Ultra-Portable Fridge

Today I am going to show how we can make and ultra-portable Fridge. This is ultra-chip  too. The basic concept behind this is Thermoelectric Effect.  A thermoelectric device creates voltage when there is a different temperature on each side. Conversely, when a voltage is applied to it, it creates a […]

Ultrasonic Radar

In this tutorial I am going to demonstrate how to make Radar using ultrasonic sound. This project is purely for fun but it can be as a handy tutorial for learning the basics of the following topics. Distance measuring using Arduino and Ultrasonic Sound (HC-SR04) Wireless transmission using 433MHz RF and Arduino […]

Easy DTMF Keypad for Arduino and Microcontroller Projects (Wireless and Wired)

While making Arduino, 8051 microcontroller or any other digital electronics project we often need human interaction and we use keyboard or keypad. Making custom keypad for individual prototype project is time consuming and painful process. It also takes large number of microcontroller pin for interfacing. In this tutorial I am […]

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