This US-100 ultrasonic module can realize 2 ~ 450cm of non-contact ranging function, has 2.4 ~ 5.5 V of wide voltage input range, static power consumption is less than 2mA. Their own temperature sensor will revise the ranging and has many communication modes like GPIO, serial ports etc, just like watchdog inside, very stable and reliable.
(1) the IO trigger ranging, to at least 10 us high level signal;
(2) automatically send eight 40 KHZ of square wave, automatic testing if it has any signals return;
(3) a signal to return to, through the IO output top level, the duration of the high level is from the launch ultrasonic returned to time. Test distance = (high level time * sound velocity (340 M/S)) / 2.
| Working Voltage | 2.4V-5.5V |
| Static current | Less than 2mA |
| Sensor angle | Less than 15 degrees |
| Detection distance | 2cm-450cm |
| Detecting precision | 0.3cm+1% |
| Weight | 10g |
| Wiring Way | VCC, trig (control terminals), echo (receiver), GND |
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Infrared Sensor PIR Motion Sensor – OKY3270 
