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In this article, we connect an KY-011 Dual Color LED to our Microbit – we will use Makecode and show the JaavScript and Python output as well.
The KY-011 Dual Color LED module can emit red and green light. You can adjust the intensity of each color using an Arduino PWM pin or simply switch the LED on/off.
| Operating Voltage | 2.0v ~ 2.5v |
| Working Current | 10mA |
| Color | Red + Green |
| Beam Angle | 150 |
| Wavelength | 571nm + 644nm |
| Luminosity Intensity (MCD) | 20-40; 40-80 |
Depending on the input voltage, series resistors are recommended.
| Series resistor (3.3 V) [Red] | 120 Ω |
| Series resistor (3,3 V) [Green] | 120 Ω |
Parts Required
| Name | Link | |
| Microbit | ![](http://ae01.alicdn.com/kf/Sc095f39f7e8c47be8df8b6d35e402d48m.jpg_140x140.jpg") |
|
| 37 in one sensor kit | ![](http://ae01.alicdn.com/kf/Scb660656a1534430bdd567806bc61643e.jpg_80x80.jpg") |
|
| Connecting cables |  |
Schematic/Connection
| Microbit | SENSOR |
|---|---|
| Pin 2 | LED Red |
| Pin 1 | LED Green |
| GND | GND |
Example
All of these are from the Microsoft Makecode site
MakeCode
Python
def on_button_pressed_a():
pins.digital_write_pin(DigitalPin.P1, 1)
pins.digital_write_pin(DigitalPin.P2, 0)
input.on_button_pressed(Button.A, on_button_pressed_a)
def on_button_pressed_b():
pins.digital_write_pin(DigitalPin.P1, 0)
pins.digital_write_pin(DigitalPin.P2, 1)
input.on_button_pressed(Button.B, on_button_pressed_b)
JavaScript
input.onButtonPressed(Button.A, function () {
pins.digitalWritePin(DigitalPin.P1, 1)
pins.digitalWritePin(DigitalPin.P2, 0)
})
input.onButtonPressed(Button.B, function () {
pins.digitalWritePin(DigitalPin.P1, 0)
pins.digitalWritePin(DigitalPin.P2, 1)
})
Output
Press the A button then the B button on the microbit
As an exercise can you add the ability if button A and B are both pressed the red and green are both switched off
Links