Ligo George - electroSome

SPI Communication with PIC Microcontroller – MPLAB XC8

SPI (Serial Peripheral Interface) is a full duplex synchronous serial communication interface used for short distance communications. It is usually used for communication between different modules in a same device or PCB. SPI devices communicates each other using a master slave architecture with a single master. SPI Communication SPI is called as a 4-wire bus as it requires four wires for its communication as shown above. In the case of single slave communications we need only 3 wires, as slave select (SS) is...

May 1, 2017By Ligo GeorgeMPLAB XC8, PIC Microcontroller, Tutorials16F877A, MPLAB, PIC, SPI, XC82 CommentsRead more...

SPI – Serial Peripheral Interface

SPI (Serial Peripheral Interface) is a full duplex synchronous serial communication interface used for short distance communications. It is usually used for communication between different modules in a same device or PCB. SPI devices communicates each other using a master slave architecture with a single master. Multiple slaves are supported through individual slave select lines. SPI Interface SPI is called as a 4-wire bus as it requires four wires for its communication as shown below. In the case of single slave communications...

April 30, 2017By Ligo GeorgeElectronicsSerial Communication, SPI2 CommentsRead more...

What is a Microprocessor ?

What is a Microprocessor ? A microprocessor is an integrated circuit (IC) which incorporates core functions of a computer's central processing unit (CPU). It is a programmable multipurpose silicon chip, clock driven, register based, accepts binary data as input and provides output after processing it as per the instructions stored in the memory. Block Diagram of a Computer Block Diagram of a Computer Why we need a Microprocessor ? Thank you "B B DWIVEDI" for asking this question in the comment. So I thought of...

April 5, 2017By Ligo George8085, Electronics, TutorialsMicroprocessor, processor8 CommentsRead more...

EasyEDA vs DipTrace vs OrCad

Today I am gonna write about my PCB designing journey that happened before 8 year. I started doing hobby circuits before 8 years and now I am doing professional circuits. Phase 1 : Hand Drawn (no Software) I started designing PCB manually without using any softwares. Mostly I used graph papers to design PCB as it was very easy to make measurements and alignments. Several iterations of drawing was required to make even a small circuit. After the design is completed, I...

December 13, 2016By Ligo GeorgeElectronicsDipTrace, EasyEDA, Layout, OrCad, pcb, PCB Design6 CommentsRead more...

Virtual Ground – Opamp

What is Virtual Ground ? As the name indicates it is virtual, not real ground. For some purposes we can consider it as equivalent to ground. In opamps the term virtual ground means that the voltage at that particular node is almost equal to ground voltage (0V). It is not physically connected to ground. This concept is very useful in analysis of opamp circuits and it will make a lot of calculations very simple. Virtual Ground - Opamp Lets see how the virtual...

December 2, 2016By Ligo GeorgeBasic Electronics, Electronics, OpampGround, Opamp, Virtual Ground4 CommentsRead more...

ESP8266 – WiFi SoC

WiFi SoC (System on Chip) ESP8266 is the most popular and low cost WiFi SoC with TCP/IP stack and a low power 32 bit microcontroller manufactured by Espressif, a Shanghai based Chinese manufacturer. As you might already know, nowadays IoT (Internet of Things) is an emerging field. This is the one of the most popular and low cost solution for connecting 'Things' to internet via WiFi. ESP8266 - WiFi SoC ESP8266 belongs to Espressif System's Smart Connectivity Platform (ESCP) which is a set of high...

November 25, 2016By Ligo GeorgeElectronics, ESP8266, IC, TutorialsESP8266, IoT, SoC, TCP/IP, UDP, WiFi0 CommentsRead more...

LED Chaser using 4017 and 555 Timer - PCB

LED Chaser using 4017 Counter and 555 Timer

Introduction A simple LED chaser hobby circuit can be made using 555 timer and CD4017 counter IC. You can use this circuit for decorative purposes. By modifying the circuit in a proper way, you can even use this to control lights working on AC mains. Components Required CD4017 Counter IC - 1 555 Timer IC - 1 LED - 11 680Ω Resistor - 11 10KΩ Resistor - 1 10KΩ Variable Resistor - 1 10μF Capacitor - 1 0.01μF Capacitor - 1 9V Battery...

September 25, 2016By Ligo George555 Circuits, Electronics, Hobby Circuits, Projects555, Chaser, Counter, LED12 CommentsRead more...

Rain Alarm using 555 Timer

Here is a simple and interesting hobby circuit that can be made using the popular 555 timer IC. As you might already know, a 555 Timer can be easily wired as Astable, Monostable or Bistable multivibrator. This circuit can be used as rain sensor, water overflow sensor or as a water level sensor. This circuit make use the principle that normal water can conduct some amount of electricity (PURE water is not a good conductor of electricity but water seen in...

June 26, 2016By Ligo George555 Circuits, Electronics, Hobby Circuits, Projects555, Alarm, Rain, Sensor1 CommentRead more...

Author - Ligo George