--- a/hp34970.sch Sat Sep 19 21:03:39 2020 +0200
+++ b/hp34970.sch Sat Oct 09 16:17:26 2021 +0200
@@ -4,9 +4,9 @@
$Descr A4 11693 8268
encoding utf-8
Sheet 1 1
-Title ""
+Title "HP 34970A replacement front panel"
Date ""
-Rev ""
+Rev "2"
Comp ""
Comment1 ""
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1 6700 1575
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$Comp
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U 1 1 5F627A6B
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-F 3 "~" H 2000 1075 50 0001 C CNN
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0 1 1 0
$EndComp
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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$Comp
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U 1 1 5F653453
P 6700 1950
F 0 "R16" H 6775 2025 50 0000 L CNN
-F 1 "200k" H 6775 1950 50 0000 L CNN
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F 2 "Resistor_SMD:R_1206_3216Metric" V 6630 1950 50 0001 C CNN
F 3 "~" H 6700 1950 50 0001 C CNN
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Connection ~ 6700 2125
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Wire Wire Line
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F 3 "~" H 4100 4750 50 0001 C CNN
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Wire Wire Line
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Connection ~ 3600 4925
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NoConn ~ 6075 5300
Wire Wire Line
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Connection ~ 9100 1325
-Wire Wire Line
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-Text Label 9250 1325 0 50 ~ 0
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VDD
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Wire Wire Line
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Connection ~ 8725 1725
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F 3 "~" H 9100 1550 50 0001 C CNN
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F 3 "~" H 8725 1475 50 0001 C CNN
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Wire Wire Line
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Wire Wire Line
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-F 0 "SW21" V 3746 3852 50 0000 R CNN
-F 1 "RESET" V 3655 3852 50 0000 R CNN
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F 2 "Button_Switch_THT:SW_PUSH_6mm_H5mm" H 3700 4100 50 0001 C CNN
F 3 "~" H 3700 4100 50 0001 C CNN
1 3700 3900
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L Device:C C17
U 1 1 5F9B45D0
P 3875 3900
-F 0 "C17" H 3990 3946 50 0000 L CNN
-F 1 "100n" H 3990 3855 50 0000 L CNN
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F 2 "Capacitor_SMD:C_1206_3216Metric" H 3913 3750 50 0001 C CNN
F 3 "~" H 3875 3900 50 0001 C CNN
1 3875 3900
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Connection ~ 4950 3175
Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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Wire Wire Line
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-Connection ~ 2075 6950
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$Comp
L Device:R R17
U 1 1 5FA5F7E1
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$Comp
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U 1 1 5F6BCBE4
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1 0 0 -1
$EndComp
Wire Wire Line
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U 1 1 5F87CDAB
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0 1 1 0
$EndComp
$Comp
L Device:R R20
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0 1 1 0
$EndComp
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0 1 1 0
$EndComp
$Comp
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$EndComp
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SWDIO
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SWCLK
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NRST
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NRST
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VDD
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$Comp
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+Wire Wire Line
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1 0 0 -1
$EndComp
Wire Wire Line
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Wire Wire Line
- 1775 775 1875 775
+ 1050 625 1125 625
+Connection ~ 1050 625
+Wire Wire Line
+ 2725 1325 2925 1325
+Wire Wire Line
+ 2725 1625 2950 1625
+$Comp
+L Device:R R5
+U 1 1 5FCCD2CA
+P 2925 900
+F 0 "R5" H 2775 1025 50 0000 L CNN
+F 1 "1k" H 2775 900 50 0000 L CNN
+F 2 "Resistor_SMD:R_1206_3216Metric" V 2855 900 50 0001 C CNN
+F 3 "~" H 2925 900 50 0001 C CNN
+ 1 2925 900
+ 1 0 0 -1
+$EndComp
+Text Label 3000 675 0 50 ~ 0
++3.3V
+$Comp
+L Device:R R6
+U 1 1 5FCCD96D
+P 2950 1825
+F 0 "R6" H 3000 1900 50 0000 L CNN
+F 1 "1k5" H 3000 1825 50 0000 L CNN
+F 2 "Resistor_SMD:R_1206_3216Metric" V 2880 1825 50 0001 C CNN
+F 3 "~" H 2950 1825 50 0001 C CNN
+ 1 2950 1825
+ 1 0 0 -1
+$EndComp
+Text Label 3025 2025 0 50 ~ 0
++5V
+Wire Wire Line
+ 3000 675 2925 675
+Wire Wire Line
+ 2925 675 2925 750
+Wire Wire Line
+ 2925 1050 2925 1325
+Connection ~ 2925 1325
+Wire Wire Line
+ 2925 1325 3175 1325
+Wire Wire Line
+ 2950 1625 2950 1675
+Connection ~ 2950 1625
Wire Wire Line
- 10300 1600 10300 1750
+ 2950 1625 3175 1625
+Wire Wire Line
+ 2950 1975 2950 2025
+Wire Wire Line
+ 2950 2025 3025 2025
+Wire Notes Line
+ 3650 2375 475 2375
+Wire Wire Line
+ 1050 5800 1175 5800
+Wire Wire Line
+ 1175 5800 1175 5900
+NoConn ~ 1050 5200
+NoConn ~ 1050 5400
+NoConn ~ 1050 4800
+NoConn ~ 1050 4700
+Wire Wire Line
+ 2725 1725 2800 1725
+Wire Wire Line
+ 2800 1725 2800 1825
+Connection ~ 2800 1825
+Wire Wire Line
+ 2725 1425 2800 1425
Wire Wire Line
- 9800 1600 9800 1775
-Text Label 9800 1775 0 50 ~ 0
-GND_FLT
+ 2800 1425 2800 1725
+Connection ~ 2800 1725
+Wire Notes Line
+ 500 6375 4025 6375
+Wire Notes Line
+ 4025 6375 4025 7800
+Wire Notes Line
+ 1800 4100 1800 6375
+Wire Notes Line
+ 2725 4100 2725 2375
+Wire Notes Line
+ 475 4100 2725 4100
+Wire Notes Line
+ 6975 6525 6975 3700
+Wire Notes Line
+ 6975 3700 11225 3700
+Wire Notes Line
+ 7375 3725 7375 2625
+Wire Notes Line
+ 9125 2050 11225 2050
+Wire Notes Line
+ 9125 2050 9125 3700
+Wire Notes Line
+ 3650 525 3650 2625
+Wire Notes Line
+ 3650 2625 9125 2625
+Text Notes 4425 725 2 50 ~ 0
+Power supplies
+Text Notes 7625 1150 2 50 ~ 0
+18V -> 5V (500mA)
+Text Notes 10650 975 2 50 ~ 0
+5V -> 3.3V (150mA)
+Text Notes 10925 3375 2 50 ~ 0
+OLED display (SSD1322, 256x64, SPI)
+Text Notes 8700 3575 2 50 ~ 0
+SWD port
+Text Notes 2450 3900 2 50 ~ 0
+USB port (DFU, UART)
+Text Notes 3500 2250 2 50 ~ 0
+Level converter (5V <-> 3.3V)
+Text Notes 1475 4325 2 50 ~ 0
+Main unit connector
+Text Notes 7825 1525 2 50 ~ 0
+18V (in)
+$Comp
+L Device:R_Small R7
+U 1 1 615C5C6C
+P 1975 3425
+F 0 "R7" V 1900 3425 50 0000 C CNN
+F 1 "430k" V 2050 3300 50 0000 C CNN
+F 2 "" H 1975 3425 50 0001 C CNN
+F 3 "~" H 1975 3425 50 0001 C CNN
+ 1 1975 3425
+ 0 1 1 0
+$EndComp
+$Comp
+L Device:R_Small R8
+U 1 1 615C6F11
+P 2275 3425
+F 0 "R8" V 2200 3425 50 0000 C CNN
+F 1 "620k" V 2350 3450 50 0000 C CNN
+F 2 "" H 2275 3425 50 0001 C CNN
+F 3 "~" H 2275 3425 50 0001 C CNN
+ 1 2275 3425
+ 0 1 1 0
+$EndComp
+Wire Wire Line
+ 1725 3425 1875 3425
+Wire Wire Line
+ 2075 3425 2125 3425
+Wire Wire Line
+ 2375 3425 2525 3425
+Wire Wire Line
+ 2525 3425 2525 3125
+Wire Wire Line
+ 2525 3125 2250 3125
+Connection ~ 2525 3425
+Wire Wire Line
+ 2125 3425 2125 3600
+Connection ~ 2125 3425
+Wire Wire Line
+ 2125 3425 2175 3425
+Text Label 1900 3700 0 50 ~ 0
+USB_DETECT
+Wire Wire Line
+ 4350 6300 4100 6300
+Wire Wire Line
+ 4100 6300 4100 6150
+Wire Wire Line
+ 4350 6200 4175 6200
+Wire Wire Line
+ 4175 6200 4175 6100
+Wire Wire Line
+ 4175 6100 3800 6100
+$Comp
+L Connector:Conn_01x03_Female J5
+U 1 1 61675DD6
+P 3100 6000
+F 0 "J5" H 2992 5675 50 0000 C CNN
+F 1 "Serial_Console" H 2992 5766 50 0000 C CNN
+F 2 "" H 3100 6000 50 0001 C CNN
+F 3 "~" H 3100 6000 50 0001 C CNN
+ 1 3100 6000
+ -1 0 0 1
+$EndComp
+Wire Wire Line
+ 3800 6100 3800 5900
+Wire Wire Line
+ 3800 5900 3300 5900
+Wire Wire Line
+ 3750 6150 3750 6000
+Wire Wire Line
+ 3750 6000 3300 6000
+Wire Wire Line
+ 3750 6150 4100 6150
+$Comp
+L power:GND #PWR01
+U 1 1 616A818A
+P 3375 6175
+F 0 "#PWR01" H 3375 5925 50 0001 C CNN
+F 1 "GND" H 3380 6002 50 0000 C CNN
+F 2 "" H 3375 6175 50 0001 C CNN
+F 3 "" H 3375 6175 50 0001 C CNN
+ 1 3375 6175
+ 1 0 0 -1
+$EndComp
+Wire Wire Line
+ 3375 6175 3375 6100
+Wire Wire Line
+ 3375 6100 3300 6100
+NoConn ~ 4350 6100
$EndSCHEMATC
