Hi All,
I decided to post here some details I've collect from the Ultrasonic Sensor US-100, which is a great replacement for the popular HC-SR04.
The US-100 has some advantages, including the fact it can run on lower voltages, from 2.4V up to 5.5V. Also, the sensor counts with temperature compensation and can be used in a UART mode, where you can read the distance and/or the temperature.
Specs:
Operating voltage: DC 2.4V ~ 5.5V
Quiescent Current: 2mA
Working temperature: -20 ~ +70 degrees
Output: level or UART (jumper selectable)
Induction angle: less than 15 degrees
Detection distance: 2cm-450cm
Detection Accuracy: 0.3cm +1%
Next I've capture the power consumption when the sensor trigger goes high. It basically consumes very little current at 3.3V. Around 1.8mA when idle and no more than 2mA when performing a measurement.
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There are plenty of information on the Internet how to use it, including how to use it on Pulse and Serial modes.
To minimize even more the power consumption you can "power" it directly from a MCU pin, or, if you prefer use a GPIO to control a low-side N-Mosfet switch only when required. Just allow a few milliseconds for the sensor to start-up before triggering it.
I decided to post here some details I've collect from the Ultrasonic Sensor US-100, which is a great replacement for the popular HC-SR04.
The US-100 has some advantages, including the fact it can run on lower voltages, from 2.4V up to 5.5V. Also, the sensor counts with temperature compensation and can be used in a UART mode, where you can read the distance and/or the temperature.
Specs:
Operating voltage: DC 2.4V ~ 5.5V
Quiescent Current: 2mA
Working temperature: -20 ~ +70 degrees
Output: level or UART (jumper selectable)
Induction angle: less than 15 degrees
Detection distance: 2cm-450cm
Detection Accuracy: 0.3cm +1%
Next I've capture the power consumption when the sensor trigger goes high. It basically consumes very little current at 3.3V. Around 1.8mA when idle and no more than 2mA when performing a measurement.
There are plenty of information on the Internet how to use it, including how to use it on Pulse and Serial modes.
To minimize even more the power consumption you can "power" it directly from a MCU pin, or, if you prefer use a GPIO to control a low-side N-Mosfet switch only when required. Just allow a few milliseconds for the sensor to start-up before triggering it.