These are some interesting internet of things projects and tutorials for beginners. These projects are based on Raspberry Pi, Arduino, ESP8266 etc.

ADC is the Analog to Digital converter, which converts analog data into digital format; usually it is used to convert analog voltage into digital format. Analog signal has infinite no of values like a sine wave or our speech, ADC converts them into particular levels or states, which can be measured in numbers as a physical quantity.

In this project we are going to build a cell phone controlled robot using 8051 microcontroller. Cell phone controlled robot runs over mobile DTMF technology. DTMF stands for Dual Tone Multiple Frequency. There are some frequencies that we use to create DTMF tones. In simple words by adding or mixing two or more frequencies we generate DTMF tone.

In this project we are going to design a simple Alarm clock using ATMEGA32 timers. ATmega32A microcontroller has a 16 bit timer, and we will be using that timer to count the seconds and develop a digital clock.

The 8255 is a programmable, parallel I/O device simply called PPI.
It can be programmed to transfer data in various modes of I/O.
It provides 24 I/O pins that can be grouped into three 8 bit parallel ports: PORT A, PORT B and PORT C.