The Arduino Uno is a microcontroller board based on the ATmega328 (datasheet). It has 14 digital input/output pins (of which 6 can be used as PWM outputs), 6 analog inputs, a 16 MHz ceramic resonator,

Distance measurement using ultrasonic

Corrections in distance measurement, distance measurement, microcontroller, sewer blockage detection, sewer inspection system, robotics, and ultrasonic sensor.
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Scientific Calculator

The simple calculator is made to perform simple arithmetic operation such as addition, subtraction, multiplication, and division.
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