Ohm's Law - Arduino L3 PDF

OHM’S LAW Lesson 3: Study the behavior of Electricity within a Circuit WHAT IS OHM’S LAW ▪ Ohm's Law is a key rule for analyzing electrical circuits, describing the relationship between three key physical quantities: voltage, current, and resistance. It represents that the current is proportional...

OHM’S LAW Lesson 3: Study the behavior of Electricity within a Circuit WHAT IS OHM’S LAW ▪ Ohm's Law is a key rule for analyzing electrical circuits, describing the relationship between three key physical quantities: voltage, current, and resistance. It represents that the current is proportional to the voltage, with the constant of proportionality being the resistance. ELECTRIC CIRCUIT ▪ An electric circuit involves the flow of charge in a complete conducting loop. ▪ Electrical circuit consists of batteries, resistors, inductors, capacitors, switches or transistors. TRANSISTOR ▪ A transistor is a semiconductor current to use used to amplify or switch electronic signals and electrical power. Transistors are one of the basic building blocks of modern electronics. CAPACITORS ▪ A capacitor is an electronic component characterized by its capacity to store an electric charge INDUCTORS ▪ An inductor is a passive component that is used in most power electronic circuits to store energy in the form of magnetic energy when electricity is applied to it. HISTORY OF OHM’S LAW German physicist and mathematician Georg Simon Ohm (March 16, 1789 - July 6, 1854 C.E.) conducted research in electricity in 1826 and 1827, publishing the results that came to be known as Ohm's Law in 1827. He was able to measure the current with a galvanometer, and tried a couple of different set-ups to establish his voltage difference. Georg Simon Ohm VOLTAGE ▪ Voltage is what makes electric charges move. It is the 'push' that causes charges to move in a wire or other electrical conductor. ▪ Conductor - a material or device that conducts or transmits heat, electricity, or sound, especially when regarded in terms of its capacity to do this. CURRENT ▪ Current is the flow of electrical charge carriers like electrons. Current flows from negative to positive points. The SI unit for measuring electric current is the ampere (A). RESISTANCE ▪ Resistance occurs when electrons aren’t able to move through a conductor freely. ▪ A resistor is a passive electrical component that adds a specific value of resistance to an electric circuit. ▪ Resistors are used to reduce current flow, adjust voltages, among others. A resistor functions by converting electrical energy into heat. DIFFERENT KIND OF RESISTORS Key difference between metal film and carbon film resistors is that metal film resistors use a metal film to limit the flow of electric current whereas carbon film resistors use a carbon film LET’S DO THE ACTIVITY MATERIALS ▪ Arduino UNO ▪ Breadboard ▪ Jumper Wires (M/M) ▪ Battery ▪ LED ▪ Resistor (220k) ▪ Switch SERIES CIRCUIT SERIES CIRCUIT ▪ One line or One loop circuit PARALLEL CIRCUIT PARALLEL CIRCUIT ▪ Parallel circuits are electrical circuits with multiple resistors, connected along many branches (or paths) of electricity. Here, current flows even if there is a break in one branch.