EESchema Schematic File Version 2 LIBS:power LIBS:device LIBS:switches LIBS:relays LIBS:motors 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:lts LIBS:lts-proto-cache EELAYER 25 0 EELAYER END $Descr USLetter 11000 8500 encoding utf-8 Sheet 1 3 Title "LTS Prototype" Date "2018-02-06" Rev "AA" Comp "Let's Talk Science" Comment1 "Shawn Nock " Comment2 "" Comment3 "" Comment4 "" $EndDescr Text Notes 7700 2200 0 60 ~ 0 LED Array Face Wire Wire Line 9650 2400 10150 2400 Connection ~ 10050 2400 Connection ~ 9950 2400 Connection ~ 9850 2400 Connection ~ 9750 2400 $Comp L GND #PWR01 U 1 1 5A7A186C P 9900 2400 F 0 "#PWR01" H 9900 2150 50 0001 C CNN F 1 "GND" H 9900 2250 50 0000 C CNN F 2 "" H 9900 2400 50 0001 C CNN F 3 "" H 9900 2400 50 0001 C CNN 1 9900 2400 1 0 0 -1 $EndComp Connection ~ 9900 2400 Wire Wire Line 9550 2400 9550 3300 Wire Wire Line 9450 2400 9450 2950 Wire Wire Line 8850 2400 9350 2400 Connection ~ 9250 2400 Connection ~ 9150 2400 Connection ~ 9050 2400 Connection ~ 8950 2400 $Comp L +3.3V #PWR02 U 1 1 5A7A1901 P 9100 2400 F 0 "#PWR02" H 9100 2250 50 0001 C CNN F 1 "+3.3V" H 9100 2540 50 0000 C CNN F 2 "" H 9100 2400 50 0001 C CNN F 3 "" H 9100 2400 50 0001 C CNN 1 9100 2400 -1 0 0 1 $EndComp Connection ~ 9100 2400 NoConn ~ 10150 1900 NoConn ~ 9650 1900 NoConn ~ 9550 1900 NoConn ~ 9450 1900 NoConn ~ 9350 1900 NoConn ~ 8850 1900 NoConn ~ 8750 1900 NoConn ~ 8650 1900 NoConn ~ 8550 1900 NoConn ~ 8450 1900 NoConn ~ 7950 1900 NoConn ~ 7850 1900 NoConn ~ 7750 1900 NoConn ~ 7650 1900 NoConn ~ 7550 1900 NoConn ~ 7050 1900 NoConn ~ 6950 1900 NoConn ~ 6850 1900 NoConn ~ 6750 1900 NoConn ~ 6250 1900 Wire Wire Line 8050 2400 8350 2400 Connection ~ 8250 2400 Connection ~ 8150 2400 Wire Wire Line 8200 1900 8200 2700 Connection ~ 8200 2400 NoConn ~ 7850 2400 NoConn ~ 7750 2400 NoConn ~ 7650 2400 Wire Wire Line 7150 2400 7450 2400 Connection ~ 7350 2400 Connection ~ 7250 2400 Wire Wire Line 7300 1900 7300 2700 Connection ~ 7300 2400 NoConn ~ 7050 2400 NoConn ~ 6950 2400 NoConn ~ 6850 2400 NoConn ~ 6750 2400 Wire Wire Line 6350 2400 6650 2400 Connection ~ 6550 2400 Connection ~ 6450 2400 NoConn ~ 6250 2400 Connection ~ 6500 2400 Text Label 6500 2700 1 60 ~ 0 P00 Text Label 7300 2700 1 60 ~ 0 P01 Text Label 8200 2700 1 60 ~ 0 P02 $Comp L Conn_02x40_Row_Letter_First J18 U 1 1 5A7A1723 P 8150 2200 F 0 "J18" H 8200 4200 50 0000 C CNN F 1 "Micro:bit Edge Connector" V 8200 2200 50 0000 C CNN F 2 "lts:RBB40DHHN" H 8150 2200 50 0001 C CNN F 3 "" H 8150 2200 50 0001 C CNN 1 8150 2200 0 -1 -1 0 $EndComp Wire Wire Line 9750 1900 10050 1900 Connection ~ 9950 1900 Connection ~ 9850 1900 Wire Wire Line 8950 1900 9250 1900 Connection ~ 9150 1900 Connection ~ 9050 1900 Wire Wire Line 7150 1900 7450 1900 Connection ~ 7350 1900 Connection ~ 7250 1900 Wire Wire Line 6350 1900 6650 1900 Connection ~ 6550 1900 Connection ~ 6450 1900 Connection ~ 6500 1900 Connection ~ 7300 1900 Wire Wire Line 9100 2400 9100 1900 Connection ~ 9100 1900 Wire Wire Line 9900 2400 9900 1900 Connection ~ 9900 1900 Wire Wire Line 8050 1900 8350 1900 Connection ~ 8150 1900 Connection ~ 8250 1900 Connection ~ 8200 1900 NoConn ~ 7950 2400 Text Label 8750 2700 1 60 ~ 0 P16 Text Label 8650 2700 1 60 ~ 0 P15 Text Label 8550 2700 1 60 ~ 0 P14 Text Label 8450 2700 1 60 ~ 0 P13 $Comp L USB_OTG J1 U 1 1 5A7BAC5E P 1000 2550 F 0 "J1" H 800 3000 50 0000 L CNN F 1 "USB_B" H 800 2900 50 0000 L CNN F 2 "Connectors:USB_Micro-B" H 1150 2500 50 0001 C CNN F 3 "" H 1150 2500 50 0001 C CNN 1 1000 2550 1 0 0 -1 $EndComp $Comp L GND #PWR03 U 1 1 5A7BAC5F P 1000 3200 F 0 "#PWR03" H 1000 2950 50 0001 C CNN F 1 "GND" H 1000 3050 50 0000 C CNN F 2 "" H 1000 3200 50 0001 C CNN F 3 "" H 1000 3200 50 0001 C CNN 1 1000 3200 1 0 0 -1 $EndComp $Comp L C C9 U 1 1 5A7BAC66 P 9250 4050 F 0 "C9" H 9275 4150 50 0000 L CNN F 1 "DNP" H 9275 3950 50 0000 L CNN F 2 "Capacitors_SMD:C_1206_HandSoldering" H 9288 3900 50 0001 C CNN F 3 "" H 9250 4050 50 0001 C CNN 1 9250 4050 1 0 0 -1 $EndComp $Comp L +3.3V #PWR04 U 1 1 5A7BAC67 P 9250 3900 F 0 "#PWR04" H 9250 3750 50 0001 C CNN F 1 "+3.3V" H 9250 4040 50 0000 C CNN F 2 "" H 9250 3900 50 0001 C CNN F 3 "" H 9250 3900 50 0001 C CNN 1 9250 3900 1 0 0 -1 $EndComp $Comp L GND #PWR05 U 1 1 5A7BAC68 P 9250 4200 F 0 "#PWR05" H 9250 3950 50 0001 C CNN F 1 "GND" H 9250 4050 50 0000 C CNN F 2 "" H 9250 4200 50 0001 C CNN F 3 "" H 9250 4200 50 0001 C CNN 1 9250 4200 1 0 0 -1 $EndComp $Comp L +3.3V #PWR06 U 1 1 5A7BAC69 P 2800 1300 F 0 "#PWR06" H 2800 1150 50 0001 C CNN F 1 "+3.3V" H 2800 1440 50 0000 C CNN F 2 "" H 2800 1300 50 0001 C CNN F 3 "" H 2800 1300 50 0001 C CNN 1 2800 1300 1 0 0 -1 $EndComp Wire Wire Line 1000 2950 1000 3200 Wire Wire Line 900 2950 1000 2950 Wire Wire Line 1300 2650 3200 2650 Wire Wire Line 1300 2550 3200 2550 Wire Wire Line 1300 2350 2500 2350 Wire Wire Line 2500 2350 2500 2150 Wire Wire Line 2500 2150 3200 2150 Wire Wire Line 3050 2150 3050 2050 Wire Wire Line 3050 2050 3200 2050 Connection ~ 3050 2150 $Comp L GND #PWR07 U 1 1 5A7BAC6B P 2700 3400 F 0 "#PWR07" H 2700 3150 50 0001 C CNN F 1 "GND" H 2700 3250 50 0000 C CNN F 2 "" H 2700 3400 50 0001 C CNN F 3 "" H 2700 3400 50 0001 C CNN 1 2700 3400 1 0 0 -1 $EndComp Connection ~ 1550 2350 Text Notes 8900 4450 0 30 ~ 0 Bulk Capacitance if Micro:bit powered $Comp L TEST_1P J12 U 1 1 5A7BAC6D P 3750 7100 F 0 "J12" H 3750 7370 50 0000 C CNN F 1 "5V" H 3750 7300 50 0000 C CNN F 2 "Measurement_Points:Measurement_Point_Round-SMD-Pad_Small" H 3950 7100 50 0001 C CNN F 3 "" H 3950 7100 50 0001 C CNN 1 3750 7100 1 0 0 -1 $EndComp $Comp L VBUS #PWR08 U 1 1 5A7BAC6E P 3750 7100 F 0 "#PWR08" H 3750 6950 50 0001 C CNN F 1 "VBUS" H 3750 7250 50 0000 C CNN F 2 "" H 3750 7100 50 0001 C CNN F 3 "" H 3750 7100 50 0001 C CNN 1 3750 7100 -1 0 0 1 $EndComp $Comp L R R1 U 1 1 5A7BAC6F P 3050 2350 F 0 "R1" V 3130 2350 50 0000 C CNN F 1 "1k" V 3050 2350 50 0000 C CNN F 2 "Resistors_SMD:R_0603_HandSoldering" V 2980 2350 50 0001 C CNN F 3 "" H 3050 2350 50 0001 C CNN 1 3050 2350 0 1 1 0 $EndComp $Comp L VBUS #PWR09 U 1 1 5A7BAC70 P 3800 1050 F 0 "#PWR09" H 3800 900 50 0001 C CNN F 1 "VBUS" H 3800 1200 50 0000 C CNN F 2 "" H 3800 1050 50 0001 C CNN F 3 "" H 3800 1050 50 0001 C CNN 1 3800 1050 1 0 0 -1 $EndComp $Comp L C C1 U 1 1 5A7BAC71 P 3650 1250 F 0 "C1" H 3550 1350 50 0000 L CNN F 1 "4.7uF" H 3400 1150 50 0000 L CNN F 2 "Capacitors_SMD:C_0805_HandSoldering" H 3688 1100 50 0001 C CNN F 3 "" H 3650 1250 50 0001 C CNN 1 3650 1250 1 0 0 -1 $EndComp $Comp L C C2 U 1 1 5A7BAC72 P 3950 1250 F 0 "C2" H 3975 1350 50 0000 L CNN F 1 "0.1uF" H 3975 1150 50 0000 L CNN F 2 "Capacitors_SMD:C_0603_HandSoldering" H 3988 1100 50 0001 C CNN F 3 "" H 3950 1250 50 0001 C CNN 1 3950 1250 1 0 0 -1 $EndComp $Comp L GND #PWR010 U 1 1 5A7BAC73 P 3800 1450 F 0 "#PWR010" H 3800 1200 50 0001 C CNN F 1 "GND" H 3800 1300 50 0000 C CNN F 2 "" H 3800 1450 50 0001 C CNN F 3 "" H 3800 1450 50 0001 C CNN 1 3800 1450 1 0 0 -1 $EndComp Wire Wire Line 3650 1100 3950 1100 Wire Wire Line 3800 1100 3800 1050 Connection ~ 3800 1100 Wire Wire Line 3800 1450 3800 1400 Wire Wire Line 3650 1400 3950 1400 Connection ~ 3800 1400 $Comp L C C4 U 1 1 5A7BAC74 P 2350 1650 F 0 "C4" H 2250 1750 50 0000 L CNN F 1 "4.7uF" H 2100 1550 50 0000 L CNN F 2 "Capacitors_SMD:C_0805_HandSoldering" H 2388 1500 50 0001 C CNN F 3 "" H 2350 1650 50 0001 C CNN 1 2350 1650 -1 0 0 1 $EndComp $Comp L C C5 U 1 1 5A7BAC75 P 2050 1650 F 0 "C5" H 2075 1750 50 0000 L CNN F 1 "0.1uF" H 2075 1550 50 0000 L CNN F 2 "Capacitors_SMD:C_0603_HandSoldering" H 2088 1500 50 0001 C CNN F 3 "" H 2050 1650 50 0001 C CNN 1 2050 1650 -1 0 0 1 $EndComp $Comp L GND #PWR011 U 1 1 5A7BAC76 P 2200 1450 F 0 "#PWR011" H 2200 1200 50 0001 C CNN F 1 "GND" H 2200 1300 50 0000 C CNN F 2 "" H 2200 1450 50 0001 C CNN F 3 "" H 2200 1450 50 0001 C CNN 1 2200 1450 -1 0 0 1 $EndComp Wire Wire Line 2050 1800 2350 1800 Wire Wire Line 2200 1450 2200 1500 Wire Wire Line 2050 1500 2350 1500 Connection ~ 2200 1500 $Comp L CP2102N U2 U 1 1 5A7BAC78 P 3950 2650 F 0 "U2" H 3950 3450 60 0000 C CNN F 1 "CP2102N" H 4400 1800 60 0000 C CNN F 2 "Housings_DFN_QFN:SiliconLabs_QFN-20-1EP_3x3mm_Pitch0.5mm" H 3950 2650 60 0001 C CNN F 3 "./doc/cp2102n-datasheet.pdf" H 3950 2650 60 0001 C CNN 1 3950 2650 1 0 0 -1 $EndComp Wire Wire Line 8450 2400 8450 2700 Wire Wire Line 8550 2400 8550 2700 Wire Wire Line 8650 2400 8650 2700 Wire Wire Line 8750 2400 8750 2700 $Sheet S 650 5700 950 900 U 5A7C7D4B F0 "LCD" 60 F1 "lcd.sch" 60 $EndSheet Wire Wire Line 4750 2200 4950 2200 Wire Wire Line 4750 2300 4950 2300 NoConn ~ 4750 2500 NoConn ~ 4750 2600 NoConn ~ 4750 3050 NoConn ~ 4750 3150 NoConn ~ 4750 3250 NoConn ~ 4750 1950 NoConn ~ 4750 2050 Wire Wire Line 3700 3650 3900 3650 Connection ~ 3800 3650 Wire Wire Line 3800 3650 3800 3700 $Comp L GND #PWR012 U 1 1 5A7CF61E P 3800 3700 F 0 "#PWR012" H 3800 3450 50 0001 C CNN F 1 "GND" H 3800 3550 50 0000 C CNN F 2 "" H 3800 3700 50 0001 C CNN F 3 "" H 3800 3700 50 0001 C CNN 1 3800 3700 1 0 0 -1 $EndComp $Comp L D_Schottky D1 U 1 1 5A7CF6D6 P 2900 1700 F 0 "D1" H 2900 1800 50 0000 C CNN F 1 "BAT60A" H 2900 1600 50 0000 C CNN F 2 "Diodes_SMD:D_SOD-323_HandSoldering" H 2900 1700 50 0001 C CNN F 3 "" H 2900 1700 50 0001 C CNN 1 2900 1700 0 1 1 0 $EndComp Wire Wire Line 2900 1850 2900 2350 Wire Wire Line 2200 1950 3200 1950 Connection ~ 2900 1950 Wire Notes Line 700 700 700 4100 Wire Notes Line 5800 700 700 700 Text Notes 750 4050 0 60 ~ 0 USB Power and Data Collection UART Text Notes 1450 3650 0 30 ~ 0 Surge / Transient Protection Wire Notes Line 1400 2850 2850 2850 Wire Notes Line 1400 3650 2850 3650 Text GLabel 8750 2700 3 45 Input ~ 0 COMPUTER_TXO Text GLabel 8650 2700 3 45 Input ~ 0 COMPUTER_RXI Text GLabel 4950 2200 2 45 Input ~ 0 COMPUTER_RXI Text GLabel 4950 2300 2 45 Input ~ 0 COMPUTER_TXO Text GLabel 9550 3300 3 45 Input ~ 0 SDA Text GLabel 9450 2950 3 45 Input ~ 0 SCL Text GLabel 8550 2700 3 45 Input ~ 0 nCCS811 Text Label 9450 2700 1 60 ~ 0 P19 Text Label 9550 2700 1 60 ~ 0 P20 $Sheet S 650 6850 950 900 U 5A7DC600 F0 "Sensors" 60 F1 "sensors.sch" 60 $EndSheet Text GLabel 8450 2700 3 45 Input ~ 0 CO2_SENSOR $Comp L R R9 U 1 1 5A7DFB2A P 9950 2900 F 0 "R9" V 10030 2900 50 0000 C CNN F 1 "4.7k" V 9950 2900 50 0000 C CNN F 2 "Resistors_SMD:R_0603_HandSoldering" V 9880 2900 50 0001 C CNN F 3 "" H 9950 2900 50 0001 C CNN 1 9950 2900 0 1 1 0 $EndComp $Comp L R R10 U 1 1 5A7DFBF1 P 9950 3200 F 0 "R10" V 10030 3200 50 0000 C CNN F 1 "4.7k" V 9950 3200 50 0000 C CNN F 2 "Resistors_SMD:R_0603_HandSoldering" V 9880 3200 50 0001 C CNN F 3 "" H 9950 3200 50 0001 C CNN 1 9950 3200 0 1 1 0 $EndComp Wire Wire Line 10100 2900 10100 3200 $Comp L +3.3V #PWR013 U 1 1 5A7DFD12 P 10300 2950 F 0 "#PWR013" H 10300 2800 50 0001 C CNN F 1 "+3.3V" H 10300 3090 50 0000 C CNN F 2 "" H 10300 2950 50 0001 C CNN F 3 "" H 10300 2950 50 0001 C CNN 1 10300 2950 1 0 0 -1 $EndComp Wire Wire Line 10100 3000 10300 3000 Wire Wire Line 10300 3000 10300 2950 Connection ~ 10100 3000 Connection ~ 9550 3200 Text Notes 3900 6750 0 60 ~ 0 Test Points Connection ~ 9450 2900 $Comp L PWR_FLAG #FLG014 U 1 1 5A7EC327 P 2900 1300 F 0 "#FLG014" H 2900 1375 50 0001 C CNN F 1 "PWR_FLAG" H 2900 1450 50 0000 C CNN F 2 "" H 2900 1300 50 0001 C CNN F 3 "" H 2900 1300 50 0001 C CNN 1 2900 1300 0 1 1 0 $EndComp Wire Wire Line 2900 1550 2900 1300 Wire Wire Line 2900 1300 2800 1300 Text Notes 2750 1100 0 45 Italic 0 95mA Wire Wire Line 9800 3200 9550 3200 Wire Wire Line 9800 2900 9450 2900 $Comp L TEST_1P J15 U 1 1 5A7DDB1E P 4500 7100 F 0 "J15" H 4500 7370 50 0000 C CNN F 1 "PWM" H 4500 7300 50 0000 C CNN F 2 "Measurement_Points:Measurement_Point_Round-SMD-Pad_Small" H 4700 7100 50 0001 C CNN F 3 "" H 4700 7100 50 0001 C CNN 1 4500 7100 1 0 0 -1 $EndComp $Comp L TEST_1P J16 U 1 1 5A7DDBA5 P 4750 7100 F 0 "J16" H 4750 7370 50 0000 C CNN F 1 "VOC" H 4750 7300 50 0000 C CNN F 2 "Measurement_Points:Measurement_Point_Round-SMD-Pad_Small" H 4950 7100 50 0001 C CNN F 3 "" H 4950 7100 50 0001 C CNN 1 4750 7100 1 0 0 -1 $EndComp Text GLabel 4250 7100 3 45 Input ~ 0 COMPUTER_RXI Text GLabel 4000 7100 3 45 Input ~ 0 COMPUTER_TXO Text GLabel 4500 7100 3 45 Input ~ 0 CO2_SENSOR Text GLabel 4750 7100 3 45 Input ~ 0 nCCS811 Wire Wire Line 1550 2200 1550 3400 $Comp L VBUS #PWR015 U 1 1 5A7DE3D0 P 1550 2200 F 0 "#PWR015" H 1550 2050 50 0001 C CNN F 1 "VBUS" H 1550 2350 50 0000 C CNN F 2 "" H 1550 2200 50 0001 C CNN F 3 "" H 1550 2200 50 0001 C CNN 1 1550 2200 1 0 0 -1 $EndComp Wire Notes Line 700 4100 5800 4100 Wire Notes Line 5800 4100 5800 700 $Comp L TEST_1P J14 U 1 1 5A7E17FC P 4250 7100 F 0 "J14" H 4250 7370 50 0000 C CNN F 1 "RXI" H 4250 7300 50 0000 C CNN F 2 "Measurement_Points:Measurement_Point_Round-SMD-Pad_Small" H 4450 7100 50 0001 C CNN F 3 "" H 4450 7100 50 0001 C CNN 1 4250 7100 1 0 0 -1 $EndComp $Comp L TEST_1P J13 U 1 1 5A7E1802 P 4000 7100 F 0 "J13" H 4000 7370 50 0000 C CNN F 1 "TXO" H 4000 7300 50 0000 C CNN F 2 "Measurement_Points:Measurement_Point_Round-SMD-Pad_Small" H 4200 7100 50 0001 C CNN F 3 "" H 4200 7100 50 0001 C CNN 1 4000 7100 1 0 0 -1 $EndComp $Comp L Speaker_Ultrasound LS1 U 1 1 5A7EA06A P 6950 3750 F 0 "LS1" H 6950 3550 50 0000 R CNN F 1 "Piezo Speaker" H 7200 4000 50 0000 R CNN F 2 "lts:Murata_PKMCS0909E4000_HandSoldering" H 6915 3700 50 0001 C CNN F 3 "" H 6915 3700 50 0001 C CNN 1 6950 3750 -1 0 0 1 $EndComp Text Label 7550 2700 1 60 ~ 0 P08 Wire Wire Line 7550 2400 7550 2700 Wire Wire Line 6500 1900 6500 2700 $Comp L GND #PWR016 U 1 1 5A7EBE65 P 7300 3750 F 0 "#PWR016" H 7300 3500 50 0001 C CNN F 1 "GND" H 7300 3600 50 0000 C CNN F 2 "" H 7300 3750 50 0001 C CNN F 3 "" H 7300 3750 50 0001 C CNN 1 7300 3750 1 0 0 -1 $EndComp Wire Wire Line 7150 3750 7300 3750 Wire Notes Line 6450 3350 8000 3350 Text Notes 6500 3450 0 60 ~ 0 Audio Text Notes 6750 4150 0 30 ~ 0 Multi-tone using the makecode "Music" blocks Wire Notes Line 6450 4150 8000 4150 Wire Notes Line 6450 4150 6450 3350 $Comp L Conn_01x01 J4 U 1 1 5A7ED14E P 3050 4700 F 0 "J4" H 3050 4800 50 0000 C CNN F 1 "P1" H 3050 4600 50 0000 C CNN F 2 "Mounting_Holes:MountingHole_3.2mm_M3_Pad" H 3050 4700 50 0001 C CNN F 3 "" H 3050 4700 50 0001 C CNN 1 3050 4700 -1 0 0 1 $EndComp $Comp L Conn_01x01 J6 U 1 1 5A7ED2C6 P 3050 5200 F 0 "J6" H 3050 5300 50 0000 C CNN F 1 "P8" H 3050 5100 50 0000 C CNN F 2 "Mounting_Holes:MountingHole_3.2mm_M3_Pad" H 3050 5200 50 0001 C CNN F 3 "" H 3050 5200 50 0001 C CNN 1 3050 5200 -1 0 0 1 $EndComp $Comp L Conn_01x01 J7 U 1 1 5A7ED366 P 3050 5500 F 0 "J7" H 3050 5600 50 0000 C CNN F 1 "GND" H 3050 5400 50 0000 C CNN F 2 "Mounting_Holes:MountingHole_3.2mm_M3_Pad" H 3050 5500 50 0001 C CNN F 3 "" H 3050 5500 50 0001 C CNN 1 3050 5500 -1 0 0 1 $EndComp $Comp L Conn_01x01 J5 U 1 1 5A7ED733 P 3050 4950 F 0 "J5" H 3050 5050 50 0000 C CNN F 1 "P2" H 3050 4850 50 0000 C CNN F 2 "Mounting_Holes:MountingHole_3.2mm_M3_Pad" H 3050 4950 50 0001 C CNN F 3 "" H 3050 4950 50 0001 C CNN 1 3050 4950 -1 0 0 1 $EndComp $Comp L Conn_01x04 J3 U 1 1 5A7EDA1D P 2350 5250 F 0 "J3" H 2350 5450 50 0000 C CNN F 1 "I2C_5V" H 2350 4950 50 0000 C CNN F 2 "Pin_Headers:Pin_Header_Straight_1x04_Pitch2.54mm" H 2350 5250 50 0001 C CNN F 3 "" H 2350 5250 50 0001 C CNN 1 2350 5250 -1 0 0 1 $EndComp $Comp L Conn_01x01 J8 U 1 1 5A7EDB1D P 3050 5750 F 0 "J8" H 3050 5850 50 0000 C CNN F 1 "3V3" H 3050 5650 50 0000 C CNN F 2 "Mounting_Holes:MountingHole_3.2mm_M3_Pad" H 3050 5750 50 0001 C CNN F 3 "" H 3050 5750 50 0001 C CNN 1 3050 5750 -1 0 0 1 $EndComp Wire Wire Line 3250 4700 3400 4700 Wire Wire Line 3250 4950 3400 4950 Wire Wire Line 3250 5200 3400 5200 Text Label 3400 4700 0 60 ~ 0 P00 Text Label 3400 4950 0 60 ~ 0 P01 Text Label 3400 5200 0 60 ~ 0 P02 $Comp L GND #PWR017 U 1 1 5A7EEBFF P 3250 5500 F 0 "#PWR017" H 3250 5250 50 0001 C CNN F 1 "GND" H 3250 5350 50 0000 C CNN F 2 "" H 3250 5500 50 0001 C CNN F 3 "" H 3250 5500 50 0001 C CNN 1 3250 5500 0 -1 -1 0 $EndComp $Comp L +3.3V #PWR018 U 1 1 5A7EEC77 P 3250 5750 F 0 "#PWR018" H 3250 5600 50 0001 C CNN F 1 "+3.3V" H 3250 5890 50 0000 C CNN F 2 "" H 3250 5750 50 0001 C CNN F 3 "" H 3250 5750 50 0001 C CNN 1 3250 5750 0 1 1 0 $EndComp Wire Wire Line 2550 5050 2650 5050 $Comp L GND #PWR019 U 1 1 5A7EFE7A P 2650 5050 F 0 "#PWR019" H 2650 4800 50 0001 C CNN F 1 "GND" H 2650 4900 50 0000 C CNN F 2 "" H 2650 5050 50 0001 C CNN F 3 "" H 2650 5050 50 0001 C CNN 1 2650 5050 -1 0 0 1 $EndComp Text GLabel 2550 5150 2 45 Input ~ 0 SCL Text GLabel 2550 5250 2 45 Input ~ 0 SDA $Comp L +5V #PWR020 U 1 1 5A7F0111 P 2650 5350 F 0 "#PWR020" H 2650 5200 50 0001 C CNN F 1 "+5V" H 2650 5490 50 0000 C CNN F 2 "" H 2650 5350 50 0001 C CNN F 3 "" H 2650 5350 50 0001 C CNN 1 2650 5350 -1 0 0 1 $EndComp Wire Wire Line 2550 5350 2650 5350 Text Notes 2150 4450 0 60 ~ 0 User Expansion Wire Notes Line 2100 4350 3700 4350 Text Notes 7700 1050 0 60 ~ 0 LED Array Face Wire Wire Line 9650 1250 10150 1250 Connection ~ 10050 1250 Connection ~ 9950 1250 Connection ~ 9850 1250 Connection ~ 9750 1250 $Comp L GND #PWR021 U 1 1 5A831740 P 9900 1250 F 0 "#PWR021" H 9900 1000 50 0001 C CNN F 1 "GND" H 9900 1100 50 0000 C CNN F 2 "" H 9900 1250 50 0001 C CNN F 3 "" H 9900 1250 50 0001 C CNN 1 9900 1250 1 0 0 -1 $EndComp Connection ~ 9900 1250 Wire Wire Line 9550 1250 9550 1550 Wire Wire Line 9450 1250 9450 1550 Wire Wire Line 8850 1250 9350 1250 Connection ~ 9250 1250 Connection ~ 9150 1250 Connection ~ 9050 1250 Connection ~ 8950 1250 $Comp L +3.3V #PWR022 U 1 1 5A83174E P 9100 1250 F 0 "#PWR022" H 9100 1100 50 0001 C CNN F 1 "+3.3V" H 9100 1390 50 0000 C CNN F 2 "" H 9100 1250 50 0001 C CNN F 3 "" H 9100 1250 50 0001 C CNN 1 9100 1250 -1 0 0 1 $EndComp Connection ~ 9100 1250 NoConn ~ 10150 750 NoConn ~ 9650 750 NoConn ~ 9550 750 NoConn ~ 9450 750 NoConn ~ 9350 750 NoConn ~ 8850 750 NoConn ~ 8750 750 NoConn ~ 8650 750 NoConn ~ 8550 750 NoConn ~ 8450 750 NoConn ~ 7950 750 NoConn ~ 7850 750 NoConn ~ 7750 750 NoConn ~ 7650 750 NoConn ~ 7550 750 NoConn ~ 7050 750 NoConn ~ 6950 750 NoConn ~ 6850 750 NoConn ~ 6750 750 NoConn ~ 6250 750 Wire Wire Line 8050 1250 8350 1250 Connection ~ 8250 1250 Connection ~ 8150 1250 Wire Wire Line 8200 750 8200 1550 Connection ~ 8200 1250 NoConn ~ 7850 1250 NoConn ~ 7750 1250 NoConn ~ 7650 1250 Wire Wire Line 7150 1250 7450 1250 Connection ~ 7350 1250 Connection ~ 7250 1250 Wire Wire Line 7300 750 7300 1550 Connection ~ 7300 1250 NoConn ~ 7050 1250 NoConn ~ 6950 1250 NoConn ~ 6850 1250 NoConn ~ 6750 1250 Wire Wire Line 6350 1250 6650 1250 Connection ~ 6550 1250 Connection ~ 6450 1250 NoConn ~ 6250 1250 Connection ~ 6500 1250 Text Label 6500 1550 1 60 ~ 0 P00 Text Label 7300 1550 1 60 ~ 0 P01 Text Label 8200 1550 1 60 ~ 0 P02 $Comp L Conn_02x40_Row_Letter_First J19 U 1 1 5A831782 P 8150 1050 F 0 "J19" H 8200 3050 50 0000 C CNN F 1 "Micro:bit Edge Connector" V 8200 1050 50 0000 C CNN F 2 "lts:TE1734101-8" H 8150 1050 50 0001 C CNN F 3 "" H 8150 1050 50 0001 C CNN 1 8150 1050 0 -1 -1 0 $EndComp Wire Wire Line 9750 750 10050 750 Connection ~ 9950 750 Connection ~ 9850 750 Wire Wire Line 8950 750 9250 750 Connection ~ 9150 750 Connection ~ 9050 750 Wire Wire Line 7150 750 7450 750 Connection ~ 7350 750 Connection ~ 7250 750 Wire Wire Line 6350 750 6650 750 Connection ~ 6550 750 Connection ~ 6450 750 Connection ~ 6500 750 Connection ~ 7300 750 Wire Wire Line 9100 1250 9100 750 Connection ~ 9100 750 Wire Wire Line 9900 1250 9900 750 Connection ~ 9900 750 Wire Wire Line 8050 750 8350 750 Connection ~ 8150 750 Connection ~ 8250 750 Connection ~ 8200 750 NoConn ~ 7950 1250 Text Label 8750 1550 1 60 ~ 0 P16 Text Label 8650 1550 1 60 ~ 0 P15 Text Label 8550 1550 1 60 ~ 0 P14 Text Label 8450 1550 1 60 ~ 0 P13 Wire Wire Line 8450 1250 8450 1550 Wire Wire Line 8550 1250 8550 1550 Wire Wire Line 8650 1250 8650 1550 Wire Wire Line 8750 1250 8750 1550 Text Label 9450 1550 1 60 ~ 0 P19 Text Label 9550 1550 1 60 ~ 0 P20 Text Label 7550 1550 1 60 ~ 0 P08 Wire Wire Line 7550 1250 7550 1550 Wire Wire Line 6500 750 6500 1550 Wire Wire Line 2200 1950 2200 1800 Connection ~ 2200 1800 NoConn ~ 4750 2700 NoConn ~ 4750 2800 $Comp L Jumper JP1 U 1 1 5A85FC17 P 7450 3650 F 0 "JP1" H 7450 3650 50 0000 C CNN F 1 "Buzzer Enable" H 7450 3850 50 0000 C CNN F 2 "Pin_Headers:Pin_Header_Straight_1x02_Pitch2.54mm" H 7450 3650 50 0001 C CNN F 3 "" H 7450 3650 50 0001 C CNN 1 7450 3650 1 0 0 -1 $EndComp Wire Wire Line 7750 3650 7950 3650 Text Label 7950 3650 2 60 ~ 0 P00 Wire Notes Line 8000 4150 8000 3350 Wire Notes Line 3700 4350 3700 6000 Wire Notes Line 3700 6000 2100 6000 Wire Notes Line 2100 6000 2100 4350 $Comp L VBUS #PWR023 U 1 1 5A7DFE67 P 4950 5050 F 0 "#PWR023" H 4950 4900 50 0001 C CNN F 1 "VBUS" H 4950 5200 50 0000 C CNN F 2 "" H 4950 5050 50 0001 C CNN F 3 "" H 4950 5050 50 0001 C CNN 1 4950 5050 0 -1 -1 0 $EndComp Wire Wire Line 4950 5050 5100 5050 $Comp L D_Schottky D2 U 1 1 5A85E951 P 5250 5050 F 0 "D2" H 5250 5150 50 0000 C CNN F 1 "BAT60A" H 5250 4950 50 0000 C CNN F 2 "Diodes_SMD:D_SOD-323_HandSoldering" H 5250 5050 50 0001 C CNN F 3 "" H 5250 5050 50 0001 C CNN 1 5250 5050 -1 0 0 1 $EndComp $Comp L +5V #PWR024 U 1 1 5A8644EE P 5550 5050 F 0 "#PWR024" H 5550 4900 50 0001 C CNN F 1 "+5V" H 5550 5190 50 0000 C CNN F 2 "" H 5550 5050 50 0001 C CNN F 3 "" H 5550 5050 50 0001 C CNN 1 5550 5050 0 1 1 0 $EndComp Wire Wire Line 5400 5050 5550 5050 $Comp L +3.3V #PWR025 U 1 1 5A864A2C P 6900 5200 F 0 "#PWR025" H 6900 5050 50 0001 C CNN F 1 "+3.3V" H 6900 5340 50 0000 C CNN F 2 "" H 6900 5200 50 0001 C CNN F 3 "" H 6900 5200 50 0001 C CNN 1 6900 5200 1 0 0 -1 $EndComp $Comp L GND #PWR026 U 1 1 5A864A7C P 6900 5300 F 0 "#PWR026" H 6900 5050 50 0001 C CNN F 1 "GND" H 6900 5150 50 0000 C CNN F 2 "" H 6900 5300 50 0001 C CNN F 3 "" H 6900 5300 50 0001 C CNN 1 6900 5300 0 1 1 0 $EndComp $Comp L +5V #PWR027 U 1 1 5A864D73 P 6900 5400 F 0 "#PWR027" H 6900 5250 50 0001 C CNN F 1 "+5V" H 6900 5540 50 0000 C CNN F 2 "" H 6900 5400 50 0001 C CNN F 3 "" H 6900 5400 50 0001 C CNN 1 6900 5400 -1 0 0 1 $EndComp Wire Notes Line 6550 4750 6550 5850 Wire Notes Line 6550 5850 7450 5850 Wire Notes Line 7450 5850 7450 4750 Wire Notes Line 7450 4750 6550 4750 Text Notes 6550 4750 0 45 ~ 0 External Boost Supply $Comp L Conn_01x03 J2 U 1 1 5A8617CB P 7100 5300 F 0 "J2" H 7100 5500 50 0000 C CNN F 1 "Boost" H 7100 5100 50 0000 C CNN F 2 "lts:CONN_01x03_Keyed" H 7100 5300 50 0001 C CNN F 3 "" H 7100 5300 50 0001 C CNN 1 7100 5300 1 0 0 -1 $EndComp $Comp L TPD3E001 U1 U 1 1 5A870DAB P 2150 3300 F 0 "U1" H 2450 3600 60 0000 C CNN F 1 "TPD3E001" H 2100 3050 60 0000 C CNN F 2 "lts:DFN-6-1EP_3x3mm_Pitch0.95mm_TI_PWSON_HandSoldering" H 2150 3100 60 0001 C CNN F 3 "" H 2150 3100 60 0001 C CNN 1 2150 3300 1 0 0 -1 $EndComp NoConn ~ 1600 3300 Wire Wire Line 2700 3400 2700 3300 Wire Wire Line 1550 3400 1600 3400 Wire Notes Line 1400 3650 1400 2850 Wire Notes Line 2850 3650 2850 2850 NoConn ~ 2050 2850 Wire Wire Line 2150 2850 2150 2650 Connection ~ 2150 2650 Wire Wire Line 2250 2850 2250 2550 Connection ~ 2250 2550 $Comp L PWR_FLAG #FLG028 U 1 1 5A875A2B P 1800 2350 F 0 "#FLG028" H 1800 2425 50 0001 C CNN F 1 "PWR_FLAG" H 1800 2500 50 0000 C CNN F 2 "" H 1800 2350 50 0001 C CNN F 3 "" H 1800 2350 50 0001 C CNN 1 1800 2350 1 0 0 -1 $EndComp Connection ~ 1800 2350 NoConn ~ 1300 2750 $Comp L PWR_FLAG #FLG029 U 1 1 5A876003 P 5500 4950 F 0 "#FLG029" H 5500 5025 50 0001 C CNN F 1 "PWR_FLAG" H 5500 5100 50 0000 C CNN F 2 "" H 5500 4950 50 0001 C CNN F 3 "" H 5500 4950 50 0001 C CNN 1 5500 4950 1 0 0 -1 $EndComp Wire Wire Line 5500 5050 5500 4950 Connection ~ 5500 5050 $Comp L PWR_FLAG #FLG030 U 1 1 5A87692F P 1000 3100 F 0 "#FLG030" H 1000 3175 50 0001 C CNN F 1 "PWR_FLAG" H 1000 3250 50 0000 C CNN F 2 "" H 1000 3100 50 0001 C CNN F 3 "" H 1000 3100 50 0001 C CNN 1 1000 3100 0 1 1 0 $EndComp Connection ~ 1000 3100 $EndSCHEMATC