How-To

Raspberry pi as print server

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Making Raspberry pi as print server will help you in making your printer wireless. What you need ? Raspberry pi USB wireless dongle. USB Printer I am assuming that you have already setup raspberry pi with suitable OS.  Make sure that is is updated to latest version. To do so follow the following commands. sudo […]

Electronics

7 Segment Display

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A 7 segment display is typically used to display numbers from 0-9. It consists of 7 bar segments and a dot( 8 Segments). Segments are numbered A to F and DP for the dot or decimal place. There are 2 types of 7 Segment display –> Common Anode –> Common Cathode A common Anode display has […]

Electronics

How to use multiple solar panels?

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Calculating watts Power[watt]=Voltage[volt] * Current[Ampere] if the panel is rated as 5v 200 mA then Power=1 watt Wiring multiple solar panels Parallel wiring This is required if your application need more power than rated. By connecting the positive terminal of solar panel of one panel to positive terminal of another panel and similarly connecting negative […]

Electronics

How radio works?

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How does radio works? Audio signals are transmitted by imposing lower audio frequencies on the high frequency carrier wave. In other words the audio signals are added to the carrier frequency. Its amplitude is modulated. At the receiving end, a very simple combinations of a capacitor and a coil detect the carrier frequency out of […]

Electronics

Basic Electronics – Resistor Combinations

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RESISTOR COMBINATIONS When we do not get specific resistor values we have to either use variable resistors such as potentiometers or presets to obtain such precise values. Pots are too expensive to use forevery case. Another scheme is to combine two or more resistors to obtain the necessary precise values.Such resistor combinations can cost as […]

Electronics

LED Basics

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Today LED has become an integral part of consumer electronics. LED TV, LED Display, LED Lights and so on. These are becoming very popular because of there low power consumption. What is LED? LED stands for Light emitting diode. A light emitting diode is essentially a PN junction semiconductor diode that emits a monochromatic(single) colour […]

Electronics

Basic Electronics – 2

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Passive Components RESISTORS To oppose the flow of electrons ( current). The symbols are shown below. Resistance is measured in units called “Ohm”. 1000 ohms is shown as 1k ohm (103 ohm) and 1000 k ohm is shown as M.ohms (106ohm). Resistors can be broadly of two types. • Fixed Resistors and Variable Resistors. Fixed […]