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In this article, we connect an KY-034 7 color flashing LED to an Arduino Uno
If the KY-034 7 color flashing LED module is supplied with voltage, a color sequence is automatically emitted by the LED. The LED has 7 different colors and thus also all resulting mixed colors.
| Working voltage | 3V — 5V DC |
| LED model | YB-3120B4PnYG-PM |
| LED type | 5mm round head |
Parts Required
You can connect to the module using dupont style jumper wire.
This should work with other Arduino board – I have tried an Uno and Mega
| Name | Link | |
| Arduino Uno |  |
|
| 37 in one sensor kit | ![](http://ae01.alicdn.com/kf/Scb660656a1534430bdd567806bc61643e.jpg_80x80.jpg") |
|
| Connecting cables |  |
Schematic/Connection
Connect the signal pin (S) to pin 13 on the Arduino, then connect the ground pin (-) to GND.
The middle pin and the (-) pin are connected on this particular module, and they both act as ground.
Code Example
int ledPin = 11; // pin to control KY-034
void setup()
{
pinMode(ledPin, OUTPUT); // define pin as output
}
void loop()
{
digitalWrite(ledPin, HIGH); // turn LED on
delay(3000); // wait for 3 seconds
digitalWrite(ledPin, LOW); // turn LED off
delay(1000); // wait for a second
}
Serial Monitor Output
N/A
Links
https://github.com/getelectronics/ArduinoCode/tree/main/37%20Sensor%20Kit/KY-034_7_Color_Flash