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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. Assume you have a 3 volt supply and wish to attach a single red LED to it. What kind of resistor do we require? 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. 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 m...

B.E B.Tech Degree in Electronics Final Year Projects Idea

It's time to submit your Final Year BE Project abstracts. Your search for good computer and electronics project ideas ends here. www.electronicsprojectspune.com provides project ideas and abstracts with world-class quality. Many times students face difficulty in understanding the technology behind a project. Our collection of ideas and abstracts are compiled by experts in the industry. Every day more and more projects are being added to the system. A dedicated team of working professionals is working to make this site useful for the students searching for their Final Year BE Projects. We update the projects every week so that we capture the latest technology trends in the market and create projects based on that Below is the list of a few technologies on which you can build your Final Year BE Project. Take a look at it before you submit your project abstract : GPS Based Final Year BE Projects GSM Based Final Year BE Projects ZIGBEE Based Final Year BE Projects RFID Based Final Year...

Basic Electronics Tutorial

Basic Electronics ideas that provide the groundwork for today's electrical, electronics, and radio technologies. current, voltage, resistance, and so on Basic Electronics Tutorials and Revision is a free online Electronics Tutorials Resource for Beginners What is Current What is Voltage What is Resistor What are transistors and how do they work? What is Diode Diode All Types What is Transistor

Interfacing Push button switch with AT89S52 Microcontroller.

This tutorial is for beginners in the field of micro-controller. The purpose of this tutorial is to use of push-button switch with the micro-controller. It will be useful whenever a decision is to be made according to the press of a switch. Input/output devices are very critical components of an embedded system. The first input device we will study is the switch. It allows the human to input binary information into the microcontroller. Typically we define the Two-state, logic as true when the switch is pressed. logic false, when the switch is not pressed. A single pole single throw (SPST) switch has two connections. The switches are shown as open circuits in Figure 1. which is a normally open switch (NO), the resistance between the connections is infinite (over 1000 MΩ) if the switch is not pressed and zero (under 0.1 Ω) if the switch is pressed. A switch has a two-state open state and a closed state. And the state of the switch is monitored by the microcontroller at a digital inp...

74HC165 Shift Register and your Arduino UNO

Today in this tutorial I'll explain to you how to control the 74HC165 parallel in serial out(PISO) shift register using your ARDUINO board. Here we used 74HC165 for increasing numbers of inputs of your ARDUINO board. Shift registers are often used for the purpose of saving pins on a microcontroller. Every microcontroller has a limited number of pins for general inputs and outputs (GPIO). Sometimes we have required more inputs and our controller does not provide such inputs at that time parallel in serial out(PISO) shift register is used to increase inputs. An 8-bit shift register needs 4 lines of a microcontroller. One pin to clock for data transfer, one for clock enable, one for shifting/loading/latching the bits, and one for serial data transfer. Here we used only 3 pins of microcontrollers. One pin for loading the bits, one pin to clock for data transfer, one pin to serial data transfer. In 74HC165 Clock enable pin is active low so we connect it to the ground. Two 74HC165 can be...

8051 Microcontroller Project Idea

Auto Intensity Control of Street Lights Auto Metro Train to Shuttle Between Stations Auto Power Supply Control from 4 Different Sources: Solar, Mains, Generator & Inverter to Ensure No Break Power Automatic Bell System for Institutions Automatic Dialing to Any Telephone Using I2C Protocol on Detecting Burglary Automatic Irrigation System on Sensing Soil Moisture Content Automatic Surveillance Camera Panning System from PC Automatic Wireless Health Monitoring System in Hospitals for Patients Beacon Flasher Using Microcontroller Bidirectional Rotation of an Induction Motor with a Remote Control Device BLDC Motor Speed Control with RPM Display Cell Phone Based DTMF Controlled Garage Door Opening System Cell Phone Controlled Robotic Vehicle Closed-Loop Control for a Brushless DC Motor to Run at the Exactly Entered Speed Cyclo Converter Using Thyristors Density Based Traffic Signal System Detecting Power Grid Synchronization Failure on Sensing Frequency or Voltage Beyond Acceptable Rang...

Diploma level 298 project idea list

4 Digit Object Counter 8 Digit Object Counter 8 Digit Pulse Counter 8 Digit Frequency Meter Digital Flow Meter Automatic Digital Time Switch System Automatic Frequency Counter Automatic Tank Monitoring and Controlling System Digital Anemometer (Wind Speed) Digital Bank Token Number Display System Digital Clock cum Calendar Digital Sequence Detector Digital Tacho Meter Digital Taxi Fare Meterv Digital Temperature monitoring system Digital Thermometer Digital Thickness Calculator Digital Visitor Counter Digital Wide Range Thermometer Frequency Meter and Event Counter Module Infrared interruption counter Programmable Oil level Monitoring and Controlling System Programmable Speed Control for DC Motor Programmable Temperature Monitor and Control Automatic Railway Gate Controlling Railway Signaling and Gate Controlling Railway Information Display System for Passengers Remote Control for Home Appliances Stepper Motor Control System Auto rotating Video graphic Camera Air Cooling System Ba...

BE electronics and electrical Project idea list

Nunc blandit orci sit amet risus Advance Airbag systems using ARM controller Advance bank security systems using AVR Advance bank security systems using AVR and graphics LCD Advance Bike security systems using ARM and advanced MEMS sensor Advance Bike security systems using AVR and advanced MEMS sensor Advance Airbag systems using MEMS sensor Advance bank security systems using ARM Advance bank security systems using ARM and graphics LCD Advance Door security systems using ARM Advance Door security systems using ARM and graphics LCD Advance Door security systems using AVR Advance Door security systems using AVR and graphics LCD Advance multipoint temperature measurement using ARM and graphics LCD Advance multipoint temperature measurement using AVR and graphics LCD Advance security systems using ARM Advance security systems using ARM and graphics LCD Advance Ticket collecting systems using ARM Advance Ticket collecting systems using ARM with PC interface Advance Ticket collecting ...