Getting Started with Python
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 program their idea in fewer lines of code than other programming languages like C does. It is used all round the globe for web designing, system programming, user interfaces, product customization, numeric programming etc.Why Python?
Python language is...
Interfacing Keypad with 8051 Microcontroller using Keil C
Matrix Keypad
Matrix Keypads are commonly used in calculators, telephones etc where a number of input switches are required. We know that matrix keypad is made by arranging push button switches in row and columns. In the straight forward way to connect a 4x4 keypad (16 switches) to a microcontroller we need 16 inputs pins. But by connecting switches in the following way we can read the status of each switch using 8 pins of the microcontroller. 4x4-Matrix-Keypad The status of each...
Interfacing Servo Motor with 8051 using Keil C
A servo motor uses servo mechanism, which is a closed loop mechanism that uses position feedback to control the precise angular position of the shaft. Stepper Motors, which is an open loop system can also be used for precise angular control. But Servo Motors are preferred in angular motion applications such as robotic arm. Moreover controlling of servo motors are very simple, easy and needs no extra hardware like stepper motor. Usually hobby circuit servo motors have three wires. Two of them...
Interfacing Stepper Motor with 8051 using Keil C – AT89C51
Stepper Motor A Stepper Motor is a brushless, synchronous DC Motor. It has many applications in the field of robotics and mechatronics. The total rotation of the motor is divided into steps. The angle of a single step is known as the stepper angle of the motor. There are two types of stepper motors Unipolar and Bipolar. Due to the ease of operation unipolar stepper motor is commonly used by electronics hobbyists. For more details please read the article Stepper Motor or Step Motor....
Interfacing DC Motor with 8051 using L293D – AT89C51
In some of the electronics projects you may want to control a DC Motor with 8051 microcontroller. The maximum current that can be sourced or sunk from a 8051 microcontroller is 15 mA at 5v. But a DC Motor need currents very much more than that and it need voltages 6v, 12v, 24v etc, depending upon the type of motor used. Another problem is that the back emf produced by the motor may affect the proper functioning of the microcontroller. Due to these reasons we...
Interfacing Relay with 8051 using Keil C – AT89C51
In some electronic applications we need to switch or control high voltages or high currents. In these cases we may use electromagnetic or solid state relays. For example, it can be used to control home appliances using low power electronic circuits. relay An electromagnetic relay is a switch which is used to switch High Voltage or Current using Low power circuits. It magnetically isolates low power circuits from high power circuits. It is activated by energizing a electromagnet, coil wounded on a soft iron core. For...
LED Blinking using 8051 Microcontroller and Keil C – AT89C51
8051 Microcontroller is a programmable device which is used for controlling purpose. Basically 8051 controller is Mask programmable means it will programmed at the time of manufacturing and will not programmed again, there is a derivative of 8051 microcontroller, 89c51 micro controller which is re-programmable. AT89C51 89c51 is 8-bit device means it is capable of doing 8-bit operations. It have 4 ports which are used as input or output according to your need. This device also have Timer, Serial Port interface and Interrupt controlling you can use these according to your need. The datasheet may be downloaded...