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http://www.electricaltechnology.org/2013/03/what-is-rule-of-capacitor-in-ac-and-dc.html #

What is the Role of Capacitor in AC and DC Circuit? What is the role & behavior of capacitor in ac and dc circuits Types of Capacitors: Polar and Non Polar Capacitors with Symbols Capacitors Symbols & formula uses and application of Capacitor in AC and DC systems and network

sistema de controlo de um motor passo com arduino

Stepper Motor Control System Based On Arduino With ULN2003 Chip This project uses ULN2003 chip to drive. The working voltage is DC5V. It is widely used on ATM machine, inkjet printer,cutting plotter, fax machine,spraying equipment, medical instruments and equipments, PC peripheral, and USB Mass Storage ,precise instrument,industrial control system,office automat…

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http://electricaltechnology.org/2013/08/how-to-calculate-value-of-resistor-for-LED-circuits.html

How to calculate the value of resistor for LED’s (with different types of LED’s circuits) -... This tutorial will help you to find the proper value of resistor (or resistors) for one or more LED’s to connect with battery. If you pick this topic, you will be able to: Calculate the value of resistors for different LED’s Circuit diagrams Calculate the Forward Current of LED’s Calculate the Forw…