Simple Lie Detector Circuit
The concept behind this Lie Detector Circuit is that, we assume when a person lie he kind of pumps up his anxiety level which makes him sweat and develop moisture on his skin. We then use this piece of circuit to detect if there is moisture on his skin and based on the result we glow and LED, a green one for truth and red for lie. Of course yes this cannot be claimed as a lie detector, but you can use this to play with your friends and have fun. More than that you get to learn stuff.
To make your printer accessible from multiple devices or computers, either you need a Wi-Fi printer or need a costly setup to build a Network Printer. So in this season of festivities, what would be a perfect gift than a Network Printer (did I just give someone an Idea?) but instead of spending hundreds of dollars for this new acquisition, what if you could do the same by adding a $35 Raspberry Pi 3 to that old printer laying around on your desk? Yes I thought it’d be awesome too!
In this tutorial, we will attach a AC appliance with Relay and make a temperature controlled home automation system using Arduino. It also shows the temperature and appliance status on the 16*2 LCD display connected with the circuit.
In this project, we will learn how to build a simple robot using Arduino that could move towards the fire and pump out water around it to put down the fire. It is a very simple robot that would teach us the underlying concept of robotics; you would be able to build more sophisticated robots once you understand the following basics.
We have some instruments which could measure the sound signals in dB but these meters are slightly expensive and sadly we do not have an out of box sensor module to measure sound levels in decibels. And it is not economical to purchase expensive microphones for a small Arduino project which should measure the sound level in a small classroom or living room.
In this tutorial we will learn how to interface a Nokia 5110 Graphical LCD with Arduino and get it working.
There are two methods of making 2-way switching connection one is 2-wire control and another is 3-wire control. We have explained both the methods below and both the methods are demonstrated in the Video given at the end of this article.
In this project, let use the power of Raspberry Pi to build a Robot that could track ball and follow it just like the robots that plays football.