diff --git a/documentation/AMS1117.pdf b/documentation/AMS1117.pdf
new file mode 100644
index 0000000..421be40
Binary files /dev/null and b/documentation/AMS1117.pdf differ
diff --git a/schematic/KiCad/TOSR-04-cache.lib b/schematic/KiCad/TOSR-04-cache.lib
index 5fe1333..8b5eb06 100644
--- a/schematic/KiCad/TOSR-04-cache.lib
+++ b/schematic/KiCad/TOSR-04-cache.lib
@@ -131,6 +131,24 @@ X Shield 6 -100 -400 100 U 50 50 1 1 P
 ENDDRAW
 ENDDEF
 #
+# Device_C
+#
+DEF Device_C C 0 10 N Y 1 F N
+F0 "C" 25 100 50 H V L CNN
+F1 "Device_C" 25 -100 50 H V L CNN
+F2 "" 38 -150 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ C_*
+$ENDFPLIST
+DRAW
+P 2 0 1 20 -80 -30 80 -30 N
+P 2 0 1 20 -80 30 80 30 N
+X ~ 1 0 150 110 D 50 50 1 1 P
+X ~ 2 0 -150 110 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
 # Device_Crystal_GND24_Small
 #
 DEF Device_Crystal_GND24_Small Y 0 40 Y N 1 F N
@@ -154,25 +172,25 @@ X 4 4 0 100 25 D 30 50 1 1 P
 ENDDRAW
 ENDDEF
 #
-# Device_Jumper
+# Device_D_Schottky
 #
-DEF Device_Jumper JP 0 30 Y N 1 F N
-F0 "JP" 0 150 50 H V C CNN
-F1 "Device_Jumper" 0 -80 50 H V C CNN
+DEF Device_D_Schottky D 0 40 N N 1 F N
+F0 "D" 0 100 50 H V C CNN
+F1 "Device_D_Schottky" 0 -100 50 H V C CNN
 F2 "" 0 0 50 H I C CNN
 F3 "" 0 0 50 H I C CNN
 $FPLIST
- SolderJumper*
- Jumper*
- TestPoint*2Pads*
- TestPoint*Bridge*
+ TO-???*
+ *_Diode_*
+ *SingleDiode*
+ D_*
 $ENDFPLIST
 DRAW
-A 0 -26 125 1426 373 0 1 0 N -98 50 99 50
-C -100 0 35 0 1 0 N
-C 100 0 35 0 1 0 N
-X 1 1 -300 0 165 R 50 50 0 1 P
-X 2 2 300 0 165 L 50 50 0 1 P
+P 2 0 1 0 50 0 -50 0 N
+P 4 0 1 10 50 50 50 -50 -50 0 50 50 N
+P 6 0 1 10 -75 25 -75 50 -50 50 -50 -50 -25 -50 -25 -25 N
+X K 1 -150 0 100 R 50 50 1 1 P
+X A 2 150 0 100 L 50 50 1 1 P
 ENDDRAW
 ENDDEF
 #
@@ -199,6 +217,23 @@ X A 2 150 0 100 L 50 50 1 1 P
 ENDDRAW
 ENDDEF
 #
+# Device_R
+#
+DEF Device_R R 0 0 N Y 1 F N
+F0 "R" 80 0 50 V V C CNN
+F1 "Device_R" 0 0 50 V V C CNN
+F2 "" -70 0 50 V I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ R_*
+$ENDFPLIST
+DRAW
+S -40 -100 40 100 0 1 10 N
+X ~ 1 0 150 50 D 50 50 1 1 P
+X ~ 2 0 -150 50 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
 # Interface_USB_FT232RL
 #
 DEF Interface_USB_FT232RL U 0 20 Y Y 1 F N
@@ -240,6 +275,31 @@ X DCR 9 800 200 150 L 50 50 1 1 I L
 ENDDRAW
 ENDDEF
 #
+# Jumper_Jumper_3_Open
+#
+DEF Jumper_Jumper_3_Open JP 0 0 Y N 1 F N
+F0 "JP" -100 -100 50 H V C CNN
+F1 "Jumper_Jumper_3_Open" 0 110 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Jumper*
+ TestPoint*3Pads*
+ TestPoint*Bridge*
+$ENDFPLIST
+DRAW
+A -65 -30 89 1282 518 0 1 0 N -120 40 -10 40
+A 65 -30 89 1282 518 0 1 0 N 10 40 120 40
+C -130 0 20 0 0 0 N
+C 0 0 20 0 0 0 N
+C 130 0 20 0 0 0 N
+P 2 0 1 0 0 -20 0 -50 N
+X A 1 -250 0 100 R 50 50 1 1 P
+X C 2 0 -150 100 U 50 50 1 1 I
+X B 3 250 0 100 L 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
 # MCU_Microchip_ATmega_ATmega328P-AU
 #
 DEF MCU_Microchip_ATmega_ATmega328P-AU U 0 20 Y Y 1 F N
@@ -358,4 +418,17 @@ X C 3 200 -100 100 L 50 50 1 1 P
 ENDDRAW
 ENDDEF
 #
+# power_GND
+#
+DEF power_GND #PWR 0 0 Y Y 1 F P
+F0 "#PWR" 0 -250 50 H I C CNN
+F1 "power_GND" 0 -150 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+P 6 0 1 0 0 0 0 -50 50 -50 0 -100 -50 -50 0 -50 N
+X GND 1 0 0 0 D 50 50 1 1 w N
+ENDDRAW
+ENDDEF
+#
 #End Library
diff --git a/schematic/KiCad/TOSR-04.sch b/schematic/KiCad/TOSR-04.sch
index fa941a2..edf95c6 100644
--- a/schematic/KiCad/TOSR-04.sch
+++ b/schematic/KiCad/TOSR-04.sch
@@ -16,56 +16,56 @@ $EndDescr
 $Comp
 L Interface_USB:FT232RL U?
 U 1 1 60F3FC11
-P 2700 3000
-F 0 "U?" H 2700 4181 50  0000 C CNN
-F 1 "FT232RL" H 2700 4090 50  0000 C CNN
-F 2 "Package_SO:SSOP-28_5.3x10.2mm_P0.65mm" H 3800 2100 50  0001 C CNN
-F 3 "https://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT232R.pdf" H 2700 3000 50  0001 C CNN
-	1    2700 3000
+P 2750 3750
+F 0 "U?" H 3150 4750 50  0000 C CNN
+F 1 "FT232RL" H 3150 4650 50  0000 C CNN
+F 2 "Package_SO:SSOP-28_5.3x10.2mm_P0.65mm" H 3850 2850 50  0001 C CNN
+F 3 "https://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT232R.pdf" H 2750 3750 50  0001 C CNN
+	1    2750 3750
 	1    0    0    -1  
 $EndComp
 $Comp
 L Connector:USB_B_Mini J?
 U 1 1 60F4106E
-P 4500 1300
-F 0 "J?" H 4557 1767 50  0000 C CNN
-F 1 "USB_B_Mini" H 4557 1676 50  0000 C CNN
-F 2 "" H 4650 1250 50  0001 C CNN
-F 3 "~" H 4650 1250 50  0001 C CNN
-	1    4500 1300
+P 850 3000
+F 0 "J?" H 907 3467 50  0000 C CNN
+F 1 "USB_B_Mini" H 907 3376 50  0000 C CNN
+F 2 "" H 1000 2950 50  0001 C CNN
+F 3 "~" H 1000 2950 50  0001 C CNN
+	1    850  3000
 	1    0    0    -1  
 $EndComp
 $Comp
 L Regulator_Linear:AMS1117-3.3 U?
 U 1 1 60F41C54
-P 5750 1500
-F 0 "U?" H 5750 1742 50  0000 C CNN
-F 1 "AMS1117-3.3" H 5750 1651 50  0000 C CNN
-F 2 "Package_TO_SOT_SMD:SOT-223-3_TabPin2" H 5750 1700 50  0001 C CNN
-F 3 "http://www.advanced-monolithic.com/pdf/ds1117.pdf" H 5850 1250 50  0001 C CNN
-	1    5750 1500
+P 3250 1700
+F 0 "U?" H 3250 1942 50  0000 C CNN
+F 1 "AMS1117-3.3" H 3250 1851 50  0000 C CNN
+F 2 "Package_TO_SOT_SMD:SOT-223-3_TabPin2" H 3250 1900 50  0001 C CNN
+F 3 "http://www.advanced-monolithic.com/pdf/ds1117.pdf" H 3350 1450 50  0001 C CNN
+	1    3250 1700
 	1    0    0    -1  
 $EndComp
 $Comp
 L MCU_Microchip_ATmega:ATmega328P-AU U?
 U 1 1 60F44623
-P 5750 3750
-F 0 "U?" H 5750 2161 50  0000 C CNN
-F 1 "ATmega328P-AU" H 5750 2070 50  0000 C CNN
-F 2 "Package_QFP:TQFP-32_7x7mm_P0.8mm" H 5750 3750 50  0001 C CIN
-F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/ATmega328_P%20AVR%20MCU%20with%20picoPower%20Technology%20Data%20Sheet%2040001984A.pdf" H 5750 3750 50  0001 C CNN
-	1    5750 3750
+P 5600 3400
+F 0 "U?" H 6100 1850 50  0000 C CNN
+F 1 "ATmega328P-AU" H 6150 1950 50  0000 C CNN
+F 2 "Package_QFP:TQFP-32_7x7mm_P0.8mm" H 5600 3400 50  0001 C CIN
+F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/ATmega328_P%20AVR%20MCU%20with%20picoPower%20Technology%20Data%20Sheet%2040001984A.pdf" H 5600 3400 50  0001 C CNN
+	1    5600 3400
 	1    0    0    -1  
 $EndComp
 $Comp
 L Switch:SW_SPDT SW?
 U 1 1 60F47734
-P 7950 2950
-F 0 "SW?" H 7950 3235 50  0000 C CNN
-F 1 "SW_SPDT" H 7950 3144 50  0000 C CNN
-F 2 "" H 7950 2950 50  0001 C CNN
-F 3 "~" H 7950 2950 50  0001 C CNN
-	1    7950 2950
+P 4200 3000
+F 0 "SW?" H 4200 3285 50  0000 C CNN
+F 1 "SW_SPDT" H 4200 3194 50  0000 C CNN
+F 2 "" H 4200 3000 50  0001 C CNN
+F 3 "~" H 4200 3000 50  0001 C CNN
+	1    4200 3000
 	1    0    0    -1  
 $EndComp
 $Comp
@@ -137,101 +137,101 @@ $EndComp
 $Comp
 L Device:Crystal_GND24_Small Y?
 U 1 1 60F4C6F7
-P 6850 1650
-F 0 "Y?" H 6994 1696 50  0000 L CNN
-F 1 "Crystal_GND24_Small" H 6994 1605 50  0000 L CNN
-F 2 "" H 6850 1650 50  0001 C CNN
-F 3 "~" H 6850 1650 50  0001 C CNN
-	1    6850 1650
-	1    0    0    -1  
+P 6650 2850
+F 0 "Y?" H 6794 2896 50  0000 L CNN
+F 1 "Crystal_GND24_Small" V 6600 3000 50  0000 L CNN
+F 2 "" H 6650 2850 50  0001 C CNN
+F 3 "~" H 6650 2850 50  0001 C CNN
+	1    6650 2850
+	0    1    1    0   
 $EndComp
 $Comp
 L Relay:G5LE-1 K?
 U 1 1 60F4DEBD
-P 2250 4950
-F 0 "K?" H 2680 4996 50  0000 L CNN
-F 1 "G5LE-1" H 2680 4905 50  0000 L CNN
-F 2 "Relay_THT:Relay_SPDT_Omron-G5LE-1" H 2700 4900 50  0001 L CNN
-F 3 "http://www.omron.com/ecb/products/pdf/en-g5le.pdf" H 2250 4950 50  0001 C CNN
-	1    2250 4950
+P 8500 5250
+F 0 "K?" H 8930 5296 50  0000 L CNN
+F 1 "G5LE-1" H 8930 5205 50  0000 L CNN
+F 2 "Relay_THT:Relay_SPDT_Omron-G5LE-1" H 8950 5200 50  0001 L CNN
+F 3 "http://www.omron.com/ecb/products/pdf/en-g5le.pdf" H 8500 5250 50  0001 C CNN
+	1    8500 5250
 	1    0    0    -1  
 $EndComp
 $Comp
 L Relay:G5LE-1 K?
 U 1 1 60F503FF
-P 3550 4950
-F 0 "K?" H 3980 4996 50  0000 L CNN
-F 1 "G5LE-1" H 3980 4905 50  0000 L CNN
-F 2 "Relay_THT:Relay_SPDT_Omron-G5LE-1" H 4000 4900 50  0001 L CNN
-F 3 "http://www.omron.com/ecb/products/pdf/en-g5le.pdf" H 3550 4950 50  0001 C CNN
-	1    3550 4950
+P 9800 5250
+F 0 "K?" H 10230 5296 50  0000 L CNN
+F 1 "G5LE-1" H 10230 5205 50  0000 L CNN
+F 2 "Relay_THT:Relay_SPDT_Omron-G5LE-1" H 10250 5200 50  0001 L CNN
+F 3 "http://www.omron.com/ecb/products/pdf/en-g5le.pdf" H 9800 5250 50  0001 C CNN
+	1    9800 5250
 	1    0    0    -1  
 $EndComp
 $Comp
 L Relay:G5LE-1 K?
 U 1 1 60F50FE3
-P 3550 5650
-F 0 "K?" H 3980 5696 50  0000 L CNN
-F 1 "G5LE-1" H 3980 5605 50  0000 L CNN
-F 2 "Relay_THT:Relay_SPDT_Omron-G5LE-1" H 4000 5600 50  0001 L CNN
-F 3 "http://www.omron.com/ecb/products/pdf/en-g5le.pdf" H 3550 5650 50  0001 C CNN
-	1    3550 5650
+P 9800 5950
+F 0 "K?" H 10230 5996 50  0000 L CNN
+F 1 "G5LE-1" H 10230 5905 50  0000 L CNN
+F 2 "Relay_THT:Relay_SPDT_Omron-G5LE-1" H 10250 5900 50  0001 L CNN
+F 3 "http://www.omron.com/ecb/products/pdf/en-g5le.pdf" H 9800 5950 50  0001 C CNN
+	1    9800 5950
 	1    0    0    -1  
 $EndComp
 $Comp
 L Relay:G5LE-1 K?
 U 1 1 60F51715
-P 2400 5650
-F 0 "K?" H 2830 5696 50  0000 L CNN
-F 1 "G5LE-1" H 2830 5605 50  0000 L CNN
-F 2 "Relay_THT:Relay_SPDT_Omron-G5LE-1" H 2850 5600 50  0001 L CNN
-F 3 "http://www.omron.com/ecb/products/pdf/en-g5le.pdf" H 2400 5650 50  0001 C CNN
-	1    2400 5650
+P 8650 5950
+F 0 "K?" H 9080 5996 50  0000 L CNN
+F 1 "G5LE-1" H 9080 5905 50  0000 L CNN
+F 2 "Relay_THT:Relay_SPDT_Omron-G5LE-1" H 9100 5900 50  0001 L CNN
+F 3 "http://www.omron.com/ecb/products/pdf/en-g5le.pdf" H 8650 5950 50  0001 C CNN
+	1    8650 5950
 	1    0    0    -1  
 $EndComp
 $Comp
 L Device:LED D?
 U 1 1 60F520C0
-P 7100 2500
-F 0 "D?" H 7093 2717 50  0000 C CNN
-F 1 "LED" H 7093 2626 50  0000 C CNN
-F 2 "" H 7100 2500 50  0001 C CNN
-F 3 "~" H 7100 2500 50  0001 C CNN
-	1    7100 2500
-	1    0    0    -1  
+P 3850 1700
+F 0 "D?" H 3843 1917 50  0000 C CNN
+F 1 "PWR_LED" H 3843 1826 50  0000 C CNN
+F 2 "" H 3850 1700 50  0001 C CNN
+F 3 "~" H 3850 1700 50  0001 C CNN
+	1    3850 1700
+	-1   0    0    1   
 $EndComp
 $Comp
 L Device:LED D?
 U 1 1 60F52F4F
-P 7550 2450
-F 0 "D?" H 7543 2667 50  0000 C CNN
-F 1 "LED" H 7543 2576 50  0000 C CNN
-F 2 "" H 7550 2450 50  0001 C CNN
-F 3 "~" H 7550 2450 50  0001 C CNN
-	1    7550 2450
-	1    0    0    -1  
+P 1450 2600
+F 0 "D?" H 1443 2817 50  0000 C CNN
+F 1 "TX_LED" H 1443 2726 50  0000 C CNN
+F 2 "" H 1450 2600 50  0001 C CNN
+F 3 "~" H 1450 2600 50  0001 C CNN
+	1    1450 2600
+	-1   0    0    1   
 $EndComp
 $Comp
-L Device:LED D?
+L Device:LED RX_LED
 U 1 1 60F53281
-P 8150 2500
-F 0 "D?" H 8143 2717 50  0000 C CNN
-F 1 "LED" H 8143 2626 50  0000 C CNN
-F 2 "" H 8150 2500 50  0001 C CNN
-F 3 "~" H 8150 2500 50  0001 C CNN
-	1    8150 2500
-	1    0    0    -1  
+P 1450 2250
+F 0 "RX_LED" H 1443 2467 50  0000 C CNN
+F 1 "D?" H 1450 2400 50  0000 C CNN
+F 2 "" H 1450 2250 50  0001 C CNN
+F 3 "~" H 1450 2250 50  0001 C CNN
+	1    1450 2250
+	-1   0    0    1   
 $EndComp
 $Comp
 L Device:LED D?
 U 1 1 60F53642
-P 8600 2600
-F 0 "D?" H 8593 2817 50  0000 C CNN
-F 1 "LED" H 8593 2726 50  0000 C CNN
-F 2 "" H 8600 2600 50  0001 C CNN
-F 3 "~" H 8600 2600 50  0001 C CNN
-	1    8600 2600
-	1    0    0    -1  
+P 3000 1050
+F 0 "D?" H 2993 1267 50  0000 C CNN
+F 1 "JACK_PWR_LED" H 2993 1176 50  0000 C CNN
+F 2 "" H 3000 1050 50  0001 C CNN
+F 3 "~" H 3000 1050 50  0001 C CNN
+	1    3000 1050
+	-1   0    0    1   
 $EndComp
 $Comp
 L Device:LED D?
@@ -291,23 +291,420 @@ $EndComp
 $Comp
 L Connector:Barrel_Jack J?
 U 1 1 60F54E0F
-P 7250 1000
-F 0 "J?" H 7307 1325 50  0000 C CNN
-F 1 "Barrel_Jack" H 7307 1234 50  0000 C CNN
-F 2 "" H 7300 960 50  0001 C CNN
-F 3 "~" H 7300 960 50  0001 C CNN
-	1    7250 1000
+P 850 1550
+F 0 "J?" H 907 1875 50  0000 C CNN
+F 1 "Barrel_Jack" H 907 1784 50  0000 C CNN
+F 2 "" H 900 1510 50  0001 C CNN
+F 3 "~" H 900 1510 50  0001 C CNN
+	1    850  1550
 	1    0    0    -1  
 $EndComp
+Wire Wire Line
+	1150 3100 1550 3100
+Wire Wire Line
+	1150 3000 1650 3000
+Wire Wire Line
+	1950 4450 1950 4750
+Wire Wire Line
+	1950 4750 2550 4750
+Connection ~ 1950 4750
+Wire Wire Line
+	750  3400 850  3400
+Connection ~ 850  3400
+$Comp
+L power:GND #PWR?
+U 1 1 60F6B439
+P 3250 2100
+F 0 "#PWR?" H 3250 1850 50  0001 C CNN
+F 1 "GND" H 3255 1927 50  0000 C CNN
+F 2 "" H 3250 2100 50  0001 C CNN
+F 3 "" H 3250 2100 50  0001 C CNN
+	1    3250 2100
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	3250 2000 3250 2100
+$Comp
+L power:GND #PWR?
+U 1 1 60F6CA9E
+P 1950 4850
+F 0 "#PWR?" H 1950 4600 50  0001 C CNN
+F 1 "GND" H 1955 4677 50  0000 C CNN
+F 2 "" H 1950 4850 50  0001 C CNN
+F 3 "" H 1950 4850 50  0001 C CNN
+	1    1950 4850
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	1950 4750 1950 4850
+Wire Wire Line
+	1150 2100 1150 2800
+Wire Wire Line
+	3550 1700 3650 1700
+$Comp
+L Device:R R?
+U 1 1 60F74641
+P 4100 1850
+F 0 "R?" H 4170 1896 50  0000 L CNN
+F 1 "10k" H 4170 1805 50  0000 L CNN
+F 2 "" V 4030 1850 50  0001 C CNN
+F 3 "~" H 4100 1850 50  0001 C CNN
+	1    4100 1850
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	4100 2000 3250 2000
+Connection ~ 3250 2000
+Wire Wire Line
+	4100 1700 4000 1700
+Wire Wire Line
+	1550 3100 1550 3450
+Wire Wire Line
+	1550 3450 1950 3450
+Wire Wire Line
+	1650 3000 1650 3350
+Wire Wire Line
+	1650 3350 1950 3350
+Wire Wire Line
+	850  3400 850  4750
+Wire Wire Line
+	850  4750 1950 4750
+$Comp
+L Jumper:Jumper_3_Open JP?
+U 1 1 60F7C83F
+P 2600 1700
+F 0 "JP?" V 2646 1787 50  0000 L CNN
+F 1 "PWR_SEL" V 2555 1787 50  0000 L CNN
+F 2 "" H 2600 1700 50  0001 C CNN
+F 3 "~" H 2600 1700 50  0001 C CNN
+	1    2600 1700
+	0    -1   -1   0   
+$EndComp
+Wire Wire Line
+	2750 1700 2850 1700
+Wire Wire Line
+	2600 2100 2600 1950
+Wire Wire Line
+	1150 2100 2600 2100
+$Comp
+L power:GND #PWR?
+U 1 1 60F92DD0
+P 1250 1750
+F 0 "#PWR?" H 1250 1500 50  0001 C CNN
+F 1 "GND" H 1255 1577 50  0000 C CNN
+F 2 "" H 1250 1750 50  0001 C CNN
+F 3 "" H 1250 1750 50  0001 C CNN
+	1    1250 1750
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	1150 1650 1250 1650
+Wire Wire Line
+	1250 1650 1250 1750
+$Comp
+L Device:D_Schottky D?
+U 1 1 60F95283
+P 1450 1450
+F 0 "D?" H 1500 1650 50  0000 C CNN
+F 1 "D_Schottky_SS14" H 1250 1550 50  0000 C CNN
+F 2 "" H 1450 1450 50  0001 C CNN
+F 3 "~" H 1450 1450 50  0001 C CNN
+	1    1450 1450
+	-1   0    0    1   
+$EndComp
+Wire Wire Line
+	1150 1450 1300 1450
+Wire Wire Line
+	1600 1450 2600 1450
+Wire Wire Line
+	1300 2250 1300 2600
+$Comp
+L Device:R R?
+U 1 1 60F9F69B
+P 1750 2250
+F 0 "R?" V 1650 2250 50  0000 C CNN
+F 1 "10k" V 1750 2250 50  0000 C CNN
+F 2 "" V 1680 2250 50  0001 C CNN
+F 3 "~" H 1750 2250 50  0001 C CNN
+	1    1750 2250
+	0    1    1    0   
+$EndComp
 $Comp
-L Device:Jumper JP?
-U 1 1 60F568EC
-P 10000 1300
-F 0 "JP?" H 10000 1564 50  0000 C CNN
-F 1 "Jumper" H 10000 1473 50  0000 C CNN
-F 2 "" H 10000 1300 50  0001 C CNN
-F 3 "~" H 10000 1300 50  0001 C CNN
-	1    10000 1300
+L Device:R R?
+U 1 1 60FA06AE
+P 1750 2450
+F 0 "R?" V 1650 2450 50  0000 C CNN
+F 1 "10k" V 1750 2450 50  0000 C CNN
+F 2 "" V 1680 2450 50  0001 C CNN
+F 3 "~" H 1750 2450 50  0001 C CNN
+	1    1750 2450
+	0    1    1    0   
+$EndComp
+Wire Wire Line
+	1700 3050 1950 3050
+Text GLabel 3650 4150 2    50   Input ~ 0
+FTDI_RX_LED
+Text GLabel 1950 2250 2    50   Input ~ 0
+FTDI_RX_LED
+Wire Wire Line
+	1700 3050 1700 2900
+Wire Wire Line
+	1700 2900 1300 2900
+Wire Wire Line
+	1300 2900 1300 2600
+Connection ~ 1300 2600
+Text GLabel 1950 2450 2    50   Input ~ 0
+FTDI_TX_LED
+Wire Wire Line
+	1900 2250 1950 2250
+Wire Wire Line
+	3650 4150 3550 4150
+Text GLabel 3650 4050 2    50   Input ~ 0
+FTDI_TX_LED
+Wire Wire Line
+	3650 4050 3550 4050
+NoConn ~ 3550 4350
+NoConn ~ 3550 4250
+NoConn ~ 3550 4450
+NoConn ~ 3550 3250
+NoConn ~ 3550 3650
+NoConn ~ 3550 3550
+Wire Wire Line
+	2950 4750 2850 4750
+Wire Wire Line
+	2850 4750 2750 4750
+Connection ~ 2850 4750
+Wire Wire Line
+	2750 4750 2550 4750
+Connection ~ 2750 4750
+Connection ~ 2550 4750
+NoConn ~ 3550 3350
+Wire Wire Line
+	2600 2100 2850 2100
+Wire Wire Line
+	2850 2100 2850 2750
+Connection ~ 2600 2100
+$Comp
+L Device:C C?
+U 1 1 60FAF55E
+P 1850 2700
+F 0 "C?" V 1800 2800 50  0000 C CNN
+F 1 "100nF" V 2000 2700 50  0000 C CNN
+F 2 "" H 1888 2550 50  0001 C CNN
+F 3 "~" H 1850 2700 50  0001 C CNN
+	1    1850 2700
+	0    1    1    0   
+$EndComp
+$Comp
+L power:GND #PWR?
+U 1 1 60FB2412
+P 2000 2750
+F 0 "#PWR?" H 2000 2500 50  0001 C CNN
+F 1 "GND" H 2005 2577 50  0000 C CNN
+F 2 "" H 2000 2750 50  0001 C CNN
+F 3 "" H 2000 2750 50  0001 C CNN
+	1    2000 2750
 	1    0    0    -1  
 $EndComp
+Connection ~ 1700 2900
+Wire Wire Line
+	1950 2450 1900 2450
+Wire Wire Line
+	1600 2450 1600 2600
+Wire Wire Line
+	1700 2550 2650 2550
+Wire Wire Line
+	2650 2550 2650 2750
+Wire Wire Line
+	1700 2550 1700 2700
+Connection ~ 1700 2700
+Wire Wire Line
+	1700 2700 1700 2900
+Wire Wire Line
+	2000 2700 2000 2750
+NoConn ~ 3550 3750
+$Comp
+L Device:C C?
+U 1 1 60FC2425
+P 6450 3700
+F 0 "C?" V 6198 3700 50  0000 C CNN
+F 1 "C" V 6289 3700 50  0000 C CNN
+F 2 "" H 6488 3550 50  0001 C CNN
+F 3 "~" H 6450 3700 50  0001 C CNN
+	1    6450 3700
+	0    1    1    0   
+$EndComp
+Wire Wire Line
+	6300 3700 6200 3700
+Text GLabel 6700 3700 2    50   Input ~ 0
+FTDI_DTR
+Wire Wire Line
+	6700 3700 6600 3700
+Text GLabel 3650 3450 2    50   Input ~ 0
+FTDI_DTR
+Wire Wire Line
+	3650 3450 3550 3450
+$Comp
+L power:GND #PWR?
+U 1 1 60FCC2A4
+P 5600 4950
+F 0 "#PWR?" H 5600 4700 50  0001 C CNN
+F 1 "GND" H 5605 4777 50  0000 C CNN
+F 2 "" H 5600 4950 50  0001 C CNN
+F 3 "" H 5600 4950 50  0001 C CNN
+	1    5600 4950
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	5600 4950 5600 4900
+Wire Wire Line
+	3650 1700 3650 1350
+Wire Wire Line
+	3650 1350 5600 1350
+Wire Wire Line
+	5600 1350 5600 1800
+Connection ~ 3650 1700
+Wire Wire Line
+	3650 1700 3700 1700
+Wire Wire Line
+	5700 1900 5700 1800
+Wire Wire Line
+	5700 1800 5600 1800
+Connection ~ 5600 1800
+Wire Wire Line
+	5600 1800 5600 1900
+$Comp
+L Device:C C?
+U 1 1 60FD0C22
+P 5850 1800
+F 0 "C?" V 5598 1800 50  0000 C CNN
+F 1 "C" V 5689 1800 50  0000 C CNN
+F 2 "" H 5888 1650 50  0001 C CNN
+F 3 "~" H 5850 1800 50  0001 C CNN
+	1    5850 1800
+	0    1    1    0   
+$EndComp
+Connection ~ 5700 1800
+$Comp
+L power:GND #PWR?
+U 1 1 60FD17CB
+P 6200 1800
+F 0 "#PWR?" H 6200 1550 50  0001 C CNN
+F 1 "GND" H 6205 1627 50  0000 C CNN
+F 2 "" H 6200 1800 50  0001 C CNN
+F 3 "" H 6200 1800 50  0001 C CNN
+	1    6200 1800
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	6200 1800 6000 1800
+$Comp
+L Device:C C?
+U 1 1 60FD308A
+P 4750 2200
+F 0 "C?" V 4498 2200 50  0000 C CNN
+F 1 "C" V 4589 2200 50  0000 C CNN
+F 2 "" H 4788 2050 50  0001 C CNN
+F 3 "~" H 4750 2200 50  0001 C CNN
+	1    4750 2200
+	0    1    1    0   
+$EndComp
+Wire Wire Line
+	4900 2200 5000 2200
+$Comp
+L power:GND #PWR?
+U 1 1 60FD4968
+P 4500 2250
+F 0 "#PWR?" H 4500 2000 50  0001 C CNN
+F 1 "GND" H 4505 2077 50  0000 C CNN
+F 2 "" H 4500 2250 50  0001 C CNN
+F 3 "" H 4500 2250 50  0001 C CNN
+	1    4500 2250
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	4600 2200 4500 2200
+Wire Wire Line
+	4500 2200 4500 2250
+Wire Wire Line
+	2850 1050 2850 1700
+Connection ~ 2850 1700
+Wire Wire Line
+	2850 1700 2950 1700
+$Comp
+L Device:R R?
+U 1 1 60FD8D8F
+P 3300 1050
+F 0 "R?" V 3093 1050 50  0000 C CNN
+F 1 "10k" V 3184 1050 50  0000 C CNN
+F 2 "" V 3230 1050 50  0001 C CNN
+F 3 "~" H 3300 1050 50  0001 C CNN
+	1    3300 1050
+	0    1    1    0   
+$EndComp
+$Comp
+L power:GND #PWR?
+U 1 1 60FD94B2
+P 3550 1150
+F 0 "#PWR?" H 3550 900 50  0001 C CNN
+F 1 "GND" H 3555 977 50  0000 C CNN
+F 2 "" H 3550 1150 50  0001 C CNN
+F 3 "" H 3550 1150 50  0001 C CNN
+	1    3550 1150
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	3450 1050 3550 1050
+Wire Wire Line
+	3550 1050 3550 1150
+Text GLabel 3100 2450 2    50   Input ~ 0
+SYS_VCC
+Wire Wire Line
+	3100 2450 2950 2450
+Wire Wire Line
+	2950 2450 2950 2000
+Wire Wire Line
+	2950 2000 2850 2000
+Wire Wire Line
+	2850 2000 2850 1700
+$Comp
+L power:GND #PWR?
+U 1 1 60FE730A
+P 6900 2850
+F 0 "#PWR?" H 6900 2600 50  0001 C CNN
+F 1 "GND" H 6905 2677 50  0000 C CNN
+F 2 "" H 6900 2850 50  0001 C CNN
+F 3 "" H 6900 2850 50  0001 C CNN
+	1    6900 2850
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	6750 2850 6900 2850
+$Comp
+L power:GND #PWR?
+U 1 1 60FE935A
+P 6400 2850
+F 0 "#PWR?" H 6400 2600 50  0001 C CNN
+F 1 "GND" H 6405 2677 50  0000 C CNN
+F 2 "" H 6400 2850 50  0001 C CNN
+F 3 "" H 6400 2850 50  0001 C CNN
+	1    6400 2850
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	6400 2850 6550 2850
+Wire Wire Line
+	6650 2750 6300 2750
+Wire Wire Line
+	6300 2750 6300 2800
+Wire Wire Line
+	6300 2800 6200 2800
+Wire Wire Line
+	6200 2900 6300 2900
+Wire Wire Line
+	6300 2900 6300 3100
+Wire Wire Line
+	6300 3100 6650 3100
+Wire Wire Line
+	6650 3100 6650 2950
 $EndSCHEMATC
diff --git a/schematic/KiCad/TOSR-04.sch-bak b/schematic/KiCad/TOSR-04.sch-bak
index fff8c68..fa941a2 100644
--- a/schematic/KiCad/TOSR-04.sch-bak
+++ b/schematic/KiCad/TOSR-04.sch-bak
@@ -1,4 +1,313 @@
-EESchema Schematic File Version 2
-EELAYER 25 0
+EESchema Schematic File Version 4
+EELAYER 30 0
 EELAYER END
+$Descr A4 11693 8268
+encoding utf-8
+Sheet 1 1
+Title ""
+Date ""
+Rev ""
+Comp ""
+Comment1 ""
+Comment2 ""
+Comment3 ""
+Comment4 ""
+$EndDescr
+$Comp
+L Interface_USB:FT232RL U?
+U 1 1 60F3FC11
+P 2700 3000
+F 0 "U?" H 2700 4181 50  0000 C CNN
+F 1 "FT232RL" H 2700 4090 50  0000 C CNN
+F 2 "Package_SO:SSOP-28_5.3x10.2mm_P0.65mm" H 3800 2100 50  0001 C CNN
+F 3 "https://www.ftdichip.com/Support/Documents/DataSheets/ICs/DS_FT232R.pdf" H 2700 3000 50  0001 C CNN
+	1    2700 3000
+	1    0    0    -1  
+$EndComp
+$Comp
+L Connector:USB_B_Mini J?
+U 1 1 60F4106E
+P 4500 1300
+F 0 "J?" H 4557 1767 50  0000 C CNN
+F 1 "USB_B_Mini" H 4557 1676 50  0000 C CNN
+F 2 "" H 4650 1250 50  0001 C CNN
+F 3 "~" H 4650 1250 50  0001 C CNN
+	1    4500 1300
+	1    0    0    -1  
+$EndComp
+$Comp
+L Regulator_Linear:AMS1117-3.3 U?
+U 1 1 60F41C54
+P 5750 1500
+F 0 "U?" H 5750 1742 50  0000 C CNN
+F 1 "AMS1117-3.3" H 5750 1651 50  0000 C CNN
+F 2 "Package_TO_SOT_SMD:SOT-223-3_TabPin2" H 5750 1700 50  0001 C CNN
+F 3 "http://www.advanced-monolithic.com/pdf/ds1117.pdf" H 5850 1250 50  0001 C CNN
+	1    5750 1500
+	1    0    0    -1  
+$EndComp
+$Comp
+L MCU_Microchip_ATmega:ATmega328P-AU U?
+U 1 1 60F44623
+P 5750 3750
+F 0 "U?" H 5750 2161 50  0000 C CNN
+F 1 "ATmega328P-AU" H 5750 2070 50  0000 C CNN
+F 2 "Package_QFP:TQFP-32_7x7mm_P0.8mm" H 5750 3750 50  0001 C CIN
+F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/ATmega328_P%20AVR%20MCU%20with%20picoPower%20Technology%20Data%20Sheet%2040001984A.pdf" H 5750 3750 50  0001 C CNN
+	1    5750 3750
+	1    0    0    -1  
+$EndComp
+$Comp
+L Switch:SW_SPDT SW?
+U 1 1 60F47734
+P 7950 2950
+F 0 "SW?" H 7950 3235 50  0000 C CNN
+F 1 "SW_SPDT" H 7950 3144 50  0000 C CNN
+F 2 "" H 7950 2950 50  0001 C CNN
+F 3 "~" H 7950 2950 50  0001 C CNN
+	1    7950 2950
+	1    0    0    -1  
+$EndComp
+$Comp
+L Connector:Conn_01x10_Female J?
+U 1 1 60F485B4
+P 7750 4000
+F 0 "J?" H 7778 3976 50  0000 L CNN
+F 1 "Conn_01x10_Female" H 7778 3885 50  0000 L CNN
+F 2 "" H 7750 4000 50  0001 C CNN
+F 3 "~" H 7750 4000 50  0001 C CNN
+	1    7750 4000
+	1    0    0    -1  
+$EndComp
+$Comp
+L Connector:Conn_01x10_Female J?
+U 1 1 60F491A6
+P 9200 3900
+F 0 "J?" H 9228 3876 50  0000 L CNN
+F 1 "Conn_01x10_Female" H 9228 3785 50  0000 L CNN
+F 2 "" H 9200 3900 50  0001 C CNN
+F 3 "~" H 9200 3900 50  0001 C CNN
+	1    9200 3900
+	1    0    0    -1  
+$EndComp
+$Comp
+L Connector:Screw_Terminal_01x03 J?
+U 1 1 60F4A6B4
+P 8150 1450
+F 0 "J?" H 8230 1492 50  0000 L CNN
+F 1 "Screw_Terminal_01x03" H 8230 1401 50  0000 L CNN
+F 2 "" H 8150 1450 50  0001 C CNN
+F 3 "~" H 8150 1450 50  0001 C CNN
+	1    8150 1450
+	1    0    0    -1  
+$EndComp
+$Comp
+L Connector:Screw_Terminal_01x03 J?
+U 1 1 60F4B402
+P 9250 1700
+F 0 "J?" H 9330 1742 50  0000 L CNN
+F 1 "Screw_Terminal_01x03" H 9330 1651 50  0000 L CNN
+F 2 "" H 9250 1700 50  0001 C CNN
+F 3 "~" H 9250 1700 50  0001 C CNN
+	1    9250 1700
+	1    0    0    -1  
+$EndComp
+$Comp
+L Connector:Screw_Terminal_01x03 J?
+U 1 1 60F4B8CF
+P 8600 2000
+F 0 "J?" H 8680 2042 50  0000 L CNN
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+F 2 "" H 8600 2000 50  0001 C CNN
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+	1    8600 2000
+	1    0    0    -1  
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+$Comp
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+F 3 "~" H 9150 2200 50  0001 C CNN
+	1    9150 2200
+	1    0    0    -1  
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+$Comp
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+	1    6850 1650
+	1    0    0    -1  
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+$Comp
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+	1    2250 4950
+	1    0    0    -1  
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+	1    3550 4950
+	1    0    0    -1  
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+	1    3550 5650
+	1    0    0    -1  
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+F 0 "K?" H 2830 5696 50  0000 L CNN
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+	1    2400 5650
+	1    0    0    -1  
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+$Comp
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+	1    7100 2500
+	1    0    0    -1  
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+$Comp
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+P 7550 2450
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+F 2 "" H 7550 2450 50  0001 C CNN
+F 3 "~" H 7550 2450 50  0001 C CNN
+	1    7550 2450
+	1    0    0    -1  
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+$Comp
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+F 3 "~" H 8150 2500 50  0001 C CNN
+	1    8150 2500
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:LED D?
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+P 8600 2600
+F 0 "D?" H 8593 2817 50  0000 C CNN
+F 1 "LED" H 8593 2726 50  0000 C CNN
+F 2 "" H 8600 2600 50  0001 C CNN
+F 3 "~" H 8600 2600 50  0001 C CNN
+	1    8600 2600
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:LED D?
+U 1 1 60F53998
+P 9350 2900
+F 0 "D?" H 9343 3117 50  0000 C CNN
+F 1 "LED" H 9343 3026 50  0000 C CNN
+F 2 "" H 9350 2900 50  0001 C CNN
+F 3 "~" H 9350 2900 50  0001 C CNN
+	1    9350 2900
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:LED D?
+U 1 1 60F540B4
+P 10000 3050
+F 0 "D?" H 9993 3267 50  0000 C CNN
+F 1 "LED" H 9993 3176 50  0000 C CNN
+F 2 "" H 10000 3050 50  0001 C CNN
+F 3 "~" H 10000 3050 50  0001 C CNN
+	1    10000 3050
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:LED D?
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+P 10000 3250
+F 0 "D?" H 9993 3467 50  0000 C CNN
+F 1 "LED" H 9993 3376 50  0000 C CNN
+F 2 "" H 10000 3250 50  0001 C CNN
+F 3 "~" H 10000 3250 50  0001 C CNN
+	1    10000 3250
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:LED D?
+U 1 1 60F545BF
+P 10000 3450
+F 0 "D?" H 9993 3667 50  0000 C CNN
+F 1 "LED" H 9993 3576 50  0000 C CNN
+F 2 "" H 10000 3450 50  0001 C CNN
+F 3 "~" H 10000 3450 50  0001 C CNN
+	1    10000 3450
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:LED D?
+U 1 1 60F547F4
+P 10000 3650
+F 0 "D?" H 9993 3867 50  0000 C CNN
+F 1 "LED" H 9993 3776 50  0000 C CNN
+F 2 "" H 10000 3650 50  0001 C CNN
+F 3 "~" H 10000 3650 50  0001 C CNN
+	1    10000 3650
+	1    0    0    -1  
+$EndComp
+$Comp
+L Connector:Barrel_Jack J?
+U 1 1 60F54E0F
+P 7250 1000
+F 0 "J?" H 7307 1325 50  0000 C CNN
+F 1 "Barrel_Jack" H 7307 1234 50  0000 C CNN
+F 2 "" H 7300 960 50  0001 C CNN
+F 3 "~" H 7300 960 50  0001 C CNN
+	1    7250 1000
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:Jumper JP?
+U 1 1 60F568EC
+P 10000 1300
+F 0 "JP?" H 10000 1564 50  0000 C CNN
+F 1 "Jumper" H 10000 1473 50  0000 C CNN
+F 2 "" H 10000 1300 50  0001 C CNN
+F 3 "~" H 10000 1300 50  0001 C CNN
+	1    10000 1300
+	1    0    0    -1  
+$EndComp
 $EndSCHEMATC