stuff

Current_Limit_Circuit/docs/notes

@@ -0,0 +1,37 @@
+on the patent
+
+its the Vbe TC that is used. 
+
+on the lm334,
+it's the IC, and an external diode for the TC equalizing (if you use the example circuit later on to 
+balance the TC)
+
+
+
+on the patent
+
+figure 3 is the basic example.
+
+fig 1 omits the current mirror.
+
+figure 3 is described in the details section of the patent
+
+figure 4 or 5 has additional balancing.
+
+
+
+
+todo: build figure 20, and test to see what kind of current lowering I can get
+
+
+todo: build transistor only circuit of this current source, based on schematic in LM334 data sheet.
+might need multiple emitter transistor EDIT: I don't think so. they aren't common in standalone packages.
+only on ic die. and some are not true multi emitter, but just two bonded leads to the same emitter.
+
+https://en.m.wikipedia.org/wiki/Multiple-emitter_transistor
+
+
+article in edn covers what bob pease has for a circuit. similar to ti data sheet with transistor, but drives
+constant current for an led
+
+

Current_Limit_Circuit/pcb/fp-lib-table

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+X133195238Y-81470476D01*
+X133385714Y-81422857D01*
+X133719047Y-81422857D01*
+X133909523Y-81470476D01*
+X134004761Y-81565714D01*
+X134052380Y-81660952D01*
+X134052380Y-81851428D01*
+X133052380Y-80518095D02*
+X133052380Y-80994285D01*
+X133528571Y-81041904D01*
+X133480952Y-80994285D01*
+X133433333Y-80899047D01*
+X133433333Y-80660952D01*
+X133480952Y-80565714D01*
+X133528571Y-80518095D01*
+X133623809Y-80470476D01*
+X133861904Y-80470476D01*
+X133957142Y-80518095D01*
+X134004761Y-80565714D01*
+X134052380Y-80660952D01*
+X134052380Y-80899047D01*
+X134004761Y-80994285D01*
+X133957142Y-81041904D01*
+G04 #@! TO.C,Q6*
+X139997619Y-72485238D02*
+X139950000Y-72580476D01*
+X139854761Y-72675714D01*
+X139711904Y-72818571D01*
+X139664285Y-72913809D01*
+X139664285Y-73009047D01*
+X139902380Y-72961428D02*
+X139854761Y-73056666D01*
+X139759523Y-73151904D01*
+X139569047Y-73199523D01*
+X139235714Y-73199523D01*
+X139045238Y-73151904D01*
+X138950000Y-73056666D01*
+X138902380Y-72961428D01*
+X138902380Y-72770952D01*
+X138950000Y-72675714D01*
+X139045238Y-72580476D01*
+X139235714Y-72532857D01*
+X139569047Y-72532857D01*
+X139759523Y-72580476D01*
+X139854761Y-72675714D01*
+X139902380Y-72770952D01*
+X139902380Y-72961428D01*
+X138902380Y-71675714D02*
+X138902380Y-71866190D01*
+X138950000Y-71961428D01*
+X138997619Y-72009047D01*
+X139140476Y-72104285D01*
+X139330952Y-72151904D01*
+X139711904Y-72151904D01*
+X139807142Y-72104285D01*
+X139854761Y-72056666D01*
+X139902380Y-71961428D01*
+X139902380Y-71770952D01*
+X139854761Y-71675714D01*
+X139807142Y-71628095D01*
+X139711904Y-71580476D01*
+X139473809Y-71580476D01*
+X139378571Y-71628095D01*
+X139330952Y-71675714D01*
+X139283333Y-71770952D01*
+X139283333Y-71961428D01*
+X139330952Y-72056666D01*
+X139378571Y-72104285D01*
+X139473809Y-72151904D01*
+G04 #@! TD*
+M02*

Current_Limit_Circuit/pcb/gerbers/pcb.drl

@@ -0,0 +1,45 @@
+M48
+;DRILL file {KiCad 5.0.2+dfsg1-1~bpo9+1} date Wed 02 Sep 2020 01:24:05 AM EDT
+;FORMAT={-:-/ absolute / inch / decimal}
+FMAT,2
+INCH,TZ
+T1C0.0130
+T2C0.0295
+T3C0.0394
+%
+G90
+G05
+T1
+X4.7Y-3.35
+X5.25Y-3.35
+T2
+X5.35Y-3.2
+X5.4Y-3.15
+X5.4Y-3.25
+X5.Y-3.2
+X5.05Y-3.15
+X5.05Y-3.25
+X5.35Y-2.8
+X4.65Y-3.15
+X4.7Y-3.1
+X4.7Y-3.2
+X5.35Y-2.9
+X5.4Y-2.85
+X5.05Y-2.8
+X5.05Y-2.9
+X5.1Y-2.85
+X4.8Y-2.8
+X4.8Y-2.9
+X4.85Y-2.85
+T3
+X5.55Y-3.35
+X5.65Y-3.35
+X5.75Y-3.35
+X5.55Y-3.5
+X5.65Y-3.5
+X5.75Y-3.5
+X5.55Y-2.65
+X5.65Y-2.65
+X5.75Y-2.65
+T0
+M30

Current_Limit_Circuit/pcb/pcb-cache.lib

@@ -0,0 +1,83 @@
+EESchema-LIBRARY Version 2.4
+#encoding utf-8
+#
+# Connector_Conn_01x03_Female
+#
+DEF Connector_Conn_01x03_Female J 0 40 Y N 1 F N
+F0 "J" 0 200 50 H V C CNN
+F1 "Connector_Conn_01x03_Female" 0 -200 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ Connector*:*_1x??_*
+$ENDFPLIST
+DRAW
+A 0 -100 20 901 -901 1 1 6 N 0 -80 0 -120
+A 0 0 20 901 -901 1 1 6 N 0 20 0 -20
+A 0 100 20 901 -901 1 1 6 N 0 120 0 80
+P 2 1 1 6 -50 -100 -20 -100 N
+P 2 1 1 6 -50 0 -20 0 N
+P 2 1 1 6 -50 100 -20 100 N
+X Pin_1 1 -200 100 150 R 50 50 1 1 P
+X Pin_2 2 -200 0 150 R 50 50 1 1 P
+X Pin_3 3 -200 -100 150 R 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_C_Small
+#
+DEF Device_C_Small C 0 10 N N 1 F N
+F0 "C" 10 70 50 H V L CNN
+F1 "Device_C_Small" 10 -80 50 H V L CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+$FPLIST
+ C_*
+$ENDFPLIST
+DRAW
+P 2 0 1 13 -60 -20 60 -20 N
+P 2 0 1 12 -60 20 60 20 N
+X ~ 1 0 100 80 D 50 50 1 1 P
+X ~ 2 0 -100 80 U 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_Q_NPN_EBC
+#
+DEF Device_Q_NPN_EBC Q 0 0 Y N 1 F N
+F0 "Q" 200 50 50 H V L CNN
+F1 "Device_Q_NPN_EBC" 200 -50 50 H V L CNN
+F2 "" 200 100 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+C 50 0 111 0 1 10 N
+P 2 0 1 0 25 25 100 100 N
+P 3 0 1 0 25 -25 100 -100 100 -100 N
+P 3 0 1 20 25 75 25 -75 25 -75 N
+P 5 0 1 0 50 -70 70 -50 90 -90 50 -70 50 -70 F
+X E 1 100 -200 100 U 50 50 1 1 P
+X B 2 -200 0 225 R 50 50 1 1 P
+X C 3 100 200 100 D 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+# Device_Q_PNP_EBC
+#
+DEF Device_Q_PNP_EBC Q 0 0 Y N 1 F N
+F0 "Q" 200 50 50 H V L CNN
+F1 "Device_Q_PNP_EBC" 200 -50 50 H V L CNN
+F2 "" 200 100 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+C 50 0 111 0 1 10 N
+P 2 0 1 0 25 25 100 100 N
+P 3 0 1 0 25 -25 100 -100 100 -100 N
+P 3 0 1 20 25 75 25 -75 25 -75 N
+P 5 0 1 0 90 -70 70 -90 50 -50 90 -70 90 -70 F
+X E 1 100 -200 100 U 50 50 1 1 P
+X B 2 -200 0 225 R 50 50 1 1 I
+X C 3 100 200 100 D 50 50 1 1 P
+ENDDRAW
+ENDDEF
+#
+#End Library

Current_Limit_Circuit/pcb/pcb.bak

@@ -0,0 +1,222 @@
+EESchema Schematic File Version 4
+EELAYER 26 0
+EELAYER END
+$Descr USLetter 11000 8500
+encoding utf-8
+Sheet 1 1
+Title ""
+Date ""
+Rev ""
+Comp ""
+Comment1 ""
+Comment2 ""
+Comment3 ""
+Comment4 ""
+$EndDescr
+$Comp
+L Device:Q_NPN_EBC Q3
+U 1 1 5F4F20B3
+P 3300 3900
+F 0 "Q3" H 3525 4025 50  0000 L CNN
+F 1 "Q_NPN_EBC" H 3491 3855 50  0001 L CNN
+F 2 "Package_TO_SOT_THT:TO-92" H 3500 4000 50  0001 C CNN
+F 3 "~" H 3300 3900 50  0001 C CNN
+	1    3300 3900
+	-1   0    0    -1  
+$EndComp
+$Comp
+L Device:Q_NPN_EBC Q1
+U 1 1 5F4F2141
+P 2450 3650
+F 0 "Q1" H 2700 3775 50  0000 L CNN
+F 1 "Q_NPN_EBC" H 2640 3605 50  0001 L CNN
+F 2 "Package_TO_SOT_THT:TO-92" H 2650 3750 50  0001 C CNN
+F 3 "~" H 2450 3650 50  0001 C CNN
+	1    2450 3650
+	-1   0    0    -1  
+$EndComp
+$Comp
+L Device:Q_PNP_EBC Q4
+U 1 1 5F4F2221
+P 3650 3150
+F 0 "Q4" H 3875 3000 50  0000 L CNN
+F 1 "Q_PNP_BCE" H 3841 3105 50  0001 L CNN
+F 2 "Package_TO_SOT_THT:TO-92" H 3850 3250 50  0001 C CNN
+F 3 "~" H 3650 3150 50  0001 C CNN
+	1    3650 3150
+	1    0    0    1   
+$EndComp
+$Comp
+L Device:Q_PNP_EBC Q2
+U 1 1 5F4F2286
+P 3100 3150
+F 0 "Q2" H 3325 3025 50  0000 L CNN
+F 1 "Q_PNP_EBC" H 3291 3105 50  0001 L CNN
+F 2 "Package_TO_SOT_THT:TO-92" H 3300 3250 50  0001 C CNN
+F 3 "~" H 3100 3150 50  0001 C CNN
+	1    3100 3150
+	1    0    0    1   
+$EndComp
+$Comp
+L Device:Q_PNP_EBC Q6
+U 1 1 5F4F232A
+P 4550 3150
+F 0 "Q6" H 4775 3000 50  0000 L CNN
+F 1 "Q_PNP_BCE" H 4741 3105 50  0001 L CNN
+F 2 "Package_TO_SOT_THT:TO-92" H 4750 3250 50  0001 C CNN
+F 3 "~" H 4550 3150 50  0001 C CNN
+	1    4550 3150
+	1    0    0    1   
+$EndComp
+$Comp
+L Device:Q_NPN_EBC Q5
+U 1 1 5F4F23D5
+P 4000 3900
+F 0 "Q5" H 4300 4075 50  0000 L CNN
+F 1 "Q_NPN_EBC" H 4191 3855 50  0001 L CNN
+F 2 "Package_TO_SOT_THT:TO-92" H 4200 4000 50  0001 C CNN
+F 3 "~" H 4000 3900 50  0001 C CNN
+	1    4000 3900
+	1    0    0    -1  
+$EndComp
+$Comp
+L Device:C_Small C1
+U 1 1 5F4F2484
+P 2800 3900
+F 0 "C1" H 2892 3946 50  0000 L CNN
+F 1 "50pf" H 2892 3855 50  0000 L CNN
+F 2 "Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder" H 2800 3900 50  0001 C CNN
+F 3 "~" H 2800 3900 50  0001 C CNN
+	1    2800 3900
+	1    0    0    -1  
+$EndComp
+$Comp
+L Connector:Conn_01x03_Female J2
+U 1 1 5F4F27A8
+P 4850 2600
+F 0 "J2" H 4878 2580 50  0000 L CNN
+F 1 "Conn_01x03_Female" H 4877 2535 50  0001 L CNN
+F 2 "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical" H 4850 2600 50  0001 C CNN
+F 3 "~" H 4850 2600 50  0001 C CNN
+	1    4850 2600
+	1    0    0    -1  
+$EndComp
+$Comp
+L Connector:Conn_01x03_Female J1
+U 1 1 5F4F28F4
+P 4800 4600
+F 0 "J1" H 4828 4580 50  0000 L CNN
+F 1 "Conn_01x03_Female" H 4827 4535 50  0001 L CNN
+F 2 "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical" H 4800 4600 50  0001 C CNN
+F 3 "~" H 4800 4600 50  0001 C CNN
+	1    4800 4600
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	4650 2500 4650 2600
+Connection ~ 4650 2600
+Wire Wire Line
+	4650 2600 4650 2700
+Connection ~ 4650 2700
+Wire Wire Line
+	4650 2700 4650 2950
+Wire Wire Line
+	4350 3150 3450 3150
+Wire Wire Line
+	3450 3150 2900 3150
+Connection ~ 3450 3150
+Wire Wire Line
+	2900 3150 2350 3150
+Wire Wire Line
+	2350 3150 2350 3450
+Connection ~ 2900 3150
+Wire Wire Line
+	2800 3650 2800 3800
+Wire Wire Line
+	2650 3650 2800 3650
+Wire Wire Line
+	4650 2700 3750 2700
+Wire Wire Line
+	3750 2700 3750 2950
+Wire Wire Line
+	3750 2700 3200 2700
+Wire Wire Line
+	3200 2700 3200 2950
+Connection ~ 3750 2700
+Wire Wire Line
+	2350 3850 2350 4300
+Wire Wire Line
+	3750 3350 3750 3500
+Wire Wire Line
+	3750 3900 3800 3900
+Connection ~ 3750 3900
+Wire Wire Line
+	4100 3700 4100 3500
+Wire Wire Line
+	4100 3500 3750 3500
+Connection ~ 3750 3500
+Wire Wire Line
+	3750 3500 3750 3900
+Wire Wire Line
+	3500 3900 3750 3900
+Wire Wire Line
+	3200 3700 3200 3650
+Wire Wire Line
+	3200 4100 3200 4500
+Wire Wire Line
+	2800 4000 2800 4500
+Wire Wire Line
+	2800 4500 3200 4500
+Wire Wire Line
+	3200 4500 4600 4500
+Connection ~ 3200 4500
+Wire Wire Line
+	4600 4500 4600 4600
+Connection ~ 4600 4500
+Connection ~ 4600 4600
+Wire Wire Line
+	4600 4600 4600 4700
+Wire Wire Line
+	4650 3350 4650 4300
+Wire Wire Line
+	2350 4300 4100 4300
+Wire Wire Line
+	4650 4300 5000 4300
+Connection ~ 4650 4300
+Text Notes 5300 3300 0    50   ~ 0
+snvs746d.pdf\nTexas Instruments \nLM334 Schematic\nPage 16\n\nResistor can be 0 TC\n(nichrome, or wire wound)\n\nTC of Vbe(which?) will effect circuit.
+$Comp
+L Connector:Conn_01x03_Female J3
+U 1 1 5F4F59C1
+P 5200 4200
+F 0 "J3" H 5227 4226 50  0000 L CNN
+F 1 "Conn_01x03_Female" H 5227 4135 50  0000 L CNN
+F 2 "Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical" H 5200 4200 50  0001 C CNN
+F 3 "~" H 5200 4200 50  0001 C CNN
+	1    5200 4200
+	1    0    0    -1  
+$EndComp
+Wire Wire Line
+	5000 4100 5000 4200
+Connection ~ 5000 4300
+Connection ~ 5000 4200
+Wire Wire Line
+	5000 4200 5000 4300
+Text Notes 5325 4125 0    50   ~ 0
+Resistor
+Text Notes 4975 4575 0    50   ~ 0
+Gnd\n
+Text Notes 5000 2550 0    50   ~ 0
+VCC
+Wire Wire Line
+	4100 4100 4100 4300
+Connection ~ 4100 4300
+Wire Wire Line
+	4100 4300 4650 4300
+Wire Wire Line
+	2800 3650 3200 3650
+Connection ~ 2800 3650
+Connection ~ 3200 3650
+Wire Wire Line
+	3200 3650 3200 3350
+$EndSCHEMATC

Current_Limit_Circuit/pcb/pcb.net

@@ -0,0 +1,172 @@
+(export (version D)
+  (design
+    (source /home/layoutdev/Desktop/code/documentation_general/Electronics_Projects_2020/Current_Limit_Circuit/pcb/pcb.sch)
+    (date "Wed 02 Sep 2020 12:54:33 AM EDT")
+    (tool "Eeschema 5.0.2+dfsg1-1~bpo9+1")
+    (sheet (number 1) (name /) (tstamps /)
+      (title_block
+        (title)
+        (company)
+        (rev)
+        (date)
+        (source pcb.sch)
+        (comment (number 1) (value ""))
+        (comment (number 2) (value ""))
+        (comment (number 3) (value ""))
+        (comment (number 4) (value "")))))
+  (components
+    (comp (ref Q3)
+      (value Q_NPN_EBC)
+      (footprint Package_TO_SOT_THT:TO-92)
+      (datasheet ~)
+      (libsource (lib Device) (part Q_NPN_EBC) (description "NPN transistor, emitter/base/collector"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5F4F20B3))
+    (comp (ref Q1)
+      (value Q_NPN_EBC)
+      (footprint Package_TO_SOT_THT:TO-92)
+      (datasheet ~)
+      (libsource (lib Device) (part Q_NPN_EBC) (description "NPN transistor, emitter/base/collector"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5F4F2141))
+    (comp (ref Q4)
+      (value Q_PNP_EBC)
+      (footprint Package_TO_SOT_THT:TO-92)
+      (datasheet ~)
+      (libsource (lib Device) (part Q_PNP_EBC) (description "PNP transistor, emitter/base/collector"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5F4F2221))
+    (comp (ref Q2)
+      (value Q_PNP_EBC)
+      (footprint Package_TO_SOT_THT:TO-92)
+      (datasheet ~)
+      (libsource (lib Device) (part Q_PNP_EBC) (description "PNP transistor, emitter/base/collector"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5F4F2286))
+    (comp (ref Q6)
+      (value Q_PNP_EBC)
+      (footprint Package_TO_SOT_THT:TO-92)
+      (datasheet ~)
+      (libsource (lib Device) (part Q_PNP_EBC) (description "PNP transistor, emitter/base/collector"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5F4F232A))
+    (comp (ref Q5)
+      (value Q_NPN_EBC)
+      (footprint Package_TO_SOT_THT:TO-92)
+      (datasheet ~)
+      (libsource (lib Device) (part Q_NPN_EBC) (description "NPN transistor, emitter/base/collector"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5F4F23D5))
+    (comp (ref C1)
+      (value 50pf)
+      (footprint Capacitor_SMD:C_0805_2012Metric_Pad1.15x1.40mm_HandSolder)
+      (datasheet ~)
+      (libsource (lib Device) (part C_Small) (description "Unpolarized capacitor, small symbol"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5F4F2484))
+    (comp (ref J2)
+      (value Conn_01x03_Female)
+      (footprint Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical)
+      (datasheet ~)
+      (libsource (lib Connector) (part Conn_01x03_Female) (description "Generic connector, single row, 01x03, script generated (kicad-library-utils/schlib/autogen/connector/)"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5F4F27A8))
+    (comp (ref J1)
+      (value Conn_01x03_Female)
+      (footprint Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical)
+      (datasheet ~)
+      (libsource (lib Connector) (part Conn_01x03_Female) (description "Generic connector, single row, 01x03, script generated (kicad-library-utils/schlib/autogen/connector/)"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5F4F28F4))
+    (comp (ref J3)
+      (value Conn_01x03_Female)
+      (footprint Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical)
+      (datasheet ~)
+      (libsource (lib Connector) (part Conn_01x03_Female) (description "Generic connector, single row, 01x03, script generated (kicad-library-utils/schlib/autogen/connector/)"))
+      (sheetpath (names /) (tstamps /))
+      (tstamp 5F4F59C1)))
+  (libparts
+    (libpart (lib Connector) (part Conn_01x03_Female)
+      (description "Generic connector, single row, 01x03, script generated (kicad-library-utils/schlib/autogen/connector/)")
+      (docs ~)
+      (footprints
+        (fp Connector*:*_1x??_*))
+      (fields
+        (field (name Reference) J)
+        (field (name Value) Conn_01x03_Female))
+      (pins
+        (pin (num 1) (name Pin_1) (type passive))
+        (pin (num 2) (name Pin_2) (type passive))
+        (pin (num 3) (name Pin_3) (type passive))))
+    (libpart (lib Device) (part C_Small)
+      (description "Unpolarized capacitor, small symbol")
+      (docs ~)
+      (footprints
+        (fp C_*))
+      (fields
+        (field (name Reference) C)
+        (field (name Value) C_Small))
+      (pins
+        (pin (num 1) (name ~) (type passive))
+        (pin (num 2) (name ~) (type passive))))
+    (libpart (lib Device) (part Q_NPN_EBC)
+      (description "NPN transistor, emitter/base/collector")
+      (docs ~)
+      (fields
+        (field (name Reference) Q)
+        (field (name Value) Q_NPN_EBC))
+      (pins
+        (pin (num 1) (name E) (type passive))
+        (pin (num 2) (name B) (type passive))
+        (pin (num 3) (name C) (type passive))))
+    (libpart (lib Device) (part Q_PNP_EBC)
+      (description "PNP transistor, emitter/base/collector")
+      (docs ~)
+      (fields
+        (field (name Reference) Q)
+        (field (name Value) Q_PNP_EBC))
+      (pins
+        (pin (num 1) (name E) (type passive))
+        (pin (num 2) (name B) (type input))
+        (pin (num 3) (name C) (type passive)))))
+  (libraries
+    (library (logical Connector)
+      (uri /usr/share/kicad/library/Connector.lib))
+    (library (logical Device)
+      (uri /usr/share/kicad/library/Device.lib)))
+  (nets
+    (net (code 1) (name "Net-(C1-Pad2)")
+      (node (ref J1) (pin 1))
+      (node (ref J1) (pin 2))
+      (node (ref J1) (pin 3))
+      (node (ref Q3) (pin 1))
+      (node (ref C1) (pin 2)))
+    (net (code 2) (name "Net-(Q3-Pad2)")
+      (node (ref Q3) (pin 2))
+      (node (ref Q4) (pin 3))
+      (node (ref Q5) (pin 2))
+      (node (ref Q5) (pin 3)))
+    (net (code 3) (name "Net-(J3-Pad1)")
+      (node (ref Q1) (pin 1))
+      (node (ref Q6) (pin 3))
+      (node (ref Q5) (pin 1))
+      (node (ref J3) (pin 1))
+      (node (ref J3) (pin 2))
+      (node (ref J3) (pin 3)))
+    (net (code 4) (name "Net-(J2-Pad1)")
+      (node (ref J2) (pin 2))
+      (node (ref J2) (pin 3))
+      (node (ref Q4) (pin 1))
+      (node (ref Q2) (pin 1))
+      (node (ref J2) (pin 1))
+      (node (ref Q6) (pin 1)))
+    (net (code 5) (name "Net-(Q1-Pad3)")
+      (node (ref Q2) (pin 2))
+      (node (ref Q4) (pin 2))
+      (node (ref Q6) (pin 2))
+      (node (ref Q1) (pin 3)))
+    (net (code 6) (name "Net-(C1-Pad1)")
+      (node (ref C1) (pin 1))
+      (node (ref Q2) (pin 3))
+      (node (ref Q3) (pin 3))
+      (node (ref Q1) (pin 2)))))

Current_Limit_Circuit/pcb/pcb.pro

@@ -0,0 +1,41 @@
+update=Wed 02 Sep 2020 12:48:01 AM EDT
+version=1
+last_client=kicad
+[cvpcb]
+version=1
+NetIExt=net
+[pcbnew]
+version=1
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+LastNetListRead=
+PadDrill=0.600000000000
+PadDrillOvalY=0.600000000000
+PadSizeH=1.500000000000
+PadSizeV=1.500000000000
+PcbTextSizeV=1.016000000000
+PcbTextSizeH=1.016000000000
+PcbTextThickness=0.152400000000
+ModuleTextSizeV=1.016000000000
+ModuleTextSizeH=1.016000000000
+ModuleTextSizeThickness=0.152400000000
+SolderMaskClearance=0.003000000000
+SolderMaskMinWidth=0.004000000000
+DrawSegmentWidth=0.152400000000
+BoardOutlineThickness=0.152400000000
+ModuleOutlineThickness=0.152400000000
+[eeschema]
+version=1
+LibDir=
+[eeschema/libraries]
+[general]
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+[schematic_editor]
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+PlotDirectoryName=
+SubpartIdSeparator=0
+SubpartFirstId=65
+NetFmtName=Pcbnew
+SpiceAjustPassiveValues=0
+LabSize=50
+ERC_TestSimilarLabels=1

Current_Limit_Circuit/pcb/pcb.sch

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+EELAYER END
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+Sheet 1 1
+Title ""
+Date ""
+Rev ""
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+Comment2 ""
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+Comment4 ""
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+	1    0    0    1   
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+	1    3100 3150
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+snvs746d.pdf\nTexas Instruments \nLM334 Schematic\nPage 16\n\nResistor can be 0 TC\n(nichrome, or wire wound)\n\nTC of Vbe(which?) will effect circuit.
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