Pixel Trinkey Analog JST pin

[mikeysklar]

Adding analog support to the 3-pin JST A6.

Based on an Adafruit forum issue and help from user bullimore.

Tested with Trinkey Pixel and high density dotstar strip with the following code. Dims and brightnes with potentiometer adjustment.

#include <Adafruit_DotStar.h>

#define NUMPIXELS 72
#define ANALOG_PIN A6 

Adafruit_DotStar dotstrip(NUMPIXELS, PIN_DATA, PIN_CLOCK, DOTSTAR_BRG);

void setup() {
  Serial.begin(115200);
  dotstrip.begin();
  dotstrip.setBrightness(10);  // Initial brightness
  dotstrip.show();
}

void loop() {
  // Read the analog value 
  int sensorValue = analogRead(ANALOG_PIN);

  // Map the analog value (0-1023) to brightness (0-255)
  int brightness = map(sensorValue, 0, 1023, 0, 255);

  // Set the brightness of the LED strip
  dotstrip.setBrightness(brightness);

  // Optionally, print the sensor value and brightness for debugging
  Serial.print("Sensor Value: ");
  Serial.print(sensorValue);
  Serial.print(" Brightness: ");
  Serial.println(brightness);

  // Set all pixels to white with the adjusted brightness
  for (int i = 0; i < dotstrip.numPixels(); i++) {
    dotstrip.setPixelColor(i, dotstrip.Color(255, 255, 255));  // White color
  }
  dotstrip.show();  // Update the strip to show the new brightness
  delay(100);  // Short delay to make brightness changes smoother
}

[mikeysklar]

@ladyada please review.

[ladyada]

thanks!