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Fish Dish This board is available from PiSupply and is a simple board to use for a Traffic Light simulation with its 3 LEDs and buzzer and switch. It also has an added advantage of providing all of the GPIO pins for further expansion so any I2C device or any extra addon board can be piggy backed on top of it :)
The LEDS are called Led1..3, the buzzer is called buzzer and the switch is called switch (up and down)
The LEDs can also be referred to by name e.g red, yellow or green.