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Maker_Pico_Box/main.py

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+import machine
+import time
+import neopixel
+
+# ============================================================
+#  HEARTBEAT CLASS — smooth fade with MIN + MAX brightness
+# ============================================================
+
+class HeartbeatFadeNeoPixel:
+    def __init__(self, neopixel_obj, pixel_index=0, color=(255, 0, 0),
+                 min_brightness=5, max_brightness=100,
+                 step=2, interval_ms=20):
+
+        self.np = neopixel_obj
+        self.index = pixel_index
+        self.color = color
+
+        self.min_brightness = min_brightness
+        self.max_brightness = max_brightness
+        self.step = step
+        self.interval = interval_ms
+
+        self.brightness = min_brightness
+        self.direction = 1          # 1 = fade up, -1 = fade down
+        self.last_time = time.ticks_ms()
+
+    def apply_brightness(self, c, level):
+        r, g, b = c
+        factor = level / 100
+        return (int(r * factor), int(g * factor), int(b * factor))
+
+    def update(self):
+        now = time.ticks_ms()
+        if time.ticks_diff(now, self.last_time) >= self.interval:
+            self.last_time = now
+
+            # Update brightness
+            self.brightness += self.direction * self.step
+
+            # Bounce at limits
+            if self.brightness >= self.max_brightness:
+                self.brightness = self.max_brightness
+                self.direction = -1
+
+            if self.brightness <= self.min_brightness:
+                self.brightness = self.min_brightness
+                self.direction = 1
+
+            # Apply brightness
+            self.np[self.index] = self.apply_brightness(self.color, self.brightness)
+            self.np.write()
+
+
+# ============================================================
+#  NEOPIXEL SETUP
+# ============================================================
+
+STRIP_PIN = 17
+STRIP_LEDS = 3
+strip = neopixel.NeoPixel(machine.Pin(STRIP_PIN), STRIP_LEDS)
+
+SINGLE_PIN = 28
+single = neopixel.NeoPixel(machine.Pin(SINGLE_PIN), 1)
+
+# ============================================================
+#  BUTTONS
+# ============================================================
+
+button_pins = [20, 21, 22]
+buttons = [machine.Pin(pin, machine.Pin.IN, machine.Pin.PULL_UP) for pin in button_pins]
+
+# ============================================================
+#  COLOR PALETTE
+# ============================================================
+
+colors = [
+    (0,   0,   0),     # Off
+    (255,   0,   0),   # Red
+    (0,   255,   0),   # Green
+    (0,     0, 255),   # Blue
+#     (255, 255,   0),   # Yellow
+#     (0,   255, 255),   # Cyan
+#     (255,   0, 255),   # Magenta
+#     (255, 128,   0),   # Orange
+#     (128,   0, 255),   # Purple
+#     (255,  20, 147),   # Pink
+#     (128, 255,   0),   # Lime
+    (255, 255, 255),   # White
+]
+
+# ============================================================
+#  STRIP STATE
+# ============================================================
+
+color_index = [0, 0, 0]
+brightness = [50, 50, 50]
+last_state = [1, 1, 1]
+press_time = [0, 0, 0]
+
+# ============================================================
+#  HEARTBEAT CONFIG (NOW HAS MIN + MAX)
+# ============================================================
+
+FLASH_COLOR_INDEX = 1    # Palette color
+FLASH_MIN = 1           # << lowest brightness (0–100)
+FLASH_MAX = 10          # << highest brightness
+FLASH_STEP = 0.2           # fade speed
+FLASH_INTERVAL_MS = 20   # smoothness
+
+heartbeat = HeartbeatFadeNeoPixel(
+    neopixel_obj=single,
+    pixel_index=0,
+    color=colors[FLASH_COLOR_INDEX],
+    min_brightness=FLASH_MIN,
+    max_brightness=FLASH_MAX,
+    step=FLASH_STEP,
+    interval_ms=FLASH_INTERVAL_MS
+)
+
+# ============================================================
+#  HELPERS
+# ============================================================
+
+def apply_brightness(color, level):
+    r, g, b = color
+    factor = level / 100
+    return (int(r * factor), int(g * factor), int(b * factor))
+
+def update_strip():
+    for i in range(STRIP_LEDS):
+        strip[i] = apply_brightness(colors[color_index[i]], brightness[i])
+    strip.write()
+
+# ============================================================
+#  INITIAL
+# ============================================================
+
+update_strip()
+
+# ============================================================
+#  MAIN LOOP
+# ============================================================
+
+while True:
+    now = time.ticks_ms()
+
+    # BUTTON CONTROLLED PIXELS (0–2)
+    for i in range(3):
+        state = buttons[i].value()
+
+        if last_state[i] == 1 and state == 0:
+            press_time[i] = now
+
+        if last_state[i] == 0 and state == 1:
+            duration = time.ticks_diff(now, press_time[i])
+
+            if duration > 500:
+                brightness[i] += 10
+                if brightness[i] > 100:
+                    brightness[i] = 10
+            else:
+                color_index[i] = (color_index[i] + 1) % len(colors)
+
+            update_strip()
+            time.sleep_ms(200)
+
+        last_state[i] = state
+
+    # HEARTBEAT ON GP28
+    heartbeat.update()
+
+    time.sleep_ms(10)