EESchema Schematic File Version 4 EELAYER 30 0 EELAYER END $Descr A4 11693 8268 encoding utf-8 Sheet 4 4 Title "" Date "2020-10-03" Rev "" Comp "Macrocell" Comment1 "#followtheling" Comment2 "" Comment3 "" Comment4 "Input / Output" $EndDescr $Comp L Interface_UART:MAX485E U? U 1 1 5F846A22 P 8400 1950 F 0 "U?" H 8150 2400 50 0000 C CNN F 1 "MAX485E" H 8600 1400 50 0000 C CNN F 2 "" H 8400 1250 50 0001 C CNN F 3 "https://datasheets.maximintegrated.com/en/ds/MAX1487E-MAX491E.pdf" H 8400 2000 50 0001 C CNN 1 8400 1950 1 0 0 -1 $EndComp $Comp L Device:R R? U 1 1 5F78D28A P 9100 2000 F 0 "R?" H 9170 2046 50 0000 L CNN F 1 "DNP" H 9170 1955 50 0000 L CNN F 2 "" V 9030 2000 50 0001 C CNN F 3 "~" H 9100 2000 50 0001 C CNN 1 9100 2000 1 0 0 -1 $EndComp Wire Wire Line 8800 1850 8900 1850 Wire Wire Line 8900 1850 8900 1750 Wire Wire Line 8900 1750 9100 1750 Wire Wire Line 9100 2150 9100 2250 Wire Wire Line 9100 2250 8900 2250 Wire Wire Line 8900 2250 8900 2150 Wire Wire Line 8900 2150 8800 2150 Connection ~ 9100 2250 Wire Wire Line 9100 1850 9100 1750 Connection ~ 9100 1750 Text HLabel 7800 1850 0 50 Output ~ 0 DMX_RO Text HLabel 7800 1950 0 50 Input ~ 0 DMX_RE Text HLabel 7800 2150 0 50 Input ~ 0 DMX_DI Text HLabel 7800 2050 0 50 Input ~ 0 DMX_DE Wire Wire Line 7800 1850 8000 1850 Wire Wire Line 7800 1950 8000 1950 Wire Wire Line 7800 2050 8000 2050 Wire Wire Line 7800 2150 8000 2150 $Comp L Connector:Screw_Terminal_01x03 J? U 1 1 5F7904F0 P 10500 1850 F 0 "J?" H 10580 1892 50 0000 L CNN F 1 "DMX-IN" H 10580 1801 50 0000 L CNN F 2 "" H 10500 1850 50 0001 C CNN F 3 "~" H 10500 1850 50 0001 C CNN 1 10500 1850 1 0 0 -1 $EndComp Wire Wire Line 9100 1750 9800 1750 Wire Wire Line 9400 2250 9400 1850 Wire Wire Line 9400 1850 9700 1850 Wire Wire Line 9100 2250 9400 2250 Wire Wire Line 10300 1950 10200 1950 Wire Wire Line 10200 1950 10200 2050 $Comp L power:GND #PWR? U 1 1 5F7934F5 P 10200 2050 F 0 "#PWR?" H 10200 1800 50 0001 C CNN F 1 "GND" H 10205 1877 50 0000 C CNN F 2 "" H 10200 2050 50 0001 C CNN F 3 "" H 10200 2050 50 0001 C CNN 1 10200 2050 1 0 0 -1 $EndComp $Comp L Connector:Screw_Terminal_01x03 J? U 1 1 5F793A79 P 10500 2500 F 0 "J?" H 10580 2542 50 0000 L CNN F 1 "DMX-OUT" H 10580 2451 50 0000 L CNN F 2 "" H 10500 2500 50 0001 C CNN F 3 "~" H 10500 2500 50 0001 C CNN 1 10500 2500 1 0 0 -1 $EndComp Wire Wire Line 10300 2600 10200 2600 Wire Wire Line 10200 2600 10200 2700 $Comp L power:GND #PWR? U 1 1 5F7944DB P 10200 2700 F 0 "#PWR?" H 10200 2450 50 0001 C CNN F 1 "GND" H 10205 2527 50 0000 C CNN F 2 "" H 10200 2700 50 0001 C CNN F 3 "" H 10200 2700 50 0001 C CNN 1 10200 2700 1 0 0 -1 $EndComp $Comp L Device:R R? U 1 1 5F794BC2 P 10050 2400 F 0 "R?" V 10100 2550 50 0000 C CNN F 1 "0" V 10050 2400 50 0000 C CNN F 2 "" V 9980 2400 50 0001 C CNN F 3 "~" H 10050 2400 50 0001 C CNN 1 10050 2400 0 1 1 0 $EndComp $Comp L Device:R R? U 1 1 5F79524D P 10050 2500 F 0 "R?" V 10100 2650 50 0000 C CNN F 1 "0" V 10050 2500 50 0000 C CNN F 2 "" V 9980 2500 50 0001 C CNN F 3 "~" H 10050 2500 50 0001 C CNN 1 10050 2500 0 1 1 0 $EndComp Wire Wire Line 10200 2400 10300 2400 Wire Wire Line 10300 2500 10200 2500 Wire Wire Line 9900 2400 9800 2400 Wire Wire Line 9800 2400 9800 1750 Connection ~ 9800 1750 Wire Wire Line 9800 1750 10300 1750 Wire Wire Line 9900 2500 9700 2500 Wire Wire Line 9700 2500 9700 1850 Connection ~ 9700 1850 Wire Wire Line 9700 1850 10300 1850 Text Label 9400 1750 0 50 ~ 0 DMXL Text Label 9400 1850 0 50 ~ 0 DMXH $Comp L Connector:Screw_Terminal_01x04 J? U 1 1 5F79C1C7 P 9800 4850 F 0 "J?" H 9880 4842 50 0000 L CNN F 1 "WS-0" H 9880 4751 50 0000 L CNN F 2 "" H 9800 4850 50 0001 C CNN F 3 "~" H 9800 4850 50 0001 C CNN 1 9800 4850 1 0 0 -1 $EndComp $Comp L Connector:Screw_Terminal_01x04 J? U 1 1 5F79C92B P 9800 5350 F 0 "J?" H 9880 5342 50 0000 L CNN F 1 "WS-1" H 9880 5251 50 0000 L CNN F 2 "" H 9800 5350 50 0001 C CNN F 3 "~" H 9800 5350 50 0001 C CNN 1 9800 5350 1 0 0 -1 $EndComp Wire Wire Line 9600 5550 9500 5550 Wire Wire Line 9500 5550 9500 5050 Wire Wire Line 9500 5050 9600 5050 Wire Wire Line 9600 5450 9400 5450 Wire Wire Line 9400 5450 9400 4950 Wire Wire Line 9400 4950 9600 4950 Wire Wire Line 9500 5550 9500 5650 Connection ~ 9500 5550 Wire Wire Line 9400 4950 9400 4650 Connection ~ 9400 4950 $Comp L power:GND #PWR? U 1 1 5F79F898 P 9500 5650 F 0 "#PWR?" H 9500 5400 50 0001 C CNN F 1 "GND" H 9505 5477 50 0000 C CNN F 2 "" H 9500 5650 50 0001 C CNN F 3 "" H 9500 5650 50 0001 C CNN 1 9500 5650 1 0 0 -1 $EndComp Wire Wire Line 9600 4750 8800 4750 Wire Wire Line 9600 4850 9100 4850 Wire Wire Line 9600 5250 9100 5250 Wire Wire Line 9600 5350 8800 5350 Text HLabel 8800 4750 0 50 Input ~ 0 WS0_TX Text HLabel 8800 5350 0 50 Output ~ 0 WS1_RX $Comp L Device:R R? U 1 1 5F7A18C0 P 9100 5050 F 0 "R?" H 9170 5096 50 0000 L CNN F 1 "0" H 9170 5005 50 0000 L CNN F 2 "" V 9030 5050 50 0001 C CNN F 3 "~" H 9100 5050 50 0001 C CNN 1 9100 5050 1 0 0 -1 $EndComp Wire Wire Line 9100 4900 9100 4850 Connection ~ 9100 4850 Wire Wire Line 9100 4850 8800 4850 Wire Wire Line 9100 5200 9100 5250 Connection ~ 9100 5250 Wire Wire Line 9100 5250 8800 5250 Text HLabel 8800 5250 0 50 Input ~ 0 WS1_TX Text HLabel 8800 4850 0 50 Output ~ 0 WS0_RX $Comp L Interface_USB:CH340G U? U 1 1 5F7AA7E3 P 5550 2000 F 0 "U?" H 5300 2550 50 0000 C CNN F 1 "CH340G/C" H 5750 1450 50 0000 C CNN F 2 "Package_SO:SOIC-16_3.9x9.9mm_P1.27mm" H 5600 1450 50 0001 L CNN F 3 "http://www.datasheet5.com/pdf-local-2195953" H 5200 2800 50 0001 C CNN 1 5550 2000 1 0 0 -1 $EndComp $Comp L Connector:USB_B_Micro J? U 1 1 5F7ABAAB P 1000 2100 F 0 "J?" H 1057 2567 50 0000 C CNN F 1 "USB" H 1057 2476 50 0000 C CNN F 2 "" H 1150 2050 50 0001 C CNN F 3 "~" H 1150 2050 50 0001 C CNN 1 1000 2100 1 0 0 -1 $EndComp Wire Wire Line 1400 1900 1300 1900 Wire Wire Line 1700 1900 1800 1900 $Comp L Device:R R? U 1 1 5F7AF577 P 1550 2100 F 0 "R?" V 1500 2250 50 0000 C CNN F 1 "0" V 1550 2100 50 0000 C CNN F 2 "" V 1480 2100 50 0001 C CNN F 3 "~" H 1550 2100 50 0001 C CNN 1 1550 2100 0 1 1 0 $EndComp $Comp L Device:R R? U 1 1 5F7AFBC7 P 1550 2200 F 0 "R?" V 1500 2350 50 0000 C CNN F 1 "0" V 1550 2200 50 0000 C CNN F 2 "" V 1480 2200 50 0001 C CNN F 3 "~" H 1550 2200 50 0001 C CNN 1 1550 2200 0 1 1 0 $EndComp Wire Wire Line 1300 2100 1400 2100 Wire Wire Line 1300 2200 1400 2200 Wire Wire Line 900 2500 900 2600 Wire Wire Line 900 2600 950 2600 Wire Wire Line 1000 2600 1000 2500 Wire Wire Line 950 2600 950 2700 Connection ~ 950 2600 Wire Wire Line 950 2600 1000 2600 $Comp L power:GND #PWR? U 1 1 5F7B6FBF P 950 2700 F 0 "#PWR?" H 950 2450 50 0001 C CNN F 1 "GND" H 955 2527 50 0000 C CNN F 2 "" H 950 2700 50 0001 C CNN F 3 "" H 950 2700 50 0001 C CNN 1 950 2700 1 0 0 -1 $EndComp $Comp L Device:Crystal Y? U 1 1 5F7B8331 P 4200 2300 F 0 "Y?" V 4154 2431 50 0000 L CNN F 1 "12M" V 4245 2431 50 0000 L CNN F 2 "" H 4200 2300 50 0001 C CNN F 3 "~" H 4200 2300 50 0001 C CNN 1 4200 2300 0 1 1 0 $EndComp $Comp L Device:C C? U 1 1 5F7B9DAD P 3950 2550 F 0 "C?" V 4100 2550 50 0000 C CNN F 1 "20p" V 3789 2550 50 0000 C CNN F 2 "" H 3988 2400 50 0001 C CNN F 3 "~" H 3950 2550 50 0001 C CNN 1 3950 2550 0 1 -1 0 $EndComp $Comp L Device:C C? U 1 1 5F7BD5C2 P 3950 2050 F 0 "C?" V 4100 2050 50 0000 C CNN F 1 "20p" V 3789 2050 50 0000 C CNN F 2 "" H 3988 1900 50 0001 C CNN F 3 "~" H 3950 2050 50 0001 C CNN 1 3950 2050 0 1 1 0 $EndComp Wire Wire Line 4100 2050 4200 2050 Wire Wire Line 4200 2050 4200 2150 Wire Wire Line 4200 2450 4200 2550 Wire Wire Line 4200 2550 4100 2550 Wire Wire Line 5150 2400 4650 2400 Wire Wire Line 4650 2400 4650 2550 Wire Wire Line 4650 2550 4200 2550 Connection ~ 4200 2550 Wire Wire Line 5150 2200 4650 2200 Wire Wire Line 4650 2200 4650 2050 Wire Wire Line 4650 2050 4200 2050 Connection ~ 4200 2050 Wire Wire Line 3800 2050 3700 2050 Wire Wire Line 3700 2050 3700 2300 Wire Wire Line 3700 2550 3800 2550 Wire Wire Line 3700 2300 3600 2300 Connection ~ 3700 2300 Wire Wire Line 3700 2300 3700 2550 $Comp L power:GND #PWR? U 1 1 5F7CC94D P 3600 2300 F 0 "#PWR?" H 3600 2050 50 0001 C CNN F 1 "GND" V 3605 2172 50 0000 R CNN F 2 "" H 3600 2300 50 0001 C CNN F 3 "" H 3600 2300 50 0001 C CNN 1 3600 2300 0 1 1 0 $EndComp Wire Notes Line 4550 1800 3300 1800 Wire Notes Line 3300 1800 3300 2800 Wire Notes Line 3300 2800 4550 2800 Wire Notes Line 4550 2800 4550 1800 Text Notes 3350 2000 0 50 ~ 0 Only for\nCH340G Text Notes 4200 2000 0 50 ~ 0 DNP for\nCH340C Wire Wire Line 5150 2000 4750 2000 Text Label 4750 1900 0 50 ~ 0 USB_DP Wire Wire Line 4750 1900 5150 1900 Text Label 4750 2000 0 50 ~ 0 USB_DM Wire Wire Line 1700 2100 2100 2100 Text Label 2100 2100 2 50 ~ 0 USB_DP Wire Wire Line 2100 2200 1700 2200 Text Label 2100 2200 2 50 ~ 0 USB_DM Wire Wire Line 5550 2600 5550 2700 $Comp L power:GND #PWR? U 1 1 5F7EE5AE P 5550 2700 F 0 "#PWR?" H 5550 2450 50 0001 C CNN F 1 "GND" H 5555 2527 50 0000 C CNN F 2 "" H 5550 2700 50 0001 C CNN F 3 "" H 5550 2700 50 0001 C CNN 1 5550 2700 1 0 0 -1 $EndComp $Comp L power:+3V3 #PWR? U 1 1 5F7F16A8 P 5500 1200 F 0 "#PWR?" H 5500 1050 50 0001 C CNN F 1 "+3V3" H 5515 1373 50 0000 C CNN F 2 "" H 5500 1200 50 0001 C CNN F 3 "" H 5500 1200 50 0001 C CNN 1 5500 1200 1 0 0 -1 $EndComp Wire Wire Line 5500 1200 5500 1300 Wire Wire Line 5500 1300 5450 1300 Wire Wire Line 5450 1300 5450 1400 Wire Wire Line 5500 1300 5550 1300 Wire Wire Line 5550 1300 5550 1400 Connection ~ 5500 1300 Wire Wire Line 5950 1600 6300 1600 Wire Wire Line 5950 1700 6300 1700 Text HLabel 6300 1600 2 50 Output ~ 0 USB_UART_IN Text HLabel 6300 1700 2 50 Input ~ 0 USB_UART_OUT Wire Wire Line 5950 2300 6300 2300 Text HLabel 6300 2300 2 50 Output ~ 0 USB_UART_DTR NoConn ~ 5950 1900 NoConn ~ 5950 2000 NoConn ~ 5950 2100 NoConn ~ 5950 2200 NoConn ~ 5950 2400 NoConn ~ 5150 1700 $Comp L Device:D_Schottky D? U 1 1 5F853296 P 1550 1900 F 0 "D?" H 1550 1684 50 0000 C CNN F 1 "Schottky" H 1550 1775 50 0000 C CNN F 2 "" H 1550 1900 50 0001 C CNN F 3 "~" H 1550 1900 50 0001 C CNN 1 1550 1900 -1 0 0 1 $EndComp Wire Wire Line 1800 1900 2000 1900 $Comp L Device:Fuse F? U 1 1 5F857219 P 2150 1900 F 0 "F?" V 1953 1900 50 0000 C CNN F 1 "2A" V 2044 1900 50 0000 C CNN F 2 "" V 2080 1900 50 0001 C CNN F 3 "~" H 2150 1900 50 0001 C CNN 1 2150 1900 0 1 1 0 $EndComp Wire Wire Line 2300 1900 2400 1900 Wire Wire Line 2400 1900 2400 1800 $Comp L Connector:Screw_Terminal_01x02 J? U 1 1 5F876E47 P 850 1400 F 0 "J?" H 768 1075 50 0000 C CNN F 1 "Power" H 768 1166 50 0000 C CNN F 2 "" H 850 1400 50 0001 C CNN F 3 "~" H 850 1400 50 0001 C CNN 1 850 1400 -1 0 0 1 $EndComp Text Label 1800 1900 0 50 ~ 0 VIN Connection ~ 1800 1900 Wire Wire Line 1050 1400 1800 1400 Wire Wire Line 1800 1400 1800 1900 Wire Wire Line 1050 1300 1800 1300 $Comp L power:GND #PWR? U 1 1 5F8B42B2 P 1800 1300 F 0 "#PWR?" H 1800 1050 50 0001 C CNN F 1 "GND" V 1805 1172 50 0000 R CNN F 2 "" H 1800 1300 50 0001 C CNN F 3 "" H 1800 1300 50 0001 C CNN 1 1800 1300 0 -1 -1 0 $EndComp $Comp L power:+5V #PWR? U 1 1 5F8B4A28 P 2400 1800 F 0 "#PWR?" H 2400 1650 50 0001 C CNN F 1 "+5V" H 2415 1973 50 0000 C CNN F 2 "" H 2400 1800 50 0001 C CNN F 3 "" H 2400 1800 50 0001 C CNN 1 2400 1800 1 0 0 -1 $EndComp $Comp L power:+5V #PWR? U 1 1 5F8B5D26 P 9400 4650 F 0 "#PWR?" H 9400 4500 50 0001 C CNN F 1 "+5V" H 9415 4823 50 0000 C CNN F 2 "" H 9400 4650 50 0001 C CNN F 3 "" H 9400 4650 50 0001 C CNN 1 9400 4650 1 0 0 -1 $EndComp $Comp L power:+5V #PWR? U 1 1 5F8B64D4 P 8400 1350 F 0 "#PWR?" H 8400 1200 50 0001 C CNN F 1 "+5V" H 8415 1523 50 0000 C CNN F 2 "" H 8400 1350 50 0001 C CNN F 3 "" H 8400 1350 50 0001 C CNN 1 8400 1350 1 0 0 -1 $EndComp Wire Wire Line 8400 1350 8400 1450 Wire Wire Line 8400 2550 8400 2650 $Comp L power:GND #PWR? U 1 1 5F8BC4E7 P 8400 2650 F 0 "#PWR?" H 8400 2400 50 0001 C CNN F 1 "GND" H 8405 2477 50 0000 C CNN F 2 "" H 8400 2650 50 0001 C CNN F 3 "" H 8400 2650 50 0001 C CNN 1 8400 2650 1 0 0 -1 $EndComp NoConn ~ 1300 2300 $Comp L Connector:Screw_Terminal_01x03 J? U 1 1 5F8DE004 P 1100 4300 F 0 "J?" H 1018 3975 50 0000 C CNN F 1 "AUDIO-IN" H 1018 4066 50 0000 C CNN F 2 "" H 1100 4300 50 0001 C CNN F 3 "~" H 1100 4300 50 0001 C CNN 1 1100 4300 -1 0 0 1 $EndComp $Comp L Connector:AudioJack3 J? U 1 1 5F8DF7AD P 1300 5000 F 0 "J?" H 1020 4933 50 0000 R CNN F 1 "AUDIO-IN" H 1020 5024 50 0000 R CNN F 2 "" H 1300 5000 50 0001 C CNN F 3 "~" H 1300 5000 50 0001 C CNN 1 1300 5000 1 0 0 1 $EndComp Wire Wire Line 1500 5100 1600 5100 Wire Wire Line 1600 5100 1600 5200 $Comp L power:GND #PWR? U 1 1 5F8E3C62 P 1600 5200 F 0 "#PWR?" H 1600 4950 50 0001 C CNN F 1 "GND" H 1605 5027 50 0000 C CNN F 2 "" H 1600 5200 50 0001 C CNN F 3 "" H 1600 5200 50 0001 C CNN 1 1600 5200 1 0 0 -1 $EndComp Wire Wire Line 1300 4400 1400 4400 Wire Wire Line 1400 4400 1400 4500 $Comp L power:GND #PWR? U 1 1 5F8ED51F P 1400 4500 F 0 "#PWR?" H 1400 4250 50 0001 C CNN F 1 "GND" H 1405 4327 50 0000 C CNN F 2 "" H 1400 4500 50 0001 C CNN F 3 "" H 1400 4500 50 0001 C CNN 1 1400 4500 1 0 0 -1 $EndComp Wire Wire Line 1300 4200 1750 4200 Text Label 1750 4200 2 50 ~ 0 AUDIO_IN_L Text Label 1750 4300 2 50 ~ 0 AUDIO_IN_R Wire Wire Line 1750 4300 1300 4300 $Comp L Device:R R? U 1 1 5F7A5219 P 3550 4550 F 0 "R?" V 3650 4550 50 0000 C CNN F 1 "10k" V 3550 4550 50 0000 C CNN F 2 "" V 3480 4550 50 0001 C CNN F 3 "~" H 3550 4550 50 0001 C CNN 1 3550 4550 0 1 1 0 $EndComp $Comp L Device:R R? U 1 1 5F7A5A42 P 3800 4800 F 0 "R?" H 3870 4846 50 0000 L CNN F 1 "10k" H 3870 4755 50 0000 L CNN F 2 "" V 3730 4800 50 0001 C CNN F 3 "~" H 3800 4800 50 0001 C CNN 1 3800 4800 1 0 0 -1 $EndComp $Comp L Device:C C? U 1 1 5F7AA6CA P 3150 4350 F 0 "C?" V 2898 4350 50 0000 C CNN F 1 "1u" V 2989 4350 50 0000 C CNN F 2 "" H 3188 4200 50 0001 C CNN F 3 "~" H 3150 4350 50 0001 C CNN 1 3150 4350 0 1 1 0 $EndComp Wire Wire Line 3800 4650 3800 4550 Wire Wire Line 3800 4550 3700 4550 Wire Wire Line 3800 4550 3900 4550 Connection ~ 3800 4550 $Comp L Device:R R? U 1 1 5F7CBEDB P 4200 4050 F 0 "R?" V 4300 4050 50 0000 C CNN F 1 "10k" V 4200 4050 50 0000 C CNN F 2 "" V 4130 4050 50 0001 C CNN F 3 "~" H 4200 4050 50 0001 C CNN 1 4200 4050 0 1 -1 0 $EndComp Wire Wire Line 3900 4350 3800 4350 Wire Wire Line 3800 4350 3800 4050 Wire Wire Line 3800 4050 4050 4050 Wire Wire Line 4350 4050 4600 4050 Wire Wire Line 4600 4050 4600 4450 Wire Wire Line 4600 4450 4500 4450 $Comp L Device:R R? U 1 1 5F7D8A7B P 3550 4350 F 0 "R?" V 3650 4350 50 0000 C CNN F 1 "10k" V 3550 4350 50 0000 C CNN F 2 "" V 3480 4350 50 0001 C CNN F 3 "~" H 3550 4350 50 0001 C CNN 1 3550 4350 0 1 1 0 $EndComp Wire Wire Line 3700 4350 3800 4350 Connection ~ 3800 4350 Wire Wire Line 3300 4350 3400 4350 Wire Wire Line 3300 4550 3400 4550 $Comp L power:GND #PWR? U 1 1 5F7E6BF4 P 3800 5050 F 0 "#PWR?" H 3800 4800 50 0001 C CNN F 1 "GND" H 3805 4877 50 0000 C CNN F 2 "" H 3800 5050 50 0001 C CNN F 3 "" H 3800 5050 50 0001 C CNN 1 3800 5050 1 0 0 -1 $EndComp Wire Wire Line 3800 5050 3800 4950 Wire Wire Line 2250 4350 2800 4350 Text Label 2250 4350 0 50 ~ 0 AUDIO_IN_L $Comp L power:VDDA #PWR? U 1 1 5F801221 P 3300 4550 F 0 "#PWR?" H 3300 4400 50 0001 C CNN F 1 "VDDA" V 3318 4678 50 0000 L CNN F 2 "" H 3300 4550 50 0001 C CNN F 3 "" H 3300 4550 50 0001 C CNN 1 3300 4550 0 -1 -1 0 $EndComp $Comp L power:GND #PWR? U 1 1 5F80CE85 P 1400 7000 F 0 "#PWR?" H 1400 6750 50 0001 C CNN F 1 "GND" H 1405 6827 50 0000 C CNN F 2 "" H 1400 7000 50 0001 C CNN F 3 "" H 1400 7000 50 0001 C CNN 1 1400 7000 1 0 0 -1 $EndComp $Comp L power:VDDA #PWR? U 1 1 5F80D8A2 P 1400 6200 F 0 "#PWR?" H 1400 6050 50 0001 C CNN F 1 "VDDA" H 1417 6373 50 0000 C CNN F 2 "" H 1400 6200 50 0001 C CNN F 3 "" H 1400 6200 50 0001 C CNN 1 1400 6200 1 0 0 -1 $EndComp Wire Wire Line 1400 6200 1400 6300 Wire Wire Line 1400 6900 1400 7000 Wire Wire Line 1500 4900 1950 4900 Text Label 1950 4900 2 50 ~ 0 AUDIO_IN_L Text Label 1950 5000 2 50 ~ 0 AUDIO_IN_R Wire Wire Line 1950 5000 1500 5000 Text HLabel 4700 4450 2 50 Output ~ 0 AUDIO_L Wire Wire Line 4700 4450 4600 4450 Connection ~ 4600 4450 $Comp L Device:R R? U 1 1 5F849CCA P 3550 6100 F 0 "R?" V 3650 6100 50 0000 C CNN F 1 "10k" V 3550 6100 50 0000 C CNN F 2 "" V 3480 6100 50 0001 C CNN F 3 "~" H 3550 6100 50 0001 C CNN 1 3550 6100 0 1 1 0 $EndComp $Comp L Device:R R? U 1 1 5F849CD4 P 3800 6350 F 0 "R?" H 3870 6396 50 0000 L CNN F 1 "10k" H 3870 6305 50 0000 L CNN F 2 "" V 3730 6350 50 0001 C CNN F 3 "~" H 3800 6350 50 0001 C CNN 1 3800 6350 1 0 0 -1 $EndComp $Comp L Device:C C? U 1 1 5F849CDE P 3150 5900 F 0 "C?" V 2898 5900 50 0000 C CNN F 1 "1u" V 2989 5900 50 0000 C CNN F 2 "" H 3188 5750 50 0001 C CNN F 3 "~" H 3150 5900 50 0001 C CNN 1 3150 5900 0 1 1 0 $EndComp Wire Wire Line 3800 6200 3800 6100 Wire Wire Line 3800 6100 3700 6100 Wire Wire Line 3800 6100 3900 6100 Connection ~ 3800 6100 $Comp L Device:R R? U 1 1 5F849CEC P 4200 5600 F 0 "R?" V 4300 5600 50 0000 C CNN F 1 "10k" V 4200 5600 50 0000 C CNN F 2 "" V 4130 5600 50 0001 C CNN F 3 "~" H 4200 5600 50 0001 C CNN 1 4200 5600 0 1 -1 0 $EndComp Wire Wire Line 3900 5900 3800 5900 Wire Wire Line 3800 5900 3800 5600 Wire Wire Line 3800 5600 4050 5600 Wire Wire Line 4350 5600 4600 5600 Wire Wire Line 4600 5600 4600 6000 Wire Wire Line 4600 6000 4500 6000 $Comp L Device:R R? U 1 1 5F849CFC P 3550 5900 F 0 "R?" V 3650 5900 50 0000 C CNN F 1 "10k" V 3550 5900 50 0000 C CNN F 2 "" V 3480 5900 50 0001 C CNN F 3 "~" H 3550 5900 50 0001 C CNN 1 3550 5900 0 1 1 0 $EndComp Wire Wire Line 3700 5900 3800 5900 Connection ~ 3800 5900 Wire Wire Line 3300 5900 3400 5900 Wire Wire Line 3300 6100 3400 6100 $Comp L power:GND #PWR? U 1 1 5F849D0A P 3800 6600 F 0 "#PWR?" H 3800 6350 50 0001 C CNN F 1 "GND" H 3805 6427 50 0000 C CNN F 2 "" H 3800 6600 50 0001 C CNN F 3 "" H 3800 6600 50 0001 C CNN 1 3800 6600 1 0 0 -1 $EndComp Wire Wire Line 3800 6600 3800 6500 $Comp L power:VDDA #PWR? U 1 1 5F849D17 P 3300 6100 F 0 "#PWR?" H 3300 5950 50 0001 C CNN F 1 "VDDA" V 3318 6228 50 0000 L CNN F 2 "" H 3300 6100 50 0001 C CNN F 3 "" H 3300 6100 50 0001 C CNN 1 3300 6100 0 -1 -1 0 $EndComp Text HLabel 4700 6000 2 50 Output ~ 0 AUDIO_R Wire Wire Line 4700 6000 4600 6000 Connection ~ 4600 6000 $Comp L Amplifier_Operational:LM358 U? U 1 1 5F8649CA P 4200 4450 F 0 "U?" H 4200 4750 50 0000 C CNN F 1 "LM358" H 4250 4650 50 0000 C CNN F 2 "" H 4200 4450 50 0001 C CNN F 3 "http://www.ti.com/lit/ds/symlink/lm2904-n.pdf" H 4200 4450 50 0001 C CNN 1 4200 4450 1 0 0 -1 $EndComp $Comp L Amplifier_Operational:LM358 U? U 2 1 5F8689C1 P 4200 6000 F 0 "U?" H 4200 6300 50 0000 C CNN F 1 "LM358" H 4250 6200 50 0000 C CNN F 2 "" H 4200 6000 50 0001 C CNN F 3 "http://www.ti.com/lit/ds/symlink/lm2904-n.pdf" H 4200 6000 50 0001 C CNN 2 4200 6000 1 0 0 -1 $EndComp $Comp L Amplifier_Operational:LM358 U? U 3 1 5F86A645 P 1500 6600 F 0 "U?" H 1458 6646 50 0000 L CNN F 1 "LM358" H 1458 6555 50 0000 L CNN F 2 "" H 1500 6600 50 0001 C CNN F 3 "http://www.ti.com/lit/ds/symlink/lm2904-n.pdf" H 1500 6600 50 0001 C CNN 3 1500 6600 1 0 0 -1 $EndComp Text Notes 3500 7100 0 50 ~ 0 TODO: Set sensible\ngain for input stage. $Comp L Device:R R? U 1 1 5F7C2195 P 2800 4600 F 0 "R?" H 2600 4650 50 0000 L CNN F 1 "47k" H 2600 4550 50 0000 L CNN F 2 "" V 2730 4600 50 0001 C CNN F 3 "~" H 2800 4600 50 0001 C CNN 1 2800 4600 1 0 0 -1 $EndComp Wire Wire Line 2800 4450 2800 4350 Connection ~ 2800 4350 Wire Wire Line 2800 4350 3000 4350 $Comp L power:GND #PWR? U 1 1 5F7DF715 P 2800 5050 F 0 "#PWR?" H 2800 4800 50 0001 C CNN F 1 "GND" H 2805 4877 50 0000 C CNN F 2 "" H 2800 5050 50 0001 C CNN F 3 "" H 2800 5050 50 0001 C CNN 1 2800 5050 1 0 0 -1 $EndComp Wire Wire Line 2800 5050 2800 4750 Wire Wire Line 2250 5900 2800 5900 Text Label 2250 5900 0 50 ~ 0 AUDIO_IN_R $Comp L Device:R R? U 1 1 5F7F1A27 P 2800 6150 F 0 "R?" H 2600 6200 50 0000 L CNN F 1 "47k" H 2600 6100 50 0000 L CNN F 2 "" V 2730 6150 50 0001 C CNN F 3 "~" H 2800 6150 50 0001 C CNN 1 2800 6150 1 0 0 -1 $EndComp Wire Wire Line 2800 6000 2800 5900 Connection ~ 2800 5900 Wire Wire Line 2800 5900 3000 5900 $Comp L power:GND #PWR? U 1 1 5F7F1A34 P 2800 6600 F 0 "#PWR?" H 2800 6350 50 0001 C CNN F 1 "GND" H 2805 6427 50 0000 C CNN F 2 "" H 2800 6600 50 0001 C CNN F 3 "" H 2800 6600 50 0001 C CNN 1 2800 6600 1 0 0 -1 $EndComp Wire Wire Line 2800 6600 2800 6300 $EndSCHEMATC