diff --git a/docs/notes/hardware/power_switch.md b/docs/notes/hardware/power_switch.md
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+## GOIO PIN
+
+|PIN|NAME|
+|----|----|
+|5|GPIO3(SCL)|
+|6|GND|
+
+## Config
+
+**/boot/config.txt**
+
+add:
+
+```
+dtoverlay=gpio-shutdown
+```
+
+## PI GPIO