**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\\