It can automatically flash built-in colors after power on.
– 1 * SunFounder Uno board
– 1 * USB data cable
– 1 * 7-color auto-flash LED module
– Several jumper wires
When being power on, the 7-color auto-flash LED will flash built-in colors.
Just connect pin S to 5V of the SunFounder Uno board and pin – to GND.
Now, you can see the 7-color auto-flash LED flashing seven colors.