Tag Archives: code

Standard Resistor Values

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Resistors and Capacitors are types of passive electronic components. The basic unit of resistance is the ohm (Ω) and capacitance is Farad.

Standard base resistor values are given in the following tables for the most commonly used tolerances (1%, 2%, 5%, 10%), along with typically available resistance ranges.

In 1952 the IEC (International Electrotechnical Commission) decided to define the resistance and tolerance values into a norm, to ease the mass manufacturing of resistors. These are referred to as preferred values or E-series, and they are published in standard IEC 60063:1963. These standard values are also valid for other components like capacitors, inductors and Zener diodes. The preferred values for resistors were established in 1952, but the concept of the geometric series was already introduced by army engineer Renard in the 1870s. Continue reading Standard Resistor Values →

Resistor Color Code Calculator

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The electronic color code is used to indicate the values or ratings of electronic components, usually for resistors, but also for capacitors, inductors, diodes and others. A separate code, the 25-pair color code, is used to identify wires in some telecommunications cables.

Standard Resistor and Capacitor values with IEC and EIA code is explained in previous post.

This tool is used to decode information for color banded axial lead resistors. Select their colors to determine the value and tolerance of the resistor.

Continue reading Resistor Color Code Calculator →

ESP8266 Web Server with HTML Web Page

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In this tutorial we are making ESP8266 web server with HTML web page. ESP8266 connects to WiFi Network and we get web page in our phone and PC which is connected to same WiFi network.

In previous tutorial we have seen how to make ESP8266 as Access point and web server.

A Web server is a program that uses HTTP (Hypertext Transfer Protocol) to serve the files that form Web pages to users, in response to their requests, which are forwarded by their computers’ HTTP clients. Continue reading ESP8266 Web Server with HTML Web Page →

ESP8266 Web Server AP (Access Point)

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In this tutorial we are making ESP8266 as Access point and using it to make it web server. We have seen how to connect to WiFi Router and make web server in previous post.

A Web server is a program that uses HTTP (Hypertext Transfer Protocol) to serve the files that form Web pages to users, in response to their requests, which are forwarded by their computers’ HTTP clients. Continue reading ESP8266 Web Server AP (Access Point) →

Three Wire LCD Interface with Arduino

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We have seen parallel interface technique using Arduino library and we know that it requires 6 IO Lines, Now let’s see how we can reduce required IO’s using 74HC595. We know that we can reduce number IO required by using I2C based LCD interface circuit; It costs ten times more than 74HC595 Circuit.

Arduino 3 wire LCD interface circuit

            In this circuit similar to the bargraph display we are using 74HC595 Shift register to interface 16×2 LCD. Continue reading Three Wire LCD Interface with Arduino →