EESchema Schematic File Version 2 LIBS:power LIBS:device LIBS:transistors LIBS:conn LIBS:linear LIBS:regul LIBS:74xx LIBS:cmos4000 LIBS:adc-dac LIBS:memory LIBS:xilinx LIBS:microcontrollers LIBS:dsp LIBS:microchip LIBS:analog_switches LIBS:motorola LIBS:texas LIBS:intel LIBS:audio LIBS:interface LIBS:digital-audio LIBS:philips LIBS:display LIBS:cypress LIBS:siliconi LIBS:opto LIBS:atmel LIBS:contrib LIBS:valves LIBS:65xx LIBS:w_connectors LIBS:switches LIBS:RC6502 Serial IO-cache EELAYER 25 0 EELAYER END $Descr A4 11693 8268 encoding utf-8 Sheet 1 1 Title "" Date "" Rev "" Comp "" Comment1 "" Comment2 "" Comment3 "" Comment4 "" $EndDescr Text GLabel 10600 3800 0 60 Input ~ 0 GND Text GLabel 10600 3900 0 60 Output ~ 0 VCC Text GLabel 10600 2200 0 60 Output ~ 0 A15 Text GLabel 10600 2500 0 60 Output ~ 0 A12 Text GLabel 10600 3300 0 60 Output ~ 0 A4 Text GLabel 10600 3600 0 60 Output ~ 0 A1 Text GLabel 10600 3700 0 60 Output ~ 0 A0 Text GLabel 10600 4800 0 60 BiDi ~ 0 D0 Text GLabel 10600 4900 0 60 BiDi ~ 0 D1 Text GLabel 10600 5000 0 60 BiDi ~ 0 D2 Text GLabel 10600 5100 0 60 BiDi ~ 0 D3 Text GLabel 10600 5200 0 60 BiDi ~ 0 D4 Text GLabel 10600 5300 0 60 BiDi ~ 0 D5 Text GLabel 10600 5400 0 60 BiDi ~ 0 D6 Text GLabel 10600 5500 0 60 BiDi ~ 0 D7 Text GLabel 3950 1650 2 60 BiDi ~ 0 D0 Text GLabel 3950 1750 2 60 BiDi ~ 0 D1 Text GLabel 3950 1850 2 60 BiDi ~ 0 D2 Text GLabel 3950 1950 2 60 BiDi ~ 0 D3 Text GLabel 3950 2050 2 60 BiDi ~ 0 D4 Text GLabel 3950 2250 2 60 BiDi ~ 0 D6 Text GLabel 3950 2350 2 60 BiDi ~ 0 D7 NoConn ~ 10600 5800 NoConn ~ 10600 4300 NoConn ~ 10600 4700 Text GLabel 2700 3450 0 60 Input ~ 0 A12 Text GLabel 3950 1450 2 60 Input ~ 0 A1 Text GLabel 3950 1350 2 60 Input ~ 0 A0 Text Notes 8150 7500 2 60 ~ 0 RC6502 Serial IO Text Notes 10625 7650 2 60 ~ 0 B NoConn ~ -500 7850 $Comp L CONN_01X39 J1 U 1 1 590B4CA1 P 10800 4100 F 0 "J1" H 10800 6100 50 0000 C CNN F 1 "CONN_01X39" V 10900 4100 50 0000 C CNN F 2 "Pin_Headers:Pin_Header_Angled_1x39_Pitch2.54mm" H 10800 4100 50 0001 C CNN F 3 "" H 10800 4100 50 0001 C CNN 1 10800 4100 1 0 0 -1 $EndComp NoConn ~ 10600 5900 NoConn ~ 10600 4400 NoConn ~ 10600 4600 $Comp L C C1 U 1 1 590DFF39 P 10025 1225 F 0 "C1" H 10050 1325 50 0000 L CNN F 1 "100nF" H 10050 1125 50 0000 L CNN F 2 "Capacitors_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm" H 10063 1075 50 0001 C CNN F 3 "" H 10025 1225 50 0001 C CNN 1 10025 1225 1 0 0 -1 $EndComp $Comp L C C2 U 1 1 590E0960 P 10275 1225 F 0 "C2" H 10300 1325 50 0000 L CNN F 1 "100nF" H 10300 1125 50 0000 L CNN F 2 "Capacitors_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm" H 10313 1075 50 0001 C CNN F 3 "" H 10275 1225 50 0001 C CNN 1 10275 1225 1 0 0 -1 $EndComp Text GLabel 10025 825 1 60 Input ~ 0 VCC Text GLabel 3950 2150 2 60 BiDi ~ 0 D5 Text GLabel 10025 1650 3 60 Input ~ 0 GND Text GLabel 10600 2300 0 60 Output ~ 0 A14 Text GLabel 10600 2400 0 60 Output ~ 0 A13 $Comp L C C3 U 1 1 59106500 P 10575 1225 F 0 "C3" H 10600 1325 50 0000 L CNN F 1 "100nF" H 10600 1125 50 0000 L CNN F 2 "Capacitors_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm" H 10613 1075 50 0001 C CNN F 3 "" H 10575 1225 50 0001 C CNN 1 10575 1225 1 0 0 -1 $EndComp NoConn ~ 10600 6000 $Comp L WD65C21 U2 U 1 1 590F34BB P 3300 1850 F 0 "U2" H 3300 2900 60 0000 C CNN F 1 "WD65C21" V 3300 1800 60 0000 C CNN F 2 "Housings_DIP:DIP-40_W15.24mm_Socket" H 2800 2050 60 0001 C CNN F 3 "" H 2800 2050 60 0000 C CNN 1 3300 1850 1 0 0 -1 $EndComp Text GLabel 10600 4100 0 60 Output ~ 0 RESET Text GLabel 3950 1550 2 60 Input ~ 0 RESET Text GLabel 10600 4000 0 60 Output ~ 0 PHI2 Text GLabel 3950 2450 2 60 Input ~ 0 PHI2 NoConn ~ 10600 4200 $Comp L 74LS138 U3 U 1 1 590F5A10 P 3300 3800 F 0 "U3" H 3300 4300 50 0000 C CNN F 1 "74HCT38" V 3300 3800 50 0000 C CNN F 2 "Housings_DIP:DIP-16_W7.62mm_Socket" H 3300 3800 50 0001 C CNN F 3 "" H 3300 3800 50 0001 C CNN 1 3300 3800 1 0 0 -1 $EndComp Text GLabel 10600 4500 0 60 Output ~ 0 RW Text GLabel 3950 2850 2 60 Input ~ 0 RW Text GLabel 2700 3550 0 60 Input ~ 0 A13 Text GLabel 2700 3650 0 60 Input ~ 0 A14 Text GLabel 2700 3950 0 60 Input ~ 0 A15 Text GLabel 2400 4300 3 60 Output ~ 0 GND NoConn ~ 3900 3450 NoConn ~ 3900 3550 NoConn ~ 3900 3650 NoConn ~ 3900 3750 NoConn ~ 3900 3850 NoConn ~ 3900 4050 NoConn ~ 3900 4150 Text GLabel 2650 2850 0 60 Input ~ 0 VCC Text GLabel 3950 950 2 60 Input ~ 0 KBD_STROBE Text GLabel 3950 1050 2 60 Output ~ 0 KBD_READY NoConn ~ 3950 1150 NoConn ~ 3950 1250 Text GLabel 2650 950 0 60 Output ~ 0 GND Text GLabel 4450 2400 1 60 Input ~ 0 VCC Text GLabel 3950 2750 2 60 Input ~ 0 A4 NoConn ~ 10600 3500 NoConn ~ 10600 3400 NoConn ~ 10600 3200 NoConn ~ 10600 3100 NoConn ~ 10600 3000 NoConn ~ 10600 2900 NoConn ~ 10600 2800 NoConn ~ 10600 2700 NoConn ~ 10600 2600 $Comp L 74HCT04 U1 U 1 1 590F843D P 1850 2750 F 0 "U1" H 2000 2850 50 0000 C CNN F 1 "74HCT04" H 2050 2650 50 0000 C CNN F 2 "Housings_DIP:DIP-14_W7.62mm_Socket" H 1850 2750 50 0001 C CNN F 3 "" H 1850 2750 50 0001 C CNN 1 1850 2750 -1 0 0 1 $EndComp $Comp L C C5 U 1 1 590F85AC P 1250 2750 F 0 "C5" H 1275 2850 50 0000 L CNN F 1 "10nF" H 1275 2650 50 0000 L CNN F 2 "Capacitors_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm" H 1250 2750 50 0001 C CNN F 3 "" H 1250 2750 50 0001 C CNN 1 1250 2750 0 -1 -1 0 $EndComp Text GLabel 2650 2650 0 60 Input ~ 0 OUT_RDA Text GLabel 950 2550 0 60 Output ~ 0 OUT_DA Text GLabel 2650 1050 0 60 Input ~ 0 KBD_D0 Text GLabel 2650 1150 0 60 Input ~ 0 KBD_D1 Text GLabel 2650 1250 0 60 Input ~ 0 KBD_D2 Text GLabel 2650 1350 0 60 Input ~ 0 KBD_D3 Text GLabel 2650 1450 0 60 Input ~ 0 KBD_D4 Text GLabel 2650 1550 0 60 Input ~ 0 KBD_D5 Text GLabel 2650 1650 0 60 Input ~ 0 KBD_D6 Text GLabel 2650 1850 0 60 Output ~ 0 OUT_D0 Text GLabel 2650 1950 0 60 Output ~ 0 OUT_D1 Text GLabel 2650 2050 0 60 Output ~ 0 OUT_D2 Text GLabel 2650 2150 0 60 Output ~ 0 OUT_D3 Text GLabel 2650 2250 0 60 Output ~ 0 OUT_D4 Text GLabel 2650 2350 0 60 Output ~ 0 OUT_D5 Text GLabel 2650 2450 0 60 Output ~ 0 OUT_D6 $Comp L MCP23S17 U4 U 1 1 5910D88B P 5700 1800 F 0 "U4" H 5450 2750 50 0000 R CNN F 1 "MCP23S17" V 5700 1800 50 0000 C CNN F 2 "Housings_DIP:DIP-28_W7.62mm_Socket" H 5750 850 50 0001 L CNN F 3 "" H 5950 2800 50 0001 C CNN 1 5700 1800 1 0 0 -1 $EndComp Text GLabel 5200 1900 0 60 Input ~ 0 OUT_D0 Text GLabel 5200 2000 0 60 Input ~ 0 OUT_D1 Text GLabel 5200 2100 0 60 Input ~ 0 OUT_D2 Text GLabel 5200 2200 0 60 Input ~ 0 OUT_D3 Text GLabel 5200 2300 0 60 Input ~ 0 OUT_D4 Text GLabel 5200 2400 0 60 Input ~ 0 OUT_D5 Text GLabel 5200 2500 0 60 Input ~ 0 OUT_D6 Text GLabel 6350 4000 3 60 Output ~ 0 GND Text GLabel 5700 800 1 60 Input ~ 0 VCC $Comp L Arduino_Nano_Header J2 U 1 1 59110A3B P 7750 1700 F 0 "J2" H 7750 2500 60 0000 C CNN F 1 "Arduino Nano" V 7750 1700 60 0000 C CNN F 2 "Modules:Arduino_Nano" H 7750 1700 60 0001 C CNN F 3 "" H 7750 1700 60 0000 C CNN 1 7750 1700 1 0 0 -1 $EndComp Text GLabel 8250 1100 2 60 Output ~ 0 GND Text GLabel 9300 1450 2 60 Output ~ 0 VCC $Comp L R R3 U 1 1 59112B96 P 7750 3000 F 0 "R3" V 7830 3000 50 0000 C CNN F 1 "10k" V 7750 3000 50 0000 C CNN F 2 "Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 7680 3000 50 0001 C CNN F 3 "" H 7750 3000 50 0001 C CNN 1 7750 3000 0 1 1 0 $EndComp $Comp L SW_Push SW1 U 1 1 59115E08 P 9200 1200 F 0 "SW1" H 9250 1300 50 0000 L CNN F 1 "Reset" H 9200 1140 50 0000 C CNN F 2 "Buttons_Switches_THT:SW_PUSH_6mm" H 9200 1400 50 0001 C CNN F 3 "" H 9200 1400 50 0001 C CNN 1 9200 1200 1 0 0 -1 $EndComp Text GLabel 9600 1200 2 60 Output ~ 0 GND Wire Wire Line 10025 1375 10025 1650 Wire Wire Line 10025 1475 10875 1475 Wire Wire Line 10275 1475 10275 1375 Connection ~ 10275 1475 Wire Wire Line 10025 975 10875 975 Wire Wire Line 10025 825 10025 1075 Wire Wire Line 10275 975 10275 1075 Connection ~ 10275 975 Wire Wire Line 10575 975 10575 1075 Wire Wire Line 10575 1475 10575 1375 Wire Wire Line 10875 975 10875 1075 Connection ~ 10575 975 Wire Wire Line 10875 1475 10875 1375 Connection ~ 10575 1475 Wire Wire Line 3900 3950 4450 3950 Wire Wire Line 4450 3950 4450 2650 Wire Wire Line 4450 2650 3950 2650 Wire Wire Line 2700 4050 2400 4050 Wire Wire Line 2400 4050 2400 4300 Wire Wire Line 2700 4150 2400 4150 Connection ~ 2400 4150 Wire Wire Line 4450 2400 4450 2550 Wire Wire Line 4450 2550 3950 2550 Wire Wire Line 2300 2750 2650 2750 Wire Wire Line 950 2550 2650 2550 Wire Wire Line 1100 2750 1000 2750 Wire Wire Line 1000 2750 1000 2550 Connection ~ 1000 2550 Wire Wire Line 6200 2400 6350 2400 Wire Wire Line 6200 2500 6350 2500 Wire Wire Line 6350 2400 6350 4000 Wire Wire Line 6350 2600 6200 2600 Connection ~ 6350 2500 Wire Wire Line 5700 2800 5700 2900 Wire Wire Line 5700 2900 6350 2900 Connection ~ 6350 2600 Wire Wire Line 8100 1200 9000 1200 Wire Wire Line 8250 1100 8100 1100 Wire Wire Line 6750 2400 7400 2400 Wire Wire Line 6200 2000 6600 2000 Wire Wire Line 6950 2650 8250 2650 Wire Wire Line 8250 2650 8250 2400 Wire Wire Line 6200 1900 6700 1900 $Comp L Jumper_NO_Small JP1 U 1 1 59116B95 P 8700 1450 F 0 "JP1" H 8700 1530 50 0000 C CNN F 1 "USB Power" H 8710 1390 50 0000 C CNN F 2 "Pin_Headers:Pin_Header_Angled_1x02_Pitch2.54mm" H 8700 1450 50 0001 C CNN F 3 "" H 8700 1450 50 0001 C CNN 1 8700 1450 1 0 0 -1 $EndComp Wire Wire Line 9000 1450 8800 1450 Wire Wire Line 8600 1450 8350 1450 Wire Wire Line 8350 1450 8350 1300 Wire Wire Line 8350 1300 8100 1300 Text GLabel 7400 1400 0 60 Input ~ 0 KBD_READY Text GLabel 7400 1600 0 60 Output ~ 0 KBD_STROBE Text GLabel 7400 1700 0 60 Output ~ 0 OUT_RDA Text GLabel 7400 1500 0 60 Input ~ 0 OUT_DA Text GLabel 5200 1000 0 60 Output ~ 0 KBD_D0 Text GLabel 5200 1100 0 60 Output ~ 0 KBD_D1 Text GLabel 5200 1200 0 60 Output ~ 0 KBD_D2 Text GLabel 5200 1300 0 60 Output ~ 0 KBD_D3 Text GLabel 5200 1400 0 60 Output ~ 0 KBD_D4 Text GLabel 5200 1500 0 60 Output ~ 0 KBD_D5 Text GLabel 5200 1600 0 60 Output ~ 0 KBD_D6 Text GLabel 5200 1700 0 60 Output ~ 0 KBD_D7 Wire Wire Line 6750 2300 6750 3700 Wire Wire Line 6850 2300 7400 2300 Wire Wire Line 6850 2200 6850 3600 Wire Wire Line 6500 2100 6200 2100 Wire Wire Line 7050 2200 7400 2200 Wire Wire Line 7050 2000 7050 3000 Connection ~ 6950 2650 Connection ~ 6850 2300 Connection ~ 6750 2400 $Comp L R R2 U 1 1 59122A1C P 7750 2800 F 0 "R2" V 7830 2800 50 0000 C CNN F 1 "10k" V 7750 2800 50 0000 C CNN F 2 "Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 7680 2800 50 0001 C CNN F 3 "" H 7750 2800 50 0001 C CNN 1 7750 2800 0 1 1 0 $EndComp Text GLabel 8100 2800 2 60 Input ~ 0 VCC Wire Wire Line 7900 2800 8100 2800 Wire Wire Line 8000 3000 7900 3000 Wire Wire Line 8000 2800 8000 3000 Connection ~ 8000 2800 Wire Wire Line 7150 2100 7400 2100 Wire Wire Line 7150 2100 7150 3400 Wire Wire Line 7050 3000 7600 3000 Connection ~ 7050 2200 Wire Wire Line 8250 2400 8100 2400 Wire Wire Line 7150 3400 7550 3400 Wire Wire Line 6950 3500 7550 3500 Wire Wire Line 6850 3600 7550 3600 Wire Wire Line 6750 3700 7550 3700 Text Label 7350 3400 0 60 ~ 0 CS1 Text Label 7350 3500 0 60 ~ 0 SCK Text Label 7350 3600 0 60 ~ 0 MOSI Text Label 7350 3700 0 60 ~ 0 MISO Wire Wire Line 6350 1000 6200 1000 Connection ~ 8550 1200 NoConn ~ 6200 1400 NoConn ~ 6200 1500 NoConn ~ 8100 2300 NoConn ~ 8100 2200 NoConn ~ 8100 2100 NoConn ~ 8100 2000 NoConn ~ 8100 1900 NoConn ~ 8100 1800 NoConn ~ 8100 1700 NoConn ~ 8100 1600 NoConn ~ 8100 1500 NoConn ~ 8100 1400 NoConn ~ 8100 1000 NoConn ~ 7400 1200 NoConn ~ 7400 1300 NoConn ~ 5200 2600 Text GLabel 2650 1750 0 60 Input ~ 0 KBD_D7 Text GLabel 10600 5700 0 60 Output ~ 0 RX Text GLabel 10600 5600 0 60 Input ~ 0 TX Text GLabel 7400 1100 0 60 Input ~ 0 RX Text GLabel 7400 1000 0 60 Output ~ 0 TX $Comp L CONN_02X20 J4 U 1 1 593E9FED P 1800 6050 F 0 "J4" H 1800 7100 50 0000 C CNN F 1 "Peripheral Bus" V 1800 6050 50 0000 C CNN F 2 "Connectors:IDC_Header_Straight_40pins" H 1800 5100 50 0001 C CNN F 3 "" H 1800 5100 50 0001 C CNN 1 1800 6050 1 0 0 -1 $EndComp Text GLabel 8550 950 1 60 Output ~ 0 P_RESET Wire Wire Line 8550 950 8550 1200 Text GLabel 6350 1000 2 60 Input ~ 0 P_RESET $Comp L R R5 U 1 1 593EB3CA P 8850 1000 F 0 "R5" V 8930 1000 50 0000 C CNN F 1 "10k" V 8850 1000 50 0000 C CNN F 2 "Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 8780 1000 50 0001 C CNN F 3 "" H 8850 1000 50 0001 C CNN 1 8850 1000 -1 0 0 1 $EndComp Wire Wire Line 9400 1200 9600 1200 Text GLabel 8850 750 1 60 Input ~ 0 VCC Wire Wire Line 8850 750 8850 850 Wire Wire Line 8850 1150 8850 1200 Connection ~ 8850 1200 Text GLabel 2050 6800 2 60 Input ~ 0 P_RESET Text GLabel 1550 5900 0 60 Input ~ 0 OUT_D0 Text GLabel 1550 5800 0 60 Input ~ 0 OUT_D1 Text GLabel 1550 5700 0 60 Input ~ 0 OUT_D2 Text GLabel 1550 5600 0 60 Input ~ 0 OUT_D3 Text GLabel 1550 5500 0 60 Input ~ 0 OUT_D4 Text GLabel 1550 5400 0 60 Input ~ 0 OUT_D5 Text GLabel 1550 5300 0 60 Input ~ 0 OUT_D6 Text GLabel 1550 5200 0 60 Input ~ 0 OUT_DA Text GLabel 2750 7400 3 60 Output ~ 0 GND Wire Wire Line 2050 5100 2750 5100 Wire Wire Line 2750 7000 2050 7000 Wire Wire Line 2750 6500 2050 6500 Wire Wire Line 2750 6300 2050 6300 Wire Wire Line 2050 6100 2750 6100 Wire Wire Line 1550 6000 900 6000 Wire Wire Line 900 6000 900 7250 Wire Wire Line 900 7250 2750 7250 Text GLabel 2050 6600 2 60 Output ~ 0 OUT_DETECT Text GLabel 1550 7000 0 60 Output ~ 0 KBD_DETECT Text GLabel 1550 6800 0 60 Input ~ 0 KBD_D0 Wire Wire Line 2750 5100 2750 7400 Connection ~ 2750 7250 Connection ~ 2750 7000 Connection ~ 2750 6500 Connection ~ 2750 6300 Connection ~ 2750 6100 Text GLabel 1550 6700 0 60 Input ~ 0 KBD_D1 Text GLabel 1550 6600 0 60 Input ~ 0 KBD_D2 Text GLabel 1550 6500 0 60 Input ~ 0 KBD_D3 Text GLabel 1550 6400 0 60 Input ~ 0 KBD_D4 Text GLabel 1550 6300 0 60 Input ~ 0 KBD_D5 Text GLabel 1550 6200 0 60 Input ~ 0 KBD_D6 Text GLabel 1550 6100 0 60 Input ~ 0 KBD_D7 NoConn ~ 2050 6000 Text GLabel 2050 6700 2 60 Input ~ 0 OUT_RDA Text GLabel 1550 6900 0 60 Input ~ 0 KBD_READY Text GLabel 2050 6900 2 60 BiDi ~ 0 KBD_STROBE Text GLabel 4400 6150 0 60 Input ~ 0 OUT_DETECT Text GLabel 4400 6400 0 60 Input ~ 0 KBD_DETECT $Comp L R R1 U 1 1 593F467A P 4800 5750 F 0 "R1" V 4880 5750 50 0000 C CNN F 1 "10k" V 4800 5750 50 0000 C CNN F 2 "Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 4730 5750 50 0001 C CNN F 3 "" H 4800 5750 50 0001 C CNN 1 4800 5750 -1 0 0 1 $EndComp $Comp L R R4 U 1 1 593F475F P 5100 5750 F 0 "R4" V 5180 5750 50 0000 C CNN F 1 "10k" V 5100 5750 50 0000 C CNN F 2 "Resistors_THT:R_Axial_DIN0207_L6.3mm_D2.5mm_P10.16mm_Horizontal" V 5030 5750 50 0001 C CNN F 3 "" H 5100 5750 50 0001 C CNN 1 5100 5750 -1 0 0 1 $EndComp Text GLabel 4950 5300 1 60 Input ~ 0 VCC Wire Wire Line 4800 5600 4800 5500 Wire Wire Line 4800 5500 5100 5500 Wire Wire Line 4950 5500 4950 5300 Wire Wire Line 5100 5500 5100 5600 Connection ~ 4950 5500 Wire Wire Line 4800 5900 4800 6150 Wire Wire Line 4400 6150 5300 6150 Wire Wire Line 4400 6400 5300 6400 Wire Wire Line 5100 6400 5100 5900 Connection ~ 4800 6150 Connection ~ 5100 6400 Text GLabel 5300 6150 2 60 Output ~ 0 OUT_EN Text GLabel 5300 6400 2 60 Output ~ 0 KBD_EN Text GLabel 7400 1800 0 60 Input ~ 0 OUT_EN Text GLabel 7400 1900 0 60 Input ~ 0 KBD_EN Wire Wire Line 6750 2300 6400 2300 Wire Wire Line 6400 2300 6400 2200 Wire Wire Line 6400 2200 6200 2200 Wire Wire Line 6500 2100 6500 2200 Wire Wire Line 6500 2200 6850 2200 Wire Wire Line 6600 2000 6600 2100 Wire Wire Line 6600 2100 6950 2100 Wire Wire Line 6950 2100 6950 3500 Wire Wire Line 6700 1900 6700 2000 Wire Wire Line 6700 2000 7050 2000 $Comp L CONN_01X06 J3 U 1 1 593F9B4F P 7750 3650 F 0 "J3" H 7750 4000 50 0000 C CNN F 1 "SPI Breakout" V 7850 3650 50 0000 C CNN F 2 "Pin_Headers:Pin_Header_Angled_1x06_Pitch2.54mm" H 7750 3650 50 0001 C CNN F 3 "" H 7750 3650 50 0001 C CNN 1 7750 3650 1 0 0 -1 $EndComp Wire Wire Line 7150 2800 7600 2800 Connection ~ 7150 2800 Wire Wire Line 6350 3800 7550 3800 Connection ~ 6350 2900 Connection ~ 6350 3800 Text GLabel 7550 3900 0 60 Input ~ 0 VCC NoConn ~ 2050 6400 NoConn ~ 2050 5200 NoConn ~ 2050 5300 NoConn ~ 2050 5400 NoConn ~ 2050 5500 NoConn ~ 2050 5600 NoConn ~ 2050 5700 NoConn ~ 2050 5800 NoConn ~ 2050 5900 NoConn ~ 2050 6200 $Comp L C C4 U 1 1 5939B171 P 10875 1225 F 0 "C4" H 10900 1325 50 0000 L CNN F 1 "100nF" H 10900 1125 50 0000 L CNN F 2 "Capacitors_THT:C_Disc_D4.7mm_W2.5mm_P5.00mm" H 10913 1075 50 0001 C CNN F 3 "" H 10875 1225 50 0001 C CNN 1 10875 1225 1 0 0 -1 $EndComp Connection ~ 10025 975 Connection ~ 10025 1475 NoConn ~ 1550 5100 $Comp L D D1 U 1 1 5939CEAC P 9150 1450 F 0 "D1" H 9150 1550 50 0000 C CNN F 1 "1N4848" H 9150 1350 50 0000 C CNN F 2 "Diodes_THT:D_DO-35_SOD27_P7.62mm_Horizontal" H 9150 1450 50 0001 C CNN F 3 "" H 9150 1450 50 0001 C CNN 1 9150 1450 -1 0 0 1 $EndComp $EndSCHEMATC