Two-colour LED Brick

Pictured with the KY-011 kit module plugged in.

Kit Bricks · SKU TP-K18

5 mm red / green common-cathode LED.

₹299

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Works with TinkerPie V1 · Arduino C++ with the TinkerPieBricks library · Delivery across India: ₹100, 3–7 days · 7-day replacement for damaged or defective kits

About this kit

5 mm red / green common-cathode LED. The Two-colour LED Brick is a carrier for the KY-011 module from common 37-in-1 sensor kits: plug the module into the socket and connect one cable to a TinkerPie SENSOR port. A small CH32V003 processor on the brick does the timing work, so your program simply reads the result over I2C.

Features

• Red, green and mixed yellow
• PWM brightness
• Plugs into the 3-pin LED socket
• Plug the kit module straight into the socket – no jumper wires
• One cable to any TinkerPie SENSOR port (I2C), BUS IN + BUS OUT to chain more bricks
• On-board CH32V003 does the timing – your code just reads the result

Specifications

How to use it with TinkerPie

1. Plug the KY-011 module into the 2.54 mm socket on the top edge. Match the pin names: the brick says R G B - (RGB) or - R G (two-colour), the module has the same letters.
2. Connect BUS IN to any TinkerPie SENSOR 1-4 port with a 4-pin JST-PH cable (the same cable as the other sensors).
3. More bricks? Plug the next one into BUS OUT. Two bricks of the same type need different addresses: bridge ADDR +1, +2 or +4 on the back (0x1C-0x1F; the first is 0x1C).
4. Install the TinkerPie and TinkerPieBricks Arduino libraries, open the quick-start sketch below, choose the board ESP32S3 Dev Module and upload.

Libraries: TinkerPie and TinkerPieBricks (Arduino IDE: Sketch → Include Library → Add .ZIP Library). Full guide: getting started with TinkerPie Bricks.

Quick start

Upload this, open the Serial Monitor at 115200 baud and watch the TinkerPie matrix.

// Two-colour LED Brick (TP-K18): quick start
// Reads the brick and shows the value on the TinkerPie matrix and in the Serial Monitor (115200 baud).
#include <TinkerPie.h>
#include <TinkerPieBricks.h>
using namespace tinkerpie;

tpb::KitLed led2;

void setup() {
  Serial.begin(115200);
  tinkerpie::begin();            // also starts the SENSOR ports (I2C bus Wire1)
  if (!led2.begin()) Serial.println("Two-colour LED Brick not found at 0x1C: check the cable to SENSOR 1-4");
  led2.fade(300);                  // smooth changes
}

void loop() {
  led2.red(255); led2.green(0);     // red
  basic::pause(1000);
  led2.red(0); led2.green(255);     // green
  basic::pause(1000);
  led2.red(255); led2.green(120);   // mixed: yellow / orange
  basic::pause(1000);
}

Project: Battery status light

The two-colour LED shows the TinkerPie battery: green above 50 %, yellow above 20 %, red below.

// Battery status light: Two-colour LED Brick (TP-K18)
// The two-colour LED shows the TinkerPie battery: green above 50 %, yellow above 20 %, red below.
#include <TinkerPie.h>
#include <TinkerPieBricks.h>
using namespace tinkerpie;

tpb::KitLed st;

void setup() {
  Serial.begin(115200);
  tinkerpie::begin();            // also starts the SENSOR ports (I2C bus Wire1)
  if (!st.begin()) Serial.println("Two-colour LED Brick not found at 0x1C: check the cable to SENSOR 1-4");
  st.fade(400);
}

void loop() {
  double b = input::batteryLevel();
  if (b > 50) { st.red(0); st.green(255); }
  else if (b > 20) { st.red(255); st.green(140); }
  else { st.red(255); st.green(0); }
  basic::pause(2000);
}

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