Author - Ligo George

EasyEDA vs DipTrace vs OrCAD

EasyEDA vs DipTrace vs OrCad

Today I am gonna write about my PCB designing journy that happend before 8 year. I started doing hobby circuits before 8 years and now I am doing professional circuits. Phase 1 : Hand Drawn (no Softwares) I started desiging 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 itrations of drawing was required to make even a small circuit. After the design is completed, I [...]

Virtual Ground - Opamp

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 [...]

ESP8266 - WiFi SoC

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 belongs to Espressif System's Smart Connectivity Platform (ESCP) which is a set of high performance, high [...]

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 [...]

Rain Alarm using 555 Timer - PCB

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 [...]

LCD Glass Panel - Liquid Crystal Display

LCD Display – Fundamentals

LCD or Liquid Crystal Display is a flat electronic display which is very commonly used in digital watches, calculators, laptops, televisions etc. It make use of light modulating properties of  liquid crystal and polarization of light for its operation. Low power consumption, less thickness and less weight of LCD enables its use in battery powered and portable applications. Prerequisites Light is an electromagnetic radiation which stimulates sight and make things visible. It is produced by vibration of electric charges, having both electric [...]

EasyEDA

EasyEDA – A Cloud based PCB Design Software

Cloud computing is an internet based computing which relies on sharing computer resources. It enables us to use computer resources or processing power as a utility similar to using electricity. So we don't need to make big computer infrastructure in our building, just use the cloud resources whenever there is a need. Nowadays everything become cloud computing, like cloud storage, word processing, business analytics etc. What is the role of cloud computing in electronics ? The question ends here, EasyEDA. [...]

I²C Bus Logo

I²C Communication with PIC Microcontroller – MPLAB XC8

I2C or IIC or I2C stands for Inter-Integrated Circuit. It is a very popular multi-master, multi-slave serial communication interface developed by Philips. I2C uses two bidirectional open drain data lines, Serial Data (SDA) and Serial Clock (SCL) with pull up resistors as shown below. Unlike UART, you can connect and communicate to multiple devices using the same I2C bus. I2C is a master slave protocol. It means that devices connected to I2C bus will be either master or slave. The master is the [...]