Grove - sensors and potentiometers

Sensors - potentiometers, digital

The sensors are used to control various operating parameters of such devices, such as plotters, welding machines, robots, table, sets, audio and others. The rotary encoder is a type of sensor that provides a feedback signal in which the change of position takes place not continuously, as is the case in conventional potencjometrach, but in leaps and bounds. The operating principle of the sensor based on the rotation of the shaft with a disk with teeth. This movement is converted into an electric signal in the form of pulses which are counted by a counter in the form of hardware or software, and on this basis are processed to obtain the desired output in the form of, for example, changing the position or speed of the controlled object.

Potentiometers - easy management of process parameters

Potentiometers are a terminal in which resistance can easily be manually adjusted continuously. With their help you can control, for example, the volume of the audio system, as well as in more complex applications that use signal processing analog voltage into digital form - the brightness of LED lighting-the rotation speed of the motor. To do this, connecting one rotary potentiometer for Arduino, its two extreme output needs to be connected respectively to the output of the power supply voltage of 3.3 V or 5.0 V and the mass of the power supply (GND), and the average output-to one of the inputs to analog Converter analog to digital. The voltage readings from the analog pin, the Arduino is done using the operator analogRead() with 10-bit resolution of the Arduino Uno.