Initial commit: Add smart arcade button alarm clock

2026-04-30 13:32:32 +02:00
commit f44e0c5fdb
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+# Arcade Button Wiring - Pi 4
+
+## Components
+- Arcade Button 33mm illuminated (bastelgarage.ch)
+- Raspberry Pi 4 Model B
+
+## GPIO Header Pinout
+
+```
+    3.3V  (1)  (2)  5V
+    GPIO 2  (3)  (4)  5V
+    GPIO 3  (5)  (6)  GND
+    GPIO 4  (7)  (8)  GPIO 14
+       GND  (9)  (10) GPIO 15
+   GPIO 17 (11) (12) GPIO 18
+   GPIO 27 (13) (14) GND        ← LED
+       GND (15) (16) GPIO 23
+       ...
+```
+
+## Circuit (without transistor)
+
+### LED (GPIO controlled)
+```
+    3.3V (Pin 1) ─── LED + (from button)
+                        │
+                       LED - 
+                        │
+    GPIO 27 (Pin 13) ───┘
+```
+
+### Button
+```
+    GPIO 17 (Pin 11) ─── Button Contact 1
+                          Button Contact 2 ─── GND (Pin 6)
+```
+
+## Logic
+| GPIO 27 | LED  |
+|---------|------|
+| HIGH    | OFF  |
+| LOW     | ON   |
+
+## LED Specs (resistor already included)
+- Operating voltage: 5V to 12V
+- At 3.3V: slightly less bright, but works
+
+## Next Steps
+1. Verify wiring
+2. Python script for testing:
+```python
+import RPi.GPIO as GPIO
+import time
+
+GPIO.setmode(GPIO.BCM)
+
+# LED on GPIO 27
+GPIO.setup(27, GPIO.OUT)
+
+# Button on GPIO 17
+GPIO.setup(17, GPIO.IN, pull_up_down=GPIO.PUD_UP)
+
+try:
+    while True:
+        if GPIO.input(17) == False:  # Button pressed
+            GPIO.output(27, GPIO.LOW)  # LED ON
+        else:
+            GPIO.output(27, GPIO.HIGH)  # LED OFF
+        time.sleep(0.1)
+except KeyboardInterrupt:
+    GPIO.cleanup()
+```