What data type is analogRead?
Although it is limited to the resolution of the analog to digital converter (0-1023 for 10 bits or 0-4095 for 12 bits). Data type: int .
What integer value is returned by the analogRead function?
analogRead() returns an integer value ranging from 0 to 4095 (12-bit).
What is the purpose of the analogRead () function?
The analogRead( ) function reads the value from the specified analog pin present on the particular Arduino board. The ADC (Analog to Digital Converter) on the Arduino board is a multichannel converter. It maps the input voltage and the operating voltage between the values 0 and 1023.
What is 10K ohm potentiometer?
It is a single turn 10k Potentiometer with a rotating knob. These potentiometers are also commonly called as a rotary potentiometer or just POT in short. These three-terminal devices can be used to vary the resistance between 0 to 10k ohms by simply rotating the knob.
What is the output of potentiometer?
Potentiometers work by varying the position of a sliding contact across a uniform resistance. In a potentiometer, the entire input voltage is applied across the whole length of the resistor, and the output voltage is the voltage drop between the fixed and sliding contact.
What is difference between analogRead and Digitalread?
Analogue reads are very slow, but tell you fairly precisely what the (relative) voltage is on a pin. Digital read tells you that the voltage is over or under some preset thresholds, (relative to the supply voltage) but is very fast. A light switch is on or off.
What is the difference between digitalWrite and digitalRead?
digitalWrite(): This function set pin states either HIGH or LOW. Here, 5V (or 3.3V on 3.3V boards) for HIGH, 0V (ground) for LOW. Now, again in your code. digitalRead(): This function use to read the value from a specified digital pin, either HIGH or LOW.
What does K mean in potentiometers?
The ‘k’ represents kiloohms. The numeric value tells the value of resistance. 1k means that the pot will provide resistance up to 1000 ohm. 10k & 100k means it will provide ten times and 100 times more resistance than 1k, respectively.
What is the range of a potentiometer?
Potentiometers with R = 10Ω have 0-10Ω range. It’s always from 0 to nominal R (+/- tolerance). Typical potentiometer (and other basic electronic parts) values are defined in IEC 60063. There are few number series – E6 and E12 are very common.
What does the analogRead A2 function do?
For example: int sensorvalue = analogRead(A2);. The function is used to program and address analog pins on the Arduino board and will also return the analog input reading which is between 0 to 1023.
What is the difference between digitalRead and analogRead in Arduino C language?
As stated in the arduino website, digitalRead reads the value from a specified digital pin, either HIGH or LOW. As for analogWrite it is written that an analog value (PWM wave) to a pin. Can be used to light a LED at varying brightnesses or drive a motor at various speeds.