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**Ultrasonic distance sensors**

__Ultrasonic sensor module US-100__ {{  us-100-ultrasonic-sensor-1.jpg::?200|}}

The ultrasonic sensor module us-100  is a convenient way for measuring distances from objects. This module has a lot of applications such as parking sensors, obstacle and terrain monitoring systems, industrial distance measurements, etc. It has a stable performance and high accuracy ranging from 2cm to 450cm. The module sends an ultrasonic signal, eight pulses of 40kHz square wave from the transmitter; the echo is then picked up by the receiver and outputs a waveform with a time period proportional to the distance. The connected microcontroller accepts the signal and performs necessary processing.\\

The US-100 can have a //dip-switch//. if it has, with the switch in place the US-100 will give a serial output.\\ Without it will give an analog output.\\

The US-100 has 2 groundpins. They need to be connected both.\\

Specifications:\\

Input voltage: 5V DC\\
Quiescent current: less than 2mA\\
Level output: 5V high\\
Level output: at the end of 0V\\
Induction angle: not more than 15 degrees\\
Detection distance: 2cm-450cm\\
Precision: up to 1mm\\
Dimensions: 4.4cm x 2.6cm x 1.4cm\\
Weight: 43g\\

some examples can be found here: [[http://arduinoinfo.mywikis.net/wiki/UltraSonicDistance|]]\\
{{::ultrasonic_sonar_module_1r0.pdf|manual from Gizmo}}\\
{{::us_100_ultrasonic_sensor_module.pdf|manual}}\\

\\

__Ultrasonic sensor module HC-SR04__ {{ ::ultrasonic-sensor_hc-sr04.jpg?200|}}

The HC-SR04 has no digital output and only one groundpin.\\

Specifications:\\

Power Supply :+5V DC\\
Quiescent Current : <2mA\\
Working Current: 15mA\\
Effectual Angle: <15°\\
Ranging Distance : 2cm – 400 cm/1″ – 13ft\\
Resolution : 0.3 cm\\
Measuring Angle: 30 degree\\
Trigger Input Pulse width: 10uS\\
Dimension: 45mm x 20mm x 15mm\\

{{ ::hc-sr04_diagram.png?300 |}}
{{::hc-sr04_ultrasonic_module_user_guidejohn.pdf|HC-SR04 User Guide}}\\
{{ ::hc-sr04_user_manual.pdf | HC-sr04 user manual}}\\
[[https://randomnerdtutorials.com/complete-guide-for-ultrasonic-sensor-hc-sr04/ | complete-guide-for-ultrasonic-sensor-hc-sr04]]

 __Ultrasonic sensor module JSN-SR04T__ {{ ::jsn-sr04t-1000x1000.jpg?300|}}

Ranging Distance: 20-450cm\\
Power Supply: 5V\\
Working Current: <8mA\\
Resolution: 1mm\\
Nauwkeurigheid: ± 10mm\\
Measuring Angle: <75 degree\\
Dimension: 42mm x 29mm x 12mm\\
Kabellengte: ~250cm\\

Can be used like the HC-SR04\\
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