Project 1：Led Blinks - Keyestudio KS4028 Manual

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or control board. And you need to connect a power in case that power
supply is weak.
Project 1：LED Blinks
(1)Project Introduction
We've set up the micro:bit smart home. Now let's get started from the
most simple experiment---LED blink.
LED is a type of semiconductor called "Light Emitting Diode "which is an
electronic device made of semiconductor materials (silicon, selenium,
germanium, etc.). It features unidirectional conductivity, that is, the
positive voltage is applied to the anode (long leg) and the cathode (short
leg) of the diode. when the voltage of its anode is higher than the voltage
of its cathode, thus, the diode is turned on(LED is on). When a reverse
voltage is applied to the anode and cathode, the diode is
disconnected(that is, the LED is off). Therefore, the disconnection and
connection of the diode is equivalent to turning on and off LED.
Light-emitting diodes have an anode (+) and a cathode (-), and they can
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