ICSP connector (Used to bypass USB port and interfacing our board directly as serial device.

For instance our board gets hang in the middle of our running program then we can make use of this pin and this pin will clear everything up and starts program from beginning

Reset Pin: Used to reset our whole board and takes it to the initial stage of the running program.

External adaptor to deliver power to this board by external power supply up to 12 volts (board will make use of its voltage regulator and will make this voltage up to 5 V or 3.3 V as per our requirements).

TX and RX pins (for serial communication).

Bluetooth based dc motor speed and direction control using Arduino Uno.

To explore further, check this example tutorial: For example, analogWrite(5, 127) function generates a PWM on pin number 5 with a duty cycle of 50%. The duty cycle can vary between 0-100% or 0-255. The analogWrite(pin_number, duty_cycle) function provides PWM output with a specified duty cycle. PWM controls LEDs, motors and other actuators. It is just like an analog output function. Pin number, 5, 6, 9, 10, and 11 provide PWM output. But, only six of them have a pulse width modulation feature.

ac voltage measurement using Arduino: ac voltage detectorĭevelopment Board has 14 GPIO pin.

Analog voltage reading using Arduino UNO R3.

How to use AnalogRead in Arduino with example.

If you want to explore further about these pins, you can check these tutorials and projects: We save the output value in an integer type variable. To use analog channels, we use this function int analogoutput = analogRead(int pin_number) ĪnalogRead() function reads the analog voltage from a pin number specified as an argument to this function. These pins take an analog signal and by using ADC convertor they convert this analog signal to digital number between 0 – 1023. However, we can use step down voltage circuits to measure higher voltage.ĪDC (analog to digital converter) is used to sample these pins.

But the maximum voltage we can read directly with these analog channels is 5 volts. But they can be configured to lower range by using the AREF pin or analogReference () function available in Arduino IDE. These pins can read analog voltage from 0 V to 5 V. They provide the flexibility of connecting any external analog device with these pins.

Starting from A0 to A5 and they come up with a resolution of 10 bits.

Arduino datasheet uno