TINKER PIEDESIGN IN INDIA

Knob colour mixer

Turn a potentiometer to slide the whole matrix through every colour of the rainbow.

Sensor projectsknobcolour

Open in TinkerPie Studio

What you need

Wiring

Potentiometer: middle pin → P10, outer pins → 3.3 V and GND.

Step by step

  1. Open Knob colour mixer in TinkerPie Studio. It opens as blocks.
  2. Wire it: Potentiometer: middle pin → P10, outer pins → 3.3 V and GND.
  3. Press Run to try it in the simulator. Use the sliders and buttons under the board picture to test it.
  4. Connect TinkerPie with a USB-C cable in Chrome or Edge, press Connect, then Download. Or, with Studio started from the TinkerPie launcher on your computer, open the Arduino C++ tab and press Build & Flash.
  5. Change something: a colour, a number, a sound. Then run it again.

The code

This is the program the blocks make. The same program runs in the simulator and on the board.

JavaScript
var hue;

basic.forever(function () {
  hue = math.map(sensors.potentiometer(Pin.P10), 0, 100, 0, 360);
  led.fill(colors.hsv(hue, 100, 100));
  serial.writeValue('hue', hue);
  basic.pause(50);
});
Arduino C++ (TinkerPie library)
// Knob colour mixer
// Arduino C++ made by TinkerPie Studio from the blocks. Board: TinkerPie V1 (ESP32-S3).
// Arduino IDE: install the TinkerPie library (Studio menu > Arduino library), then Tools > Board > ESP32S3 Dev Module,
// USB CDC On Boot: Enabled, Flash Size: 16MB, Partition Scheme: 16M Flash (3MB APP/9.9MB FATFS), PSRAM: OPI PSRAM.
#include <TinkerPie.h>
using namespace tinkerpie;

double hue = 0;

void setup() {
  tinkerpie::begin();
  basic::forever([]() {
    hue = math::map(sensors::potentiometer(Pin::P10), 0, 100, 0, 360);
    led::fill(colors::hsv(hue, 100, 100));
    serial::writeValue("hue", hue);
    basic::pause(50);
  });
}

void loop() {
  tinkerpie::loop();   // runs the forever blocks and handles events
}

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