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Industrial VS Commercial VS Residential Electrical Installation

Hey, in this article we are going to see the comparison between Industrial, Commercial, and Residential Electrical installation. We will make compare with respect to types, procedure, cost, safety, equipment, and many other essential factors. First of all, let's know what is electrical installation. Electrical installation is a procedure to install electrical circuits, wirings, equipment, and machines. The electrical installation can be divided into three major parts - 1. Installing of electrical equipment or device or machine 2. Make electrical connection or wiring for them 3. Provide them proper voltage and power to operate them. These different types of electrical installation required different types of electricians and management. For example, commercial electrical installation requires commercial electricians, industrial electrical installation requires industrial electricians, and residential electrical installation requires residential electricians. We already published an ...
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How to Build Simple LED circuit | Calculate current limit Resistor

Circuit Design for LEDs. Discover how to create LED circuits. How to determine resistor size, how to protect LEDs, how long a battery will power a circuit, how to calculate resistor power rating, how to connect LEDs, and more. These are light-emitting diodes or LEDs. When a current is sent through one, light is produced. However, if we surpass its voltage and current limits, it will be destroyed immediately. The interior of the LED contains a small wire that can only withstand a particular amount of current.
How to Build Simple LED circuit | Calculate current limit Resistor

Assume you have a 3 volt supply and wish to attach a single red LED to it.

3v battery

What kind of resistor do we require?

How to Build Simple LED circuit | Calculate current limit Resistor

We know that this wire is 3 volts and that this wire is 0 volts. Because the led has a voltage loss of about 2 volts, our resistor must eliminate the remaining 3 volts. 
How to Build Simple LED circuit | Calculate current limit Resistor

To get 1 volt, subtract 2 volts. Because the led requires around 20 milliamps of current, 1 volt divided by 0.02 amps equals 50 ohms of resistance. For this computation, make sure you convert your milliamps to amps. We have a calculator on our website where you can just enter your data to make it easy. 

How to Build Simple LED circuit | Calculate current limit Resistor

Now go ahead and attempt to solve this one before I post your answers in the comments area below.

Example

Let's imagine we have a 9-volt battery and wish to attach a yellow led that consumes 20 milliamps of current and has a voltage drop of 2 volts.

How to Build Simple LED circuit | Calculate current limit Resistor

Current Limit Resistor Selection

How big of a resistor do you need? We have a 9-volt supply, so we deduct 2 volts for the led, leaving us with a 7-volt drop for the resistor. Because the current is 20 milliamps, the resistance is 350 ohms when 7 is divided by 0.02 amps. 

How to Build Simple LED circuit | Calculate current limit Resistor

The issue now is that we lack a 350-ohm resistor. Only 330 or 390 ohms are available. So, which should we go with? We must guarantee that the current does not exceed 20 milliamps, as we observed before.

To accomplish so, divide the needed voltage drop of 7 volts by the resistor value of 330 ohms to obtain 0.021 amps, then repeat for the 390-ohm resistor to obtain 0.018 amps. We may also combine resistors to obtain the exact value we want

led resistor calculator formula

To calculate the resistor value, we'll use the formula below: (Battery Voltage - LED Voltage) / desired LED current = resistor. The numbers are (12-3.4)/. 010=860 ohms for a standard white LED that uses 10mA and is supplied by 12V. Sum the current values to utilize many LEDs in parallel.

How to Build Simple LED circuit | Calculate current limit Resistor

Battery Backup Calculation

How long will this battery last in order to power our circuit? Let's pretend this battery has a 500 milliamp-hour rating. Simply divide this by the entire circuit current, which is 18 milliamps in this example. So we get roughly 27 hours if we split 500 milliamp hours by 18 milliamps.

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