And now another interesting little project. After seeing numerous online projects I decided to build my own simple NiMH battery charger circuit using NiMH batteries because a bunch of GP2100 series NiMH cells are lying on the shelf. Technical Specification of the NiMH cell is given below: GP 2100 series NiMH Cell 2V minimum 2000mAh Standard… [Read More]
DHT11 Sensor Primer
In this guide we will learn how to play with a cheap ‘n’ cheerful temperature and humidity sensor DHT11 – the minuscule 4-pin sensor accurate enough for most do it yourself projects need to read and record humidity and temperature levels. Sensor Overview The DHT11 sensor is a perfect blend of one temperature sensor and… [Read More]
Voltage Divider and Current Divider
Voltage Divider and Current Divider are the most common rules applied in practical electronics. As you know, there are two types of combinations in a circuit, they are series and parallel connections. Parallel circuits are also known as current divider circuits because, in these circuits, the current is divided through each resistor. Whereas, series circuits… [Read More]
Conductance and Resistivity
Conductance, Temperature coefficient, resistivity and specific resistance are the properties of an electric conductor or any other material. They all can be understood by resistance. Resistance is the amount of obstruction in the flow of current. Means resistance is the obstruction in the flow of electrons. All these properties of the material can be understood… [Read More]
What is an Electric Circuit?
Electric circuit is an interconnection of electrical components. An electrical circuit consists of batteries, resistors, inductors, capacitors, switches or transistors. An electrical network consists of a closed loop. A circuit is a closed path where electrons flow in a wire. As long as the copper wire is allowed to itself, the electrons drift between the… [Read More]
Types of Resistors
Resistors can be seen in almost all electronic circuits. There are many types of resistors and they can be divided into two groups namely fixed resistor and adjustable resistor (variable resistor). The main function of the resistor is to resist the flow of electric current and regulate the flow of electrons. This is done by… [Read More]
Voltage Source and Current Source – Ideal vs. Practical
A source is a device which converts mechanical, chemical, thermal or some other form of energy to electrical energy. The types of sources available in the electrical network are the voltage source and the current source. The voltage source is used to provide voltage to the load while the current source is used to apply… [Read More]
What is Electrical Resistance?
The electrical resistance of an electrical conductor is a measure of the difficulty to pass an electric current through that conductor. A conductor has free electrons randomly moving inside. When an electric potential is applied to it, the electrons collide with other atoms and molecules of the conductor. The atoms and molecules create the obstruction in the flow of electrons…. [Read More]
How to Measure Current in a circuit using Ammeter
Current is the measure of the rate of flow of electric charges across the conductor. It is measured in the unit of Ampere. This current measurement in a circuit is mostly done by Ammeter. Ammeter Ammeter measures the electric current in the circuit. The name is derived from the SI unit of electric current, ampere…. [Read More]
Alternating Current (AC) vs. Direct Current (DC)
Electric current is the amount of electric charges that passes through a wire with respect to time. When battery is connected across a conductor, electrons move from negative terminal to positive terminal of battery. They move with very high velocity (more than the speed of light) and thus produce some amount of heat energy. Due… [Read More]
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