Change ext seq transistor, add vias

1 files changed, 247 insertions, 110 deletions

diff --git a/kicad/power.sch b/kicad/power.sch
index da35a4a..ecda19c 100644
--- a/kicad/power.sch
+++ b/kicad/power.sch
@@ -591,88 +591,88 @@ $EndComp
 $Comp
 L Relay:G6K-2 K?
 U 1 1 5EB79B20
-P 9600 2900
+P 1800 6300
 AR Path="/5E2FA006/5EB79B20" Ref="K?"  Part="1" 
 AR Path="/5E2DC494/5EB79B20" Ref="K601"  Part="1" 
-F 0 "K601" V 10275 2900 50  0000 C CNN
-F 1 "G6K-2F-Y-TR DC12" V 10366 2900 50  0000 C CNN
-F 2 "Relay_SMD:Relay_DPDT_Omron_G6K-2F-Y" H 9600 2900 50  0001 L CNN
-F 3 "http://omronfs.omron.com/en_US/ecb/products/pdf/en-g6k.pdf" H 9600 2900 50  0001 C CNN
-F 4 "G6K-2F-Y-TR DC12" H 9600 2900 50  0001 C CNN "MPN"
-F 5 "1" H 9600 2900 50  0001 C CNN "Need_order"
-	1    9600 2900
+F 0 "K601" V 2475 6300 50  0000 C CNN
+F 1 "G6K-2F-Y-TR DC12" V 2566 6300 50  0000 C CNN
+F 2 "Relay_SMD:Relay_DPDT_Omron_G6K-2F-Y" H 1800 6300 50  0001 L CNN
+F 3 "http://omronfs.omron.com/en_US/ecb/products/pdf/en-g6k.pdf" H 1800 6300 50  0001 C CNN
+F 4 "G6K-2F-Y-TR DC12" H 1800 6300 50  0001 C CNN "MPN"
+F 5 "1" H 1800 6300 50  0001 C CNN "Need_order"
+	1    1800 6300
 	0    1    1    0   
 $EndComp
 Wire Wire Line
-	9900 2500 9900 2150
+	2100 5900 2100 5550
 Wire Wire Line
-	9300 2500 9300 2150
+	1500 5900 1500 5550
 $Comp
 L Connector:Screw_Terminal_01x06 J?
 U 1 1 5EB79B42
-P 10550 3200
+P 2750 6600
 AR Path="/5E2FA006/5EB79B42" Ref="J?"  Part="1" 
 AR Path="/5E2DC494/5EB79B42" Ref="J601"  Part="1" 
-F 0 "J601" H 10630 3192 50  0000 L CNN
-F 1 "EXT CTRL" H 10630 3101 50  0000 L CNN
-F 2 "TerminalBlock_Phoenix:TerminalBlock_Phoenix_MPT-0,5-6-2.54_1x06_P2.54mm_Horizontal" H 10550 3200 50  0001 C CNN
-F 3 "~" H 10550 3200 50  0001 C CNN
-F 4 "0" H 10550 3200 50  0001 C CNN "Need_order"
-	1    10550 3200
+F 0 "J601" H 2830 6592 50  0000 L CNN
+F 1 "SEQ SWITCH" H 2830 6501 50  0000 L CNN
+F 2 "TerminalBlock_Phoenix:TerminalBlock_Phoenix_MPT-0,5-6-2.54_1x06_P2.54mm_Horizontal" H 2750 6600 50  0001 C CNN
+F 3 "~" H 2750 6600 50  0001 C CNN
+F 4 "0" H 2750 6600 50  0001 C CNN "Need_order"
+	1    2750 6600
 	1    0    0    -1  
 $EndComp
 $Comp
 L power:GND #PWR?
 U 1 1 5EB79B4E
-P 10350 3500
+P 2550 6900
 AR Path="/5E2FA006/5EB79B4E" Ref="#PWR?"  Part="1" 
 AR Path="/5E2DC494/5EB79B4E" Ref="#PWR0614"  Part="1" 
-F 0 "#PWR0614" H 10350 3250 50  0001 C CNN
-F 1 "GND" H 10355 3327 50  0000 C CNN
-F 2 "" H 10350 3500 50  0001 C CNN
-F 3 "" H 10350 3500 50  0001 C CNN
-	1    10350 3500
+F 0 "#PWR0614" H 2550 6650 50  0001 C CNN
+F 1 "GND" H 2555 6727 50  0000 C CNN
+F 2 "" H 2550 6900 50  0001 C CNN
+F 3 "" H 2550 6900 50  0001 C CNN
+	1    2550 6900
 	1    0    0    -1  
 $EndComp
 Wire Wire Line
-	9900 3200 10100 3200
+	2100 6600 2300 6600
 $Comp
 L power:+12V #PWR?
 U 1 1 5EB79B58
-P 10350 3000
+P 2550 6400
 AR Path="/5EB79B58" Ref="#PWR?"  Part="1" 
 AR Path="/5E2FA006/5EB79B58" Ref="#PWR?"  Part="1" 
 AR Path="/5E2DC494/5EB79B58" Ref="#PWR0613"  Part="1" 
-F 0 "#PWR0613" H 10350 2850 50  0001 C CNN
-F 1 "+12V" H 10365 3173 50  0000 C CNN
-F 2 "" H 10350 3000 50  0001 C CNN
-F 3 "" H 10350 3000 50  0001 C CNN
-	1    10350 3000
+F 0 "#PWR0613" H 2550 6250 50  0001 C CNN
+F 1 "+12V" H 2565 6573 50  0000 C CNN
+F 2 "" H 2550 6400 50  0001 C CNN
+F 3 "" H 2550 6400 50  0001 C CNN
+	1    2550 6400
 	1    0    0    -1  
 $EndComp
 $Comp
 L Diode:1N4148W D?
 U 1 1 5EB79B5E
-P 9600 2150
+P 1800 5550
 AR Path="/5E2FA006/5EB79B5E" Ref="D?"  Part="1" 
 AR Path="/5E2DC494/5EB79B5E" Ref="D608"  Part="1" 
-F 0 "D608" H 9600 1933 50  0000 C CNN
-F 1 "1N4148W" H 9600 2024 50  0000 C CNN
-F 2 "Diode_SMD:D_SOD-123F" H 9600 1975 50  0001 C CNN
-F 3 "https://www.vishay.com/docs/85748/1n4148w.pdf" H 9600 2150 50  0001 C CNN
-F 4 "1N4148W" H 9600 2150 50  0001 C CNN "MPN"
-F 5 "1" H 9600 2150 50  0001 C CNN "Need_order"
-	1    9600 2150
+F 0 "D608" H 1800 5333 50  0000 C CNN
+F 1 "1N4148W" H 1800 5424 50  0000 C CNN
+F 2 "Diode_SMD:D_SOD-123F" H 1800 5375 50  0001 C CNN
+F 3 "https://www.vishay.com/docs/85748/1n4148w.pdf" H 1800 5550 50  0001 C CNN
+F 4 "1N4148W" H 1800 5550 50  0001 C CNN "MPN"
+F 5 "1" H 1800 5550 50  0001 C CNN "Need_order"
+	1    1800 5550
 	-1   0    0    1   
 $EndComp
 Text Label 6500 2450 2    50   ~ 0
 +8V
 Wire Wire Line
-	10100 3200 10100 3300
+	2300 6600 2300 6700
 Wire Wire Line
-	10100 3300 10350 3300
+	2300 6700 2550 6700
 Wire Wire Line
-	9900 3400 10350 3400
+	2100 6800 2550 6800
 Wire Wire Line
 	7900 5600 8000 5600
 Connection ~ 8000 5600
@@ -961,9 +961,9 @@ Wire Wire Line
 Wire Wire Line
 	9200 6400 9350 6400
 Wire Wire Line
-	9900 2150 9750 2150
+	2100 5550 1950 5550
 Wire Wire Line
-	9450 2150 9300 2150
+	1650 5550 1500 5550
 Wire Wire Line
 	9200 5700 9500 5700
 Connection ~ 9200 5700
@@ -1199,7 +1199,7 @@ P 8000 3850
 AR Path="/5E4C0E28/5EC69B4C" Ref="R?"  Part="1" 
 AR Path="/5E2DC494/5EC69B4C" Ref="R605"  Part="1" 
 F 0 "R605" H 8070 3896 50  0000 L CNN
-F 1 "10k" H 8070 3805 50  0000 L CNN
+F 1 "12k" H 8070 3805 50  0000 L CNN
 F 2 "Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder" V 7930 3850 50  0001 C CNN
 F 3 "~" H 8000 3850 50  0001 C CNN
 F 4 "0" H 8000 3850 50  0001 C CNN "Need_order"
@@ -1250,7 +1250,7 @@ P 8000 4150
 AR Path="/5E4C0E28/5EC69B2E" Ref="R?"  Part="1" 
 AR Path="/5E2DC494/5EC69B2E" Ref="R606"  Part="1" 
 F 0 "R606" H 8070 4196 50  0000 L CNN
-F 1 "470" H 8070 4105 50  0000 L CNN
+F 1 "1k" H 8070 4105 50  0000 L CNN
 F 2 "Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder" V 7930 4150 50  0001 C CNN
 F 3 "~" H 8000 4150 50  0001 C CNN
 F 4 "0" H 8000 4150 50  0001 C CNN "Need_order"
@@ -1331,44 +1331,44 @@ Wire Wire Line
 Wire Wire Line
 	7550 4300 7600 4300
 Wire Wire Line
-	9900 3000 10150 3000
+	2100 6400 2350 6400
 Wire Wire Line
-	10150 3000 10150 3200
+	2350 6400 2350 6600
 Wire Wire Line
-	10150 3200 10350 3200
+	2350 6600 2550 6600
 Wire Wire Line
-	9900 2800 10250 2800
+	2100 6200 2450 6200
 Wire Wire Line
-	10250 2800 10250 3100
+	2450 6200 2450 6500
 Wire Wire Line
-	10250 3100 10350 3100
+	2450 6500 2550 6500
 $Comp
 L power:GND #PWR?
 U 1 1 5EE4C1EB
-P 9300 3350
+P 1500 6750
 AR Path="/5E2FA006/5EE4C1EB" Ref="#PWR?"  Part="1" 
 AR Path="/5E2DC494/5EE4C1EB" Ref="#PWR0608"  Part="1" 
-F 0 "#PWR0608" H 9300 3100 50  0001 C CNN
-F 1 "GND" H 9305 3177 50  0000 C CNN
-F 2 "" H 9300 3350 50  0001 C CNN
-F 3 "" H 9300 3350 50  0001 C CNN
-	1    9300 3350
+F 0 "#PWR0608" H 1500 6500 50  0001 C CNN
+F 1 "GND" H 1505 6577 50  0000 C CNN
+F 2 "" H 1500 6750 50  0001 C CNN
+F 3 "" H 1500 6750 50  0001 C CNN
+	1    1500 6750
 	1    0    0    -1  
 $EndComp
 Wire Wire Line
-	9300 3350 9300 3300
-Connection ~ 9300 2500
-Connection ~ 9300 2900
+	1500 6750 1500 6700
+Connection ~ 1500 5900
+Connection ~ 1500 6300
 Wire Wire Line
-	9300 2900 9300 2500
-Connection ~ 9300 3300
+	1500 6300 1500 5900
+Connection ~ 1500 6700
 Wire Wire Line
-	9300 3300 9300 2900
-Connection ~ 9900 2150
+	1500 6700 1500 6300
+Connection ~ 2100 5550
 Wire Wire Line
-	10700 2000 10700 2150
+	2900 5400 2900 5550
 Wire Wire Line
-	9900 2150 10700 2150
+	2100 5550 2900 5550
 Wire Wire Line
 	850  2950 1150 2950
 Connection ~ 850  2950
@@ -1501,90 +1501,227 @@ Connection ~ 9350 6400
 Wire Wire Line
 	9350 6400 10750 6400
 Wire Wire Line
-	9850 1800 9900 1800
+	2050 5200 2100 5200
 $Comp
 L Device:R R?
 U 1 1 5EE6F7A9
-P 10050 1800
+P 2250 5200
 AR Path="/5E4C0E28/5EE6F7A9" Ref="R?"  Part="1" 
 AR Path="/5E2DC494/5EE6F7A9" Ref="R617"  Part="1" 
-F 0 "R617" V 9843 1800 50  0000 C CNN
-F 1 "470" V 9934 1800 50  0000 C CNN
-F 2 "Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder" V 9980 1800 50  0001 C CNN
-F 3 "~" H 10050 1800 50  0001 C CNN
-F 4 "0" H 10050 1800 50  0001 C CNN "Need_order"
-	1    10050 1800
+F 0 "R617" V 2043 5200 50  0000 C CNN
+F 1 "2k2" V 2134 5200 50  0000 C CNN
+F 2 "Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder" V 2180 5200 50  0001 C CNN
+F 3 "~" H 2250 5200 50  0001 C CNN
+F 4 "0" H 2250 5200 50  0001 C CNN "Need_order"
+	1    2250 5200
 	0    1    1    0   
 $EndComp
 $Comp
 L Diode:1N4148W D?
 U 1 1 5EBFA882
-P 9700 1800
+P 1900 5200
 AR Path="/5E3088F9/5EBFA882" Ref="D?"  Part="1" 
 AR Path="/5E4C0E28/5EBFA882" Ref="D?"  Part="1" 
 AR Path="/5E2DC494/5EBFA882" Ref="D611"  Part="1" 
-F 0 "D611" H 9700 2017 50  0000 C CNN
-F 1 "1N4148W" H 9700 1926 50  0000 C CNN
-F 2 "Diode_SMD:D_SOD-123F" H 9700 1625 50  0001 C CNN
-F 3 "https://www.vishay.com/docs/85748/1n4148w.pdf" H 9700 1800 50  0001 C CNN
-F 4 "1N4148W" H 9700 1800 50  0001 C CNN "MPN"
-F 5 "1" H 9700 1800 50  0001 C CNN "Need_order"
-	1    9700 1800
+F 0 "D611" H 1900 5417 50  0000 C CNN
+F 1 "1N4148W" H 1900 5326 50  0000 C CNN
+F 2 "Diode_SMD:D_SOD-123F" H 1900 5025 50  0001 C CNN
+F 3 "https://www.vishay.com/docs/85748/1n4148w.pdf" H 1900 5200 50  0001 C CNN
+F 4 "1N4148W" H 1900 5200 50  0001 C CNN "MPN"
+F 5 "1" H 1900 5200 50  0001 C CNN "Need_order"
+	1    1900 5200
 	1    0    0    -1  
 $EndComp
 Wire Wire Line
-	10700 1600 10700 1500
+	2900 5000 2900 4900
 Wire Wire Line
-	10300 1500 10700 1500
+	2500 4900 2900 4900
 Wire Wire Line
-	10400 1800 10300 1800
+	2600 5200 2500 5200
 Wire Wire Line
-	10200 1800 10300 1800
-Connection ~ 10300 1800
+	2400 5200 2500 5200
+Connection ~ 2500 5200
 $Comp
 L Device:R R?
 U 1 1 5EBEBC07
-P 10300 1650
+P 2500 5050
 AR Path="/5E4C0E28/5EBEBC07" Ref="R?"  Part="1" 
 AR Path="/5E2DC494/5EBEBC07" Ref="R620"  Part="1" 
-F 0 "R620" H 10370 1696 50  0000 L CNN
-F 1 "10k" H 10370 1605 50  0000 L CNN
-F 2 "Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder" V 10230 1650 50  0001 C CNN
-F 3 "~" H 10300 1650 50  0001 C CNN
-F 4 "0" H 10300 1650 50  0001 C CNN "Need_order"
-	1    10300 1650
+F 0 "R620" H 2570 5096 50  0000 L CNN
+F 1 "47k" H 2570 5005 50  0000 L CNN
+F 2 "Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder" V 2430 5050 50  0001 C CNN
+F 3 "~" H 2500 5050 50  0001 C CNN
+F 4 "0" H 2500 5050 50  0001 C CNN "Need_order"
+	1    2500 5050
 	1    0    0    -1  
 $EndComp
 $Comp
 L Transistor_BJT:BC856W Q?
 U 1 1 5EBEB4E7
-P 10600 1800
+P 2800 5200
 AR Path="/5E4C0E28/5EBEB4E7" Ref="Q?"  Part="1" 
 AR Path="/5E2DC494/5EBEB4E7" Ref="Q607"  Part="1" 
-F 0 "Q607" H 10790 1754 50  0000 L CNN
-F 1 "BC856W" H 10790 1845 50  0000 L CNN
-F 2 "Package_TO_SOT_SMD:SOT-323_SC-70" H 10800 1725 50  0001 L CIN
-F 3 "http://www.fairchildsemi.com/ds/BC/BC856.pdf" H 10600 1800 50  0001 L CNN
-F 4 "BC856W" H 10600 1800 50  0001 C CNN "MPN"
-F 5 "0" H 10600 1800 50  0001 C CNN "Need_order"
-	1    10600 1800
+F 0 "Q607" H 2990 5154 50  0000 L CNN
+F 1 "BC856W" H 2990 5245 50  0000 L CNN
+F 2 "Package_TO_SOT_SMD:SOT-323_SC-70" H 3000 5125 50  0001 L CIN
+F 3 "http://www.fairchildsemi.com/ds/BC/BC856.pdf" H 2800 5200 50  0001 L CNN
+F 4 "BC856W" H 2800 5200 50  0001 C CNN "MPN"
+F 5 "0" H 2800 5200 50  0001 C CNN "Need_order"
+	1    2800 5200
 	1    0    0    1   
 $EndComp
-Text HLabel 9550 1800 0    50   Input ~ 0
+Text HLabel 1750 5200 0    50   Input ~ 0
 SWITCH_EXTn
-Connection ~ 10700 1500
+Connection ~ 2900 4900
 $Comp
 L power:+12V #PWR?
 U 1 1 5EB79B2F
-P 10700 1500
+P 2900 4900
 AR Path="/5EB79B2F" Ref="#PWR?"  Part="1" 
 AR Path="/5E2FA006/5EB79B2F" Ref="#PWR?"  Part="1" 
 AR Path="/5E2DC494/5EB79B2F" Ref="#PWR0615"  Part="1" 
-F 0 "#PWR0615" H 10700 1350 50  0001 C CNN
-F 1 "+12V" H 10715 1673 50  0000 C CNN
-F 2 "" H 10700 1500 50  0001 C CNN
-F 3 "" H 10700 1500 50  0001 C CNN
-	1    10700 1500
+F 0 "#PWR0615" H 2900 4750 50  0001 C CNN
+F 1 "+12V" H 2915 5073 50  0000 C CNN
+F 2 "" H 2900 4900 50  0001 C CNN
+F 3 "" H 2900 4900 50  0001 C CNN
+	1    2900 4900
 	1    0    0    -1  
 $EndComp
+Wire Wire Line
+	4550 5200 4600 5200
+$Comp
+L Device:R R?
+U 1 1 5E66CC07
+P 4750 5200
+AR Path="/5E4C0E28/5E66CC07" Ref="R?"  Part="1" 
+AR Path="/5E2DC494/5E66CC07" Ref="R621"  Part="1" 
+AR Path="/5E66CC07" Ref="R?"  Part="1" 
+F 0 "R621" V 4543 5200 50  0000 C CNN
+F 1 "1k" V 4634 5200 50  0000 C CNN
+F 2 "Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder" V 4680 5200 50  0001 C CNN
+F 3 "~" H 4750 5200 50  0001 C CNN
+F 4 "0" H 4750 5200 50  0001 C CNN "Need_order"
+	1    4750 5200
+	0    1    1    0   
+$EndComp
+$Comp
+L Diode:1N4148W D?
+U 1 1 5E66CC0F
+P 4400 5200
+AR Path="/5E3088F9/5E66CC0F" Ref="D?"  Part="1" 
+AR Path="/5E4C0E28/5E66CC0F" Ref="D?"  Part="1" 
+AR Path="/5E2DC494/5E66CC0F" Ref="D612"  Part="1" 
+AR Path="/5E66CC0F" Ref="D?"  Part="1" 
+F 0 "D612" H 4400 5417 50  0000 C CNN
+F 1 "1N4148W" H 4400 5326 50  0000 C CNN
+F 2 "Diode_SMD:D_SOD-123F" H 4400 5025 50  0001 C CNN
+F 3 "https://www.vishay.com/docs/85748/1n4148w.pdf" H 4400 5200 50  0001 C CNN
+F 4 "1N4148W" H 4400 5200 50  0001 C CNN "MPN"
+F 5 "1" H 4400 5200 50  0001 C CNN "Need_order"
+	1    4400 5200
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	5400 5000 5400 4900
+Wire Wire Line
+	5000 4900 5400 4900
+Wire Wire Line
+	5100 5200 5000 5200
+Wire Wire Line
+	4900 5200 5000 5200
+Connection ~ 5000 5200
+$Comp
+L Device:R R?
+U 1 1 5E66CC1B
+P 5000 5050
+AR Path="/5E4C0E28/5E66CC1B" Ref="R?"  Part="1" 
+AR Path="/5E2DC494/5E66CC1B" Ref="R622"  Part="1" 
+AR Path="/5E66CC1B" Ref="R?"  Part="1" 
+F 0 "R622" H 5070 5096 50  0000 L CNN
+F 1 "10k" H 5070 5005 50  0000 L CNN
+F 2 "Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder" V 4930 5050 50  0001 C CNN
+F 3 "~" H 5000 5050 50  0001 C CNN
+F 4 "0" H 5000 5050 50  0001 C CNN "Need_order"
+	1    5000 5050
+	1    0    0    -1  
+$EndComp
+Connection ~ 5400 4900
+$Comp
+L power:+12V #PWR?
+U 1 1 5E66CC2A
+P 5400 4900
+AR Path="/5E66CC2A" Ref="#PWR?"  Part="1" 
+AR Path="/5E2FA006/5E66CC2A" Ref="#PWR?"  Part="1" 
+AR Path="/5E2DC494/5E66CC2A" Ref="#PWR0616"  Part="1" 
+F 0 "#PWR0616" H 5400 4750 50  0001 C CNN
+F 1 "+12V" H 5415 5073 50  0000 C CNN
+F 2 "" H 5400 4900 50  0001 C CNN
+F 3 "" H 5400 4900 50  0001 C CNN
+	1    5400 4900
+	1    0    0    -1  
+$EndComp
+$Comp
+L Connector:Screw_Terminal_01x02 J?
+U 1 1 5E66CC32
+P 5700 5600
+AR Path="/5E3088F9/5E66CC32" Ref="J?"  Part="1" 
+AR Path="/5E66CC32" Ref="J?"  Part="1" 
+AR Path="/5E2DC494/5E66CC32" Ref="J602"  Part="1" 
+F 0 "J602" H 5780 5500 50  0000 L CNN
+F 1 "SEQ PA" H 5780 5591 50  0000 L CNN
+F 2 "TerminalBlock_Phoenix:TerminalBlock_Phoenix_MPT-0,5-2-2.54_1x02_P2.54mm_Horizontal" H 5700 5600 50  0001 C CNN
+F 3 "~" H 5700 5600 50  0001 C CNN
+F 4 "0" H 5700 5600 50  0001 C CNN "Need_order"
+	1    5700 5600
+	1    0    0    1   
+$EndComp
+Wire Wire Line
+	5500 5500 5400 5500
+Wire Wire Line
+	5400 5500 5400 5400
+$Comp
+L power:GNDA #PWR?
+U 1 1 5E66CC3A
+P 5400 5700
+AR Path="/5E3088F9/5E66CC3A" Ref="#PWR?"  Part="1" 
+AR Path="/5E66CC3A" Ref="#PWR?"  Part="1" 
+AR Path="/5E2DC494/5E66CC3A" Ref="#PWR0617"  Part="1" 
+F 0 "#PWR0617" H 5400 5450 50  0001 C CNN
+F 1 "GNDA" H 5405 5527 50  0000 C CNN
+F 2 "" H 5400 5700 50  0001 C CNN
+F 3 "" H 5400 5700 50  0001 C CNN
+	1    5400 5700
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	5400 5700 5400 5600
+Wire Wire Line
+	5400 5600 5500 5600
+Text HLabel 4150 5200 0    50   Input ~ 0
+SWITCH_EXT_PAn
+Wire Wire Line
+	4150 5200 4250 5200
+$Comp
+L Transistor_BJT:BCP51 Q608
+U 1 1 5E6AE5BD
+P 5300 5200
+F 0 "Q608" H 5490 5154 50  0000 L CNN
+F 1 "BCP52-16" H 5490 5245 50  0000 L CNN
+F 2 "Package_TO_SOT_SMD:SOT-223-3_TabPin2" H 5500 5125 50  0001 L CIN
+F 3 "" H 5300 5200 50  0001 L CNN
+F 4 "0" H 5300 5200 50  0001 C CNN "Need_order"
+F 5 "BCP52-16" H 5300 5200 50  0001 C CNN "MPN"
+	1    5300 5200
+	1    0    0    1   
+$EndComp
+Text Notes 900  4700 0    50   ~ 0
+with R617=2k2, 5mA base current\natmega can sink 40mA per pin, 200mA in total
+Text Notes 5500 5050 0    50   ~ 0
+hFE min 100\n1A max
+Text Notes 2150 5850 0    50   ~ 0
+Max voltage\n150% of 12V
+Text Notes 2850 6500 0    50   ~ 0
+Can switch\n1A
+Text Notes 7950 3450 0    50   ~ 0
+TODO\nverify BC856 resistors
 $EndSCHEMATC