Bi-colour LED

Bi-colour LEDs contain two LEDs connected in ‘inverse parallel’. The two LEDs are often green and red. This means if current flows one way through the device the LED lights green, and if current flows the other way the LED lights red.

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Schematic

PCB

Flash a bi-colour LED

This program will cause a bi-colour LED to flash one colour and then the other. The LED should be connected with an inline resistor between output pin B.1 and output pin B.2.

Code Example:
main:	high B.1	; Select one colour
	low  B.2
	pause 250	; Keep the LED on for a short while

        low B.1		; Turn the LED off (set both outputs low)
	pause 500	; Keep the LED off for a while

	high B.2	; Select the other colour
	low  B.1
	pause 250	; Keep the LED on for a short while

        low B.2		; Turn the LED off (set both outputs low)
	pause 500	; Keep the LED off for a while
	goto main	; Repeat
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Create Module

A bi-colour LED may be connected (with a 330R series resistor) to the two centre contacts of two generic terminal block create modules.

Bill of Materials

DescriptionCodeQty
Bi-colour red/green 5mm LED LED006 1 Buy Now
330 ohm resistor (pack 100) RES330R 1 Buy Now

Simulation

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