There are several way to interface LED. Figure below show Active-High and Active-Low configuration.
Cheat Sheet: LED
LCD
Figure below show the connection of Alphabet LCD in 4-bit connection.
Cheat Sheet: LED
L298 is a motor driver IC that can operate up to 4A. Figure below show the configuration of motor driver in full speed.
Cheat Sheet - Motor Driver L298
Motor Driver - Relay
Relay can be use as a motor driver too. Figure below show the configuration of a motor driver using relay.
Cheat Sheet - Motor Driver using Relay
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