diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..181d655
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.~lock*
diff --git a/board/water_level.sch b/board/water_level.sch
index ce05897..716fc36 100644
--- a/board/water_level.sch
+++ b/board/water_level.sch
@@ -236,55 +236,9 @@ Wire Wire Line
 	4600 1950 4600 1800
 Wire Wire Line
 	4600 1800 4850 1800
-$Comp
-L Device:R R1
-U 1 1 5EA37243
-P 5600 1800
-F 0 "R1" V 5393 1800 50  0000 C CNN
-F 1 "330R" V 5484 1800 50  0000 C CNN
-F 2 "Resistor_SMD:R_0603_1608Metric" V 5530 1800 50  0001 C CNN
-F 3 "https://docs.rs-online.com/236a/0900766b80d98afc.pdf" H 5600 1800 50  0001 C CNN
-F 4 "https://de.rs-online.com/web/p/smd-widerstande/6790226/" V 5600 1800 50  0001 C CNN "Source"
-	1    5600 1800
-	0    1    1    0   
-$EndComp
-$Comp
-L Device:R R2
-U 1 1 5EA37762
-P 6100 1450
-F 0 "R2" H 6030 1404 50  0000 R CNN
-F 1 "10k" H 6030 1495 50  0000 R CNN
-F 2 "Resistor_SMD:R_0603_1608Metric" V 6030 1450 50  0001 C CNN
-F 3 "https://docs.rs-online.com/236a/0900766b80d98afc.pdf" H 6100 1450 50  0001 C CNN
-F 4 "https://de.rs-online.com/web/p/smd-widerstande/6789667/" H 6100 1450 50  0001 C CNN "Source"
-	1    6100 1450
-	-1   0    0    1   
-$EndComp
-Wire Wire Line
-	5750 1800 6100 1800
-Wire Wire Line
-	6100 1800 6100 1600
 Wire Wire Line
 	5250 1800 5450 1800
 $Comp
-L power:VCC #PWR0108
-U 1 1 5EA38C71
-P 6100 1150
-F 0 "#PWR0108" H 6100 1000 50  0001 C CNN
-F 1 "VCC" H 6117 1323 50  0000 C CNN
-F 2 "" H 6100 1150 50  0001 C CNN
-F 3 "" H 6100 1150 50  0001 C CNN
-	1    6100 1150
-	1    0    0    -1  
-$EndComp
-Wire Wire Line
-	6100 1150 6100 1300
-Wire Wire Line
-	6100 1800 6350 1800
-Connection ~ 6100 1800
-Text GLabel 6350 1800 2    50   Input ~ 0
-RESET
-$Comp
 L Connector:Conn_01x03_Male J3
 U 1 1 5EA3FD12
 P 8050 1900
@@ -563,7 +517,6 @@ Text Label 6750 4250 0    50   ~ 0
 M87.5
 Text Label 6750 4350 0    50   ~ 0
 M100.0
-NoConn ~ 5950 3250
 NoConn ~ 5950 4050
 NoConn ~ 5950 4150
 Wire Wire Line
@@ -637,4 +590,10 @@ Wire Wire Line
 	9850 3650 10000 3650
 Wire Wire Line
 	10000 3650 10000 3750
+Wire Wire Line
+	5950 3250 6300 3250
+Text GLabel 6300 3250 2    50   Input ~ 0
+USR_BTN
+Text GLabel 5450 1800 2    50   Input ~ 0
+USR_BTN
 $EndSCHEMATC