Imagine that you want to control 100 LED’s with a PIC Microcontroller. No PIC Microcontroller with a DIP package having that many IO lines. This article explains two ways to expand output pins of a Microcontroller through multiplexing. Here we are using Time Division Multiplexing to expand output pi...

In some of your electronic projects you may want to control a DC Motor with Atmega32 Microcontroller. We can’t connect a DC Motor directly to a microcontroller due to following reasons. ?A microcontroller can’t supply the current required for the working of DC Motor. ATmega32 Microcontroller can sou...

Raspberry Pi is an ultra low cost credit card sized computer developed by Raspberry Pi Foundation with an intention to teach computer programming to school students. You can setup a computer with your home TV under 60$. Please read the article Raspberry Pi for more details. You need the following it...

What is Python? Python is an open source general purpose programming language. It is designed in such a way to improve software quality, developer productivity, program portability and component integration. Python gives more importance to its code readability and its syntax allows programmers to p...

This is a circuit for controlling the street lights,garden lights,automatically. You don’t need to turn it on and turn it off again and again, just turn on the circuit once and forget, it will automatically manage itself by sensing the available brightness in the garden or street. Circuit Diagram 1....

Here is a simple and cheap Laser Based Security System, which costs below Rs. 100. It is a simple circuit using LM358 OP-AMP and LM555 Timer. This circuit is triggered when the Laser beam falls on the LDR interrupts, which sounds the buzzer connected to it. This can be used to protect your valuable ...

Plotting of Discrete and Continuous signal The 2 main functions for plotting are - plot() function - For plotting Continuous signal - stem() function – For plotting Discrete signal stem() - 2-D plot function for plotting discrete sequence of data SYNTAX : 1.stem(y) – Plots the data sequence y speci...

Plotting Using fplot() fplot() : It is used to plot between the specified limits. The function must be of the form y=f(x), where x is a vector whose specifies the limits, and y is a vector with the same size as x. SYNTAX : 1.fplot(fun, limits) – A function fun is plotted in between the limits speci...

One on the major part of our electronics products is the DC Power Supply that converts mains AC voltage to a lower DC voltage. Usually we use a step down transformer to reduce mains AC voltage to desired low voltage AC and then convert it to DC or we use Switched Mode Power Supplies. But in both cas...

Inverter is a electrical device that converts DC Power to AC. We usually use the word Inverter for the device used in our households for mains power back up. It stores electrical energy in a battery and discharges it when need. Our household inverters mainly have two parts, Battery Charging Circuit ...