SunFounder ESP32 Starter Kit
5.9 L293D
L293D is a 4-channel motor driver integrated by chip with high voltage and high current. It’s designed to connect to
standard DTL, TTL logic level, and drive inductive loads (such as relay coils, DC, Stepper Motors) and power switching
transistors etc. DC Motors are devices that turn DC electrical energy into mechanical energy. They are widely used in
electrical drive for their superior speed regulation performance.
See the figure of pins below. L293D has two pins (Vcc1 and Vcc2) for power supply. Vcc2 is used to supply power for
the motor, while Vcc1 to supply for the chip. Since a small-sized DC motor is used here, connect both pins to +5V.
The following is the internal structure of L293D. Pin EN is an enable pin and only works with high level; A stands for
input and Y for output. You can see the relationship among them at the right bottom. When pin EN is High level, if A
is High, Y outputs high level; if A is Low, Y outputs Low level. When pin EN is Low level, the L293D does not work.
706 Chapter 5. Learn about the Components in Your Kit
To Next Page
Loading...
Need help?
General