EESchema Schematic File Version 4
EELAYER 30 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 5 28
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
Text GLabel 2450 2200 2    50   Input ~ 0
VOICE1_FREQ
Text GLabel 2450 2500 2    50   Input ~ 0
VOICE2_FREQ
Text GLabel 2450 2800 2    50   Input ~ 0
VOICE3_FREQ
Text GLabel 2450 2300 2    50   Input ~ 0
VOICE1_SHAPE
Text GLabel 2450 2600 2    50   Input ~ 0
VOICE2_SHAPE
Text GLabel 2450 2900 2    50   Input ~ 0
VOICE3_SHAPE
Text GLabel 2450 2400 2    50   Input ~ 0
VOICE1_PWM
Text GLabel 2450 2700 2    50   Input ~ 0
VOICE2_PWM
Text GLabel 2450 3000 2    50   Input ~ 0
VOICE3_PWM
Text GLabel 2450 3100 2    50   Input ~ 0
FILTER_CUTOFF
Text GLabel 2450 3200 2    50   Input ~ 0
FILTER_RESONANCE
$Comp
L dk_Interface-Analog-Switches-Multiplexers-Demultiplexers:CD74HC4067SM96 U?
U 1 1 5FBF3812
P 1850 2900
F 0 "U?" H 1800 3200 60  0000 C CNN
F 1 "CD74HC4067SM96" V 1800 2650 60  0000 C CNN
F 2 "digikey-footprints:SSOP-24_W5.30mm" H 2050 3100 60  0001 L CNN
F 3 "http://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=http%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fcd74hc4067" H 2050 3200 60  0001 L CNN
F 4 "296-9226-1-ND" H 2050 3300 60  0001 L CNN "Digi-Key_PN"
F 5 "CD74HC4067SM96" H 2050 3400 60  0001 L CNN "MPN"
F 6 "Integrated Circuits (ICs)" H 2050 3500 60  0001 L CNN "Category"
F 7 "Interface - Analog Switches, Multiplexers, Demultiplexers" H 2050 3600 60  0001 L CNN "Family"
F 8 "http://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=http%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Fcd74hc4067" H 2050 3700 60  0001 L CNN "DK_Datasheet_Link"
F 9 "/product-detail/en/texas-instruments/CD74HC4067SM96/296-9226-1-ND/376978" H 2050 3800 60  0001 L CNN "DK_Detail_Page"
F 10 "IC MUX/DEMUX 1X16 24SSOP" H 2050 3900 60  0001 L CNN "Description"
F 11 "Texas Instruments" H 2050 4000 60  0001 L CNN "Manufacturer"
F 12 "Active" H 2050 4100 60  0001 L CNN "Status"
	1    1850 2900
	-1   0    0    -1  
$EndComp
Text GLabel 2450 3300 2    50   Input ~ 0
ENV_ATTACK
Text GLabel 2450 3400 2    50   Input ~ 0
ENV_DECAY
Text GLabel 2450 3500 2    50   Input ~ 0
ENV_SUSTAIN
Text GLabel 2450 3600 2    50   Input ~ 0
ENV_RELEASE
NoConn ~ 2350 3700
Wire Wire Line
	2450 3600 2350 3600
Wire Wire Line
	2350 3500 2450 3500
Wire Wire Line
	2350 3400 2450 3400
Wire Wire Line
	2350 3300 2450 3300
Wire Wire Line
	2350 3100 2450 3100
Wire Wire Line
	2350 3200 2450 3200
Wire Wire Line
	2350 3000 2450 3000
Wire Wire Line
	2350 2800 2450 2800
Wire Wire Line
	2450 2700 2350 2700
Wire Wire Line
	2350 2900 2450 2900
Wire Wire Line
	2350 2600 2450 2600
Wire Wire Line
	2350 2500 2450 2500
Wire Wire Line
	2350 2400 2450 2400
Wire Wire Line
	2350 2300 2450 2300
Wire Wire Line
	2350 2200 2450 2200
Text GLabel 2500 1950 1    50   Input ~ 0
POTS_ADC
Wire Wire Line
	2500 1950 2500 2100
Wire Wire Line
	2500 2100 2350 2100
$Comp
L power:GND #PWR0154
U 1 1 5FBF382F
P 1850 4250
F 0 "#PWR0154" H 1850 4000 50  0001 C CNN
F 1 "GND" H 1855 4077 50  0000 C CNN
F 2 "" H 1850 4250 50  0001 C CNN
F 3 "" H 1850 4250 50  0001 C CNN
	1    1850 4250
	1    0    0    -1  
$EndComp
Wire Wire Line
	1850 4100 1850 4150
$Comp
L power:+3.3VA #PWR0155
U 1 1 5FBF3836
P 1850 1750
F 0 "#PWR0155" H 1850 1600 50  0001 C CNN
F 1 "+3.3VA" H 1865 1923 50  0000 C CNN
F 2 "" H 1850 1750 50  0001 C CNN
F 3 "" H 1850 1750 50  0001 C CNN
	1    1850 1750
	1    0    0    -1  
$EndComp
Wire Wire Line
	1850 1750 1850 1800
Text GLabel 1400 2300 0    50   Input ~ 0
POTS_S0_GPIO
Wire Wire Line
	1400 2300 1450 2300
Text GLabel 1400 2400 0    50   Input ~ 0
POTS_S1_GPIO
Text GLabel 1400 2500 0    50   Input ~ 0
POTS_S3_GPIO
Text GLabel 1400 2600 0    50   Input ~ 0
POTS_S2_GPIO
Wire Wire Line
	1400 2400 1450 2400
Wire Wire Line
	1400 2500 1450 2500
Wire Wire Line
	1400 2600 1450 2600
Wire Wire Line
	1850 4150 2450 4150
Wire Wire Line
	2450 4150 2450 3800
Wire Wire Line
	2450 3800 2350 3800
Connection ~ 1850 4150
Wire Wire Line
	1850 4150 1850 4250
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F2 "Out" I L 4350 1650 50 
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U 5FBF384D
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S 4350 3150 550  200 
U 5FBF3856
F0 "sheet5FBF37EF" 50
F1 "file5F82C835.sch" 50
F2 "Out" I L 4350 3250 50 
$EndSheet
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U 5FBF3859
F0 "sheet5FBF37F0" 50
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$EndSheet
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F1 "file5F82C835.sch" 50
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U 5FBF3862
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U 5FBF3865
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$Sheet
S 4350 5550 550  200 
U 5FBF3868
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Text GLabel 4250 1250 0    50   Input ~ 0
VOICE1_FREQ
Text GLabel 4250 1650 0    50   Input ~ 0
VOICE1_SHAPE
Text GLabel 4250 2050 0    50   Input ~ 0
VOICE1_PWM
Text GLabel 4250 2450 0    50   Input ~ 0
VOICE2_FREQ
Text GLabel 4250 2850 0    50   Input ~ 0
VOICE2_SHAPE
Text GLabel 4250 3250 0    50   Input ~ 0
VOICE2_PWM
Text GLabel 4250 3650 0    50   Input ~ 0
VOICE3_FREQ
Text GLabel 4250 4050 0    50   Input ~ 0
VOICE3_SHAPE
Text GLabel 4250 4450 0    50   Input ~ 0
VOICE3_PWM
Text GLabel 4250 4850 0    50   Input ~ 0
FILTER_CUTOFF
Text GLabel 4250 5250 0    50   Input ~ 0
FILTER_RESONANCE
Text GLabel 4250 5650 0    50   Input ~ 0
ENV_ATTACK
Text GLabel 4250 6050 0    50   Input ~ 0
ENV_DECAY
Text GLabel 4250 6450 0    50   Input ~ 0
ENV_SUSTAIN
Text GLabel 4250 6850 0    50   Input ~ 0
ENV_RELEASE
Wire Wire Line
	4250 1250 4350 1250
Wire Wire Line
	4250 1650 4350 1650
Wire Wire Line
	4250 2850 4350 2850
Wire Wire Line
	4250 3250 4350 3250
Wire Wire Line
	4250 3650 4350 3650
Wire Wire Line
	4250 4050 4350 4050
Wire Wire Line
	4250 4450 4350 4450
Wire Wire Line
	4350 4850 4250 4850
Wire Wire Line
	4250 5250 4350 5250
Wire Wire Line
	4250 5650 4350 5650
Wire Wire Line
	4250 6050 4350 6050
Wire Wire Line
	4250 6450 4350 6450
Wire Wire Line
	4250 6850 4350 6850
Wire Wire Line
	4250 2050 4350 2050
Wire Wire Line
	4250 2450 4350 2450
$EndSCHEMATC