To control the max 600mA amount of current an internal “Darlington transistor sink” installed in it, which could be used to control a large amount of current by providing a small amount of current. Its diodes also save the controlling device and IC from back EMF. It could control any DC motor speed and direction with a voltage range of 4.5 – 36 Volts. It may be small in size, but its power output capacity is higher than our expectation. L293d bridge is controlled by external low voltage signals.
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H-Bridge is an electrical circuit that enables the load in a bidirectional way. L293d IC is known as a motor driver. It is a low voltage operating device like other ICs. The other ICs could have the same functions like L293d but they cannot provide the high voltage to the motor. L293d provides the continuous bidirectional Direct Current to the Motor. The Polarity of current can change at any time without affecting the whole IC or any other device in the circuit. L293d has an internal H-bridge installed for two motors. Another motor driver IC L298N L293D Motor Driver Introduction.There are multiple circuits by which motor could be rotated in both directions just by using some diodes and transistors. But those circuits are complex to make. To avoid the complexity and IC name l293d was invented by which not only direction, other multiple functions could be achieved just by the blink of an eye. But after the invention of the ICs DC motor again start gaining its popularity.Įvery AC and DC motor have the ability to rotate in both directions. AC motor has its own rules and usage, but DC motor could rotate in another direction just by changing the polarity of the current. Now a day mostly DC Motors are used to produce rotatory motion due to its high efficiency. But in some cases, we need to rotate the motor in both directions. Like robots, cars, etc. The usage of AC motor became very much popular in the 20th century. DC Motor in the late 19th century has its own use but after the discovery of AC motor by Nikola Tesla and a wide amount of usage of AC current in industry and houses.
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The DC motor was the first motor used by the scientist to convert the electric current to rotatory motion. It also shows that we can produce the magnetic field and motion by combining one of each with the current.Īfter the invention of right-hand rule, a DC motor was invented by British scientist William Sturgeon. The right-hand rule was invented in the 19th century and it shows that we can produce current by combining the magnetic field and motion by following some specific rules. APPLICATIONS of L293D Why do we need motors?.