EESchema Schematic File Version 4
EELAYER 26 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 1 1
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L Connector:Raspberry_Pi_2_3 J1
U 1 1 5C35F1BF
P 2500 2300
F 0 "J1" H 2500 3778 50  0000 C CNN
F 1 "Raspberry_Pi_2_3" H 2500 3687 50  0000 C CNN
F 2 "Connector_PinHeader_2.54mm:PinHeader_2x20_P2.54mm_Vertical" H 2500 2300 50  0001 C CNN
F 3 "https://www.raspberrypi.org/documentation/hardware/raspberrypi/schematics/rpi_SCH_3bplus_1p0_reduced.pdf" H 2500 2300 50  0001 C CNN
	1    2500 2300
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74HC245 U1
U 1 1 5C35F2D7
P 1950 5850
F 0 "U1" H 1950 6828 50  0000 C CNN
F 1 "74HC245" H 1950 6737 50  0000 C CNN
F 2 "" H 1950 5850 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74HC245" H 1950 5850 50  0001 C CNN
	1    1950 5850
	1    0    0    -1  
$EndComp
$Comp
L Analog_Switch:CD4051B U2
U 1 1 5C35F42C
P 4850 4600
F 0 "U2" H 4850 5478 50  0000 C CNN
F 1 "CD4051B" H 4850 5387 50  0000 C CNN
F 2 "" H 5000 3850 50  0001 L CNN
F 3 "http://www.ti.com/lit/ds/symlink/cd4052b.pdf" H 4830 4700 50  0001 C CNN
	1    4850 4600
	1    0    0    -1  
$EndComp
$Comp
L Interface_Expansion:MCP23017_SP U4
U 1 1 5C35F617
P 4800 2150
F 0 "U4" H 4800 3428 50  0000 C CNN
F 1 "MCP23017_SP" H 4800 3337 50  0000 C CNN
F 2 "Package_DIP:DIP-28_W7.62mm" H 5000 1150 50  0001 L CNN
F 3 "http://ww1.microchip.com/downloads/en/DeviceDoc/20001952C.pdf" H 5000 1050 50  0001 L CNN
	1    4800 2150
	1    0    0    -1  
$EndComp
$Comp
L 74xx:74LS138 U3
U 1 1 5C35F892
P 7800 1350
F 0 "U3" H 7800 2128 50  0000 C CNN
F 1 "74LS138" H 7800 2037 50  0000 C CNN
F 2 "" H 7800 1350 50  0001 C CNN
F 3 "http://www.ti.com/lit/gpn/sn74LS138" H 7800 1350 50  0001 C CNN
	1    7800 1350
	1    0    0    -1  
$EndComp
$EndSCHEMATC