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:custom-charge LIBS:battery_management LIBS:switches LIBS:gpstracker-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 $Comp L ATMEGA328P-AU U1 U 1 1 59A2B62B P 5500 4450 F 0 "U1" H 4750 5700 50 0000 L BNN F 1 "ATMEGA328P-AU" H 5900 3050 50 0000 L BNN F 2 "TQFP32" H 5500 4450 50 0001 C CIN F 3 "" H 5500 4450 50 0001 C CNN 1 5500 4450 1 0 0 -1 $EndComp Text Notes 8550 800 0 120 ~ 24 Battery charger $Comp L C C? U 1 1 59A2CCEB P 8500 1650 F 0 "C?" H 8525 1750 50 0000 L CNN F 1 "4.7uF" H 8525 1550 50 0000 L CNN F 2 "" H 8538 1500 50 0001 C CNN F 3 "" H 8500 1650 50 0001 C CNN 1 8500 1650 1 0 0 -1 $EndComp $Comp L C C? U 1 1 59A2CDFC P 10400 2000 F 0 "C?" H 10425 2100 50 0000 L CNN F 1 "4.7uF" H 10425 1900 50 0000 L CNN F 2 "" H 10438 1850 50 0001 C CNN F 3 "" H 10400 2000 50 0001 C CNN 1 10400 2000 1 0 0 -1 $EndComp $Comp L R R? U 1 1 59A2CE67 P 8900 2150 F 0 "R?" V 8980 2150 50 0000 C CNN F 1 "R" V 8900 2150 50 0000 C CNN F 2 "" V 8830 2150 50 0001 C CNN F 3 "" H 8900 2150 50 0001 C CNN 1 8900 2150 1 0 0 -1 $EndComp $Comp L GND #PWR? U 1 1 59A2CECC P 8900 2400 F 0 "#PWR?" H 8900 2150 50 0001 C CNN F 1 "GND" H 8900 2250 50 0000 C CNN F 2 "" H 8900 2400 50 0001 C CNN F 3 "" H 8900 2400 50 0001 C CNN 1 8900 2400 1 0 0 -1 $EndComp $Comp L GND #PWR? U 1 1 59A2CEED P 10400 2250 F 0 "#PWR?" H 10400 2000 50 0001 C CNN F 1 "GND" H 10400 2100 50 0000 C CNN F 2 "" H 10400 2250 50 0001 C CNN F 3 "" H 10400 2250 50 0001 C CNN 1 10400 2250 1 0 0 -1 $EndComp $Comp L GND #PWR? U 1 1 59A2CF07 P 9400 2200 F 0 "#PWR?" H 9400 1950 50 0001 C CNN F 1 "GND" H 9400 2050 50 0000 C CNN F 2 "" H 9400 2200 50 0001 C CNN F 3 "" H 9400 2200 50 0001 C CNN 1 9400 2200 1 0 0 -1 $EndComp $Comp L GND #PWR? U 1 1 59A2CFA6 P 9900 2700 F 0 "#PWR?" H 9900 2450 50 0001 C CNN F 1 "GND" H 9900 2550 50 0000 C CNN F 2 "" H 9900 2700 50 0001 C CNN F 3 "" H 9900 2700 50 0001 C CNN 1 9900 2700 1 0 0 -1 $EndComp $Comp L R R? U 1 1 59A2CFC5 P 10050 1900 F 0 "R?" V 10130 1900 50 0000 C CNN F 1 "470R" V 10050 1900 50 0000 C CNN F 2 "" V 9980 1900 50 0001 C CNN F 3 "" H 10050 1900 50 0001 C CNN 1 10050 1900 0 -1 -1 0 $EndComp $Comp L LED D? U 1 1 59A2D0D5 P 10000 1400 F 0 "D?" H 10000 1500 50 0000 C CNN F 1 "LED" H 10000 1300 50 0000 C CNN F 2 "" H 10000 1400 50 0001 C CNN F 3 "" H 10000 1400 50 0001 C CNN 1 10000 1400 -1 0 0 1 $EndComp Wire Wire Line 9800 1700 10400 1700 Wire Wire Line 10400 1700 10550 1700 Connection ~ 10400 1700 Wire Wire Line 9400 1400 9400 1500 Text Label 8300 1400 0 60 ~ 0 VIN $Comp L R R? U 1 1 59A3118C P 9900 2050 F 0 "R?" V 9980 2050 50 0000 C CNN F 1 "1k" V 9900 2050 50 0000 C CNN F 2 "" V 9830 2050 50 0001 C CNN F 3 "" H 9900 2050 50 0001 C CNN 1 9900 2050 -1 0 0 1 $EndComp $Comp L LED D? U 1 1 59A311D1 P 9900 2450 F 0 "D?" H 9900 2550 50 0000 C CNN F 1 "LED" H 9900 2350 50 0000 C CNN F 2 "" H 9900 2450 50 0001 C CNN F 3 "" H 9900 2450 50 0001 C CNN 1 9900 2450 0 -1 -1 0 $EndComp $Comp L GND #PWR? U 1 1 59A31622 P 8500 1900 F 0 "#PWR?" H 8500 1650 50 0001 C CNN F 1 "GND" H 8500 1750 50 0000 C CNN F 2 "" H 8500 1900 50 0001 C CNN F 3 "" H 8500 1900 50 0001 C CNN 1 8500 1900 1 0 0 -1 $EndComp $Comp L +BATT #PWR? U 1 1 59A350C2 P 10550 1700 F 0 "#PWR?" H 10550 1550 50 0001 C CNN F 1 "+BATT" H 10550 1840 50 0000 C CNN F 2 "" H 10550 1700 50 0001 C CNN F 3 "" H 10550 1700 50 0001 C CNN 1 10550 1700 1 0 0 -1 $EndComp Text Notes 7550 1100 0 60 ~ 0 Needs modifications for load sharing, as a starting point see :\nsee http://blog.zakkemble.co.uk/a-lithium-battery-charger-with-load-sharing/ $Comp L R R? U 1 1 59A361E6 P 7050 4800 F 0 "R?" V 7130 4800 50 0000 C CNN F 1 "470R" V 7050 4800 50 0000 C CNN F 2 "" V 6980 4800 50 0001 C CNN F 3 "" H 7050 4800 50 0001 C CNN 1 7050 4800 0 1 1 0 $EndComp $Comp L C C? U 1 1 59A3625C P 7600 4800 F 0 "C?" H 7625 4900 50 0000 L CNN F 1 "4.7uF" H 7625 4700 50 0000 L CNN F 2 "" H 7638 4650 50 0001 C CNN F 3 "" H 7600 4800 50 0001 C CNN 1 7600 4800 0 -1 -1 0 $EndComp $Comp L SW_Push_Dual_x2 SW? U 1 1 59A363CE P 7300 5100 F 0 "SW?" H 7350 5200 50 0000 L CNN F 1 "Reset" H 7300 5040 50 0000 C CNN F 2 "" H 7300 5300 50 0001 C CNN F 3 "" H 7300 5300 50 0001 C CNN 1 7300 5100 0 1 1 0 $EndComp $Comp L MCP73832-5-OT U? U 1 1 59A36575 P 9400 1800 F 0 "U?" H 9100 2050 50 0000 L CNN F 1 "MCP73832-5-OT" H 9450 2050 50 0000 L CNN F 2 "TO_SOT_Packages_SMD:SOT-23-5" H 9450 1550 50 0001 L CIN F 3 "" H 9250 1750 50 0001 C CNN 1 9400 1800 1 0 0 -1 $EndComp Connection ~ 8500 1400 Wire Wire Line 8300 1400 8500 1400 Wire Wire Line 8500 1400 9400 1400 Wire Wire Line 9400 1400 9850 1400 Wire Wire Line 9800 1900 9900 1900 Connection ~ 9400 1400 Wire Wire Line 10150 1400 10300 1400 Wire Wire Line 9900 2300 9900 2200 Wire Wire Line 9900 2700 9900 2600 Wire Wire Line 10400 2250 10400 2150 Wire Wire Line 10400 1850 10400 1700 Wire Wire Line 8500 1900 8500 1800 Wire Wire Line 8500 1500 8500 1400 Wire Wire Line 9000 1900 8900 1900 Wire Wire Line 8900 1900 8900 2000 Wire Wire Line 8900 2400 8900 2300 Wire Wire Line 9400 2200 9400 2100 Wire Wire Line 10200 1900 10300 1900 Wire Wire Line 10300 1900 10300 1400 Wire Wire Line 6500 4800 6900 4800 $Comp L VCC #PWR? U 1 1 59A378FB P 7300 4700 F 0 "#PWR?" H 7300 4550 50 0001 C CNN F 1 "VCC" H 7300 4850 50 0000 C CNN F 2 "" H 7300 4700 50 0001 C CNN F 3 "" H 7300 4700 50 0001 C CNN 1 7300 4700 1 0 0 -1 $EndComp Wire Wire Line 7200 4800 7300 4800 Wire Wire Line 7300 4800 7450 4800 Wire Wire Line 7300 4700 7300 4800 Wire Wire Line 7300 4800 7300 4900 Connection ~ 7300 4800 Wire Wire Line 7750 4800 7900 4800 Text Label 7900 4800 2 60 ~ 0 DTR $Comp L GND #PWR? U 1 1 59A381AA P 7300 5400 F 0 "#PWR?" H 7300 5150 50 0001 C CNN F 1 "GND" H 7300 5250 50 0000 C CNN F 2 "" H 7300 5400 50 0001 C CNN F 3 "" H 7300 5400 50 0001 C CNN 1 7300 5400 1 0 0 -1 $EndComp Wire Wire Line 7300 5300 7300 5400 $EndSCHEMATC