Surges and Spikes

Air conditioners, Refrigerators, and Elevators are high-powered equipment. This equipment has motors and compressors and they require a lot of energy to switch on and off. The sudden switching causes surges and spikes on the power line & if not properly handled then these can damage the device or machine. Power-line surges can easily...

SPI (Serial Peripheral Interface ) communication between 2 AVR mcus

SPI stands for Serial Peripheral InterfaceSPI  is a communication protocol used to communicate between microcontrollers and other devices, like other microcontrollers, external EEPROMs, DACs, ADCs, etc. With this interface, you have one Master device which initiates and controls the communication, and one or more slaves who receive and transmit...

4x4 matrix keypad interfacing with atmega8

This project shows how 16 keys are multiplexed by 4x4 matrix way i.e no of rows: 4 & no of columns: 4 & interfaced with an AVR mcu.  Atmega8 is used here along with a character LCD to show the pressed key value of the matrix keypad. Scienceprog.com 's LCD library is used  ckt & codes are here : https://dr...

Dot Matrix Display interfacing with Microcontroller

" Sync electronics" - message is displayed at Dot matrix by scrolling using 74HC595 shift register .... the circuit given is just for showing how 2 dot matrix units should be connected to a microcontroller through the shift register. If more dot matrix displays are needed then more shift registers are needed.  Note: Circuit will not simulate;...

74HC595 shift Register interfacing with atmega8

This is a simple project for interfacing the 74HC595 shift register with the Atmega8 microcontroller. An 8bit pattern is displayed by writing 8bit unsigned int type data to 74HC595 ic  this project will help understand multiple DOT matrix displays interfacing with the microcontroller. ckt & codes are here: https://drive.goo...

DC voltmeter using character LCD

This is a DC voltmeter  Atmega8 MCU is used  voltage is shown on the character LCD  Scienceprog.com 's LCD library is used  Ckt & codes are here : https://drive.google.com/file/d/0B8PCKc-8AIcDQVZKcTlrT3V5SDg/edit?usp=shari...

Coupling vs Decoupling

The capacitor is a basic electronic component capable of storing electric charges. It is made of an insulator attached by 2 metal plates on both sides. Today we will know about 2 important use cases of capacitors. But first a reminder, do not get confused by bringing on the concept of AC capacitor (non-polar) here. Just think that we are talking about...
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