The traffic light module is compact in size and easy to install.
It usually includes large LEDs, typically 8mm in size, for better visibility.
The LEDs are often active HIGH, meaning they are lit when a logic HIGH signal is applied to the module’s pins.
Built-in current limiting resistors ensure that the LEDs receive the appropriate amount of current.
The module is compatible with both 3.3V and 5V systems, making it versatile for different microcontroller platforms.
Some modules can be connected to the PWM (Pulse Width Modulation) pin of a microcontroller to control the brightness of the LEDs.