diff --git a/config.h b/config.h
index 1e0560d..2ac8fd6 100644
--- a/config.h
+++ b/config.h
@@ -7,12 +7,18 @@
 
 // Times in ms
 #define PULSE_DURATION 30
-#define DEBOUNCE_TIME 100
+#define DEBOUNCE_TIME  50  // was 100
 
 // RISING, FALLING, EITHER
 #define TRIGGER_TYPE RISING
+// RISING = being disconnected
+// FALLING = being connected
 
 // If defined, active low, else active high
 #define OFF_HIGH
 
-#endif
+// Pull-up resistor configuration
+// Enable or disable the internal pull-up resistor for the input pin
+#define PULLUP_ENABLED 1
+
+#endif /* __CONFIG_H__ */
diff --git a/main.c b/main.c
index ea7c20b..0d7271f 100644
--- a/main.c
+++ b/main.c
@@ -91,7 +91,13 @@ int main() {
     cbi(PORTB, OUTPUT_PIN);
 #endif
 
-    while(1) { sleep(); };
+#ifdef PULLUP_ENABLED
+    sbi(PORTB, INPUT_PIN);
+#endif
+
+    while (1) {
+        sleep();
+    };
 
     return 0;
 }