diff --git a/hardware/kicad/SIMtrace.sch b/hardware/kicad/SIMtrace.sch
index 2baadee..1ed2d15 100644
--- a/hardware/kicad/SIMtrace.sch
+++ b/hardware/kicad/SIMtrace.sch
@@ -265,7 +265,7 @@ F 0 "R22" V 2400 3750 50  0000 C CNN
 F 1 "100K" V 2300 3750 50  0000 C CNN
 F 2 "SM0603" H 2300 3750 60  0001 C CNN
 F 3 "" H 2300 3750 60  0001 C CNN
-F 4 "NP" V 2200 3750 50  0000 C CNN "Place"
+F 4 "DNP" V 2200 3750 50  0000 C CNN "Place"
 F 5 "no needed since we don't read FLAG" V 2300 3750 50  0001 C CNN "Note"
 	1    2300 3750
 	0    -1   -1   0   
@@ -827,8 +827,8 @@ F 0 "JP2" H 4500 1000 50  0000 C CNN
 F 1 "ERASE" H 3800 1000 40  0000 C CNN
 F 2 "PIN_ARRAY_2X1" H 4150 950 60  0001 C CNN
 F 3 "" H 4150 950 60  0001 C CNN
-F 4 "NP" H 4150 1000 50  0000 C CNN "Place"
-F 5 "the pertruding through pins might get shorted when the board lies on a conductive surface, leading to unwanted flash erase" H 4150 950 50  0001 C CNN "Note"
+F 4 "DNP" H 4150 1000 50  0000 C CNN "Place"
+F 5 "the protruding through hole pins might get shorted when the board lies on a conductive surface, leading to unwanted flash erase" H 4150 950 50  0001 C CNN "Note"
 	1    4150 950 
 	-1   0    0    -1  
 $EndComp
@@ -840,8 +840,8 @@ F 0 "JP1" H 3800 1100 50  0000 C CNN
 F 1 "TEST" H 4500 1100 40  0000 C CNN
 F 2 "PIN_ARRAY_2X1" H 4150 1050 60  0001 C CNN
 F 3 "" H 4150 1050 60  0001 C CNN
-F 4 "NP" H 4150 1100 50  0000 C CNN "Place"
-F 5 "the pertruding through pins might get shorted when the board lies on a conductive surface, leading to false signal" H 4150 1050 50  0001 C CNN "Note"
+F 4 "DNP" H 4150 1100 50  0000 C CNN "Place"
+F 5 "the protruding through hole pins might get shorted when the board lies on a conductive surface, leading to false signal" H 4150 1050 50  0001 C CNN "Note"
 	1    4150 1050
 	1    0    0    -1  
 $EndComp
@@ -1480,7 +1480,7 @@ F 0 "R24" H 3200 4800 40  0000 C CNN
 F 1 "100K" H 3200 4700 40  0000 C CNN
 F 2 "SM0603" V 2980 4700 30  0001 C CNN
 F 3 "" H 3050 4700 60  0001 C CNN
-F 4 "NP" H 3200 4600 50  0000 C CNN "Place"
+F 4 "DNP" H 3200 4600 50  0000 C CNN "Place"
 F 5 "not needed since we don't read VCC_SIM" H 3050 4700 50  0001 C CNN "Note"
 	1    3050 4700
 	1    0    0    -1  
@@ -1493,7 +1493,7 @@ F 0 "R15" H 3200 3250 40  0000 C CNN
 F 1 "100K" H 3200 3150 40  0000 C CNN
 F 2 "SM0603" V 2980 3150 30  0001 C CNN
 F 3 "" H 3050 3150 60  0001 C CNN
-F 4 "NP" H 3200 3050 50  0000 C CNN "Place"
+F 4 "DNP" H 3200 3050 50  0000 C CNN "Place"
 F 5 "not needed since we don't read VCC_SIM" H 3050 3150 50  0001 C CNN "Note"
 	1    3050 3150
 	1    0    0    -1  
@@ -2426,8 +2426,8 @@ F 3 "~" H 850 4450 60  0000 C CNN
 	1    850  4450
 	1    0    0    -1  
 $EndComp
-Text Notes 9250 6700 0    59   ~ 0
-NP = do Not Place (because not required)
+Text Notes 10100 6750 0    59   ~ 0
+DNP = Do Not Place\n(because not required)
 Wire Wire Line
 	2400 4300 3450 4300
 $EndSCHEMATC
diff --git a/hardware/pcb/schema/SIMtrace.pdf b/hardware/pcb/schema/SIMtrace.pdf
index 7371671..f499167 100644
Binary files a/hardware/pcb/schema/SIMtrace.pdf and b/hardware/pcb/schema/SIMtrace.pdf differ