open circuit | <2mA | 20cm | 8m | |
| Low Power mode | 3001C0 | <2mA | <40pA | 20cm | 8m |
| Automatic Serial Port Mode | 120K12 | <2mA | 20cm | 8m | |
| Low Power Serial Port Mode | 47K12 | <2mA | <20pA | 20cm | 8m |
| Computer Printing Mode | oK | <2mA | <20pA | 20cm | 8m |
Module Startup Flow Chart:
Mode 1: Standby current < 2.0mA, working current 30mA
Mode 2: Low power consumption<40uA,working current 30mA
Mode 3:Serial port automatic mode, average current 5mA
Mode 4: Serial low power mode, low power<20uA,standby 2mA
Mode 5: Serial low power mode, standby < 20uA, working 30mA
Size Chart:
Size of Strip Line
Ultrasound Transducer
Ultrasound Transducer
Strip control
motherboard size
motherboard size
Documents / Resources
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ARDUINO AJ-SR04M Distance Measuring Transducer Sensor [pdf] User Manual AJ-SR04M Distance Measuring Transducer Sensor, AJ-SR04M, Distance Measuring Transducer Sensor, Measuring Transducer Sensor, Transducer Sensor, Sensor |
