Merge pull request #2295 from adafruit/led-noodle-lantern

adding code for led noodle lantern

Author: TheKitty

LED_Noodle_Lantern/code.py

@@ -0,0 +1,43 @@
+# SPDX-FileCopyrightText: 2022 Noe Ruiz for Adafruit Industries
+# SPDX-License-Identifier: MIT
+# Adafruit nOOds lantern with "analog" (PWM) brightness control using GPIO.
+# Uses 6 nOOds, anode (+) to GPIO pin, cathode (-) to ground.
+# A current-limiting resistor (e.g. 10 Ohm) can go at either end.
+
+import math
+import time
+import board
+import pwmio
+from digitalio import DigitalInOut, Direction, Pull
+
+PINS = (board.SCK, board.MOSI, board.A1, board.A3, board.MISO, board.A2) # List of pins
+GAMMA = 2.6  # For perceptually-linear brightness
+
+# Convert pin number list to PWMOut object list
+pin_list = [pwmio.PWMOut(pin, frequency=1000, duty_cycle=0) for pin in PINS]
+
+# Button switch set up
+switch = DigitalInOut(board.A0)
+switch.direction = Direction.INPUT
+switch.pull = Pull.UP
+
+# LED set up
+led = DigitalInOut(board.TX)
+led.direction = Direction.OUTPUT
+
+while True: # Repeat forever...
+    # If the button is pressed turn on LED n00ds
+    if switch.value:
+        for i, pin in enumerate(pin_list): # For each pin...
+            # Calc sine wave, phase offset for each pin, with gamma correction.
+            # If using red, green, blue nOOds, you'll get a cycle of hues.
+            phase = (time.monotonic() - 2 * i / len(PINS)) * math.pi
+            brightness = int((math.sin(phase) + 1.0) * 0.5 ** GAMMA * 65535 + 0.5)
+            pin.duty_cycle = brightness
+        led.value = True # Turn button LED on
+    else: # Otherwise turn LED n00ds off
+        for i, pin in enumerate(pin_list):
+            pin.duty_cycle = 0
+        led.value = False # Turn button LED off
+
+    time.sleep(.01)