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:DonB
LIBS:BalloonRadio-cache
EELAYER 25 0
EELAYER END
$Descr A4 11693 8268
encoding utf-8
Sheet 2 4
Title "NavSpark MicroAPRS balloon radio"
Date ""
Rev ""
Comp ""
Comment1 "Donald Bindner"
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L ACT2103 U3
U 1 1 5562BFB0
P 3950 3200
F 0 "U3" H 3950 3500 60  0000 C CNN
F 1 "ACT2103" H 3950 2850 60  0000 C CNN
F 2 "DonB:SOP-8EP" H 3850 3000 60  0001 C CNN
F 3 "" H 3850 3000 60  0000 C CNN
	1    3950 3200
	1    0    0    -1  
$EndComp
$Comp
L C C3
U 1 1 5562BFCD
P 2500 3250
F 0 "C3" H 2500 3350 40  0000 L CNN
F 1 "10nF" H 2506 3165 40  0000 L CNN
F 2 "DonB:C_0805_HandSoldering" H 2538 3100 30  0001 C CNN
F 3 "" H 2500 3250 60  0000 C CNN
	1    2500 3250
	-1   0    0    1   
$EndComp
NoConn ~ 4400 3150
$Comp
L INDUCTOR L1
U 1 1 5562BFD9
P 3650 3850
F 0 "L1" V 3600 3850 40  0000 C CNN
F 1 "12uH" V 3750 3850 40  0000 C CNN
F 2 "DonB:SRR1260" H 3650 3850 60  0001 C CNN
F 3 "" H 3650 3850 60  0000 C CNN
	1    3650 3850
	0    1    1    0   
$EndComp
$Comp
L R R1
U 1 1 5562BFE3
P 5000 3550
F 0 "R1" V 5080 3550 40  0000 C CNN
F 1 "24K" V 5007 3551 40  0000 C CNN
F 2 "DonB:R_0805_HandSoldering" V 4930 3550 30  0001 C CNN
F 3 "" H 5000 3550 30  0000 C CNN
	1    5000 3550
	0    1    1    0   
$EndComp
$Comp
L R R2
U 1 1 5562BFEB
P 5250 3350
F 0 "R2" V 5330 3350 40  0000 C CNN
F 1 "10K" V 5257 3351 40  0000 C CNN
F 2 "DonB:R_0805_HandSoldering" V 5180 3350 30  0001 C CNN
F 3 "" H 5250 3350 30  0000 C CNN
	1    5250 3350
	0    1    1    0   
$EndComp
$Comp
L C C2
U 1 1 5562BFFB
P 4750 3050
F 0 "C2" H 4750 3150 40  0000 L CNN
F 1 "2.2nF" H 4756 2965 40  0000 L CNN
F 2 "DonB:C_0805_HandSoldering" H 4788 2900 30  0001 C CNN
F 3 "" H 4750 3050 60  0000 C CNN
	1    4750 3050
	0    -1   -1   0   
$EndComp
$Comp
L R R3
U 1 1 5562C002
P 5250 3050
F 0 "R3" V 5330 3050 40  0000 C CNN
F 1 "8.2K" V 5257 3051 40  0000 C CNN
F 2 "DonB:R_0805_HandSoldering" V 5180 3050 30  0001 C CNN
F 3 "" H 5250 3050 30  0000 C CNN
	1    5250 3050
	0    1    1    0   
$EndComp
$Comp
L C C4
U 1 1 5562C013
P 4300 4050
F 0 "C4" H 4300 4150 40  0000 L CNN
F 1 "22uF/10V" H 4306 3965 40  0000 L CNN
F 2 "DonB:C_0805_HandSoldering" H 4338 3900 30  0001 C CNN
F 3 "" H 4300 4050 60  0000 C CNN
	1    4300 4050
	-1   0    0    1   
$EndComp
$Comp
L C C5
U 1 1 5562C01A
P 4650 4050
F 0 "C5" H 4650 4150 40  0000 L CNN
F 1 "22uF/10V" H 4656 3965 40  0000 L CNN
F 2 "DonB:C_0805_HandSoldering" H 4688 3900 30  0001 C CNN
F 3 "" H 4650 4050 60  0000 C CNN
	1    4650 4050
	-1   0    0    1   
$EndComp
Text Notes 5550 4000 0    60   ~ 0
Vout
Text Notes 3400 2550 0    60   ~ 0
Vin
$Comp
L DIODESCH_12 D1
U 1 1 5562C02D
P 3100 4100
F 0 "D1" H 3100 4200 40  0000 C CNN
F 1 "SSB43" H 3100 4000 40  0000 C CNN
F 2 "DonB:Diode-SMB_Handsoldering" H 3100 4100 60  0001 C CNN
F 3 "" H 3100 4100 60  0000 C CNN
	1    3100 4100
	0    -1   -1   0   
$EndComp
$Comp
L R R4
U 1 1 5562C0A7
P 5000 3700
F 0 "R4" V 5080 3700 40  0000 C CNN
F 1 "1.8K" V 5007 3701 40  0000 C CNN
F 2 "DonB:R_0805_HandSoldering" V 4930 3700 30  0001 C CNN
F 3 "" H 5000 3700 30  0000 C CNN
	1    5000 3700
	0    1    1    0   
$EndComp
Text Notes 2500 3200 0    40   ~ 0
/50V
Text Notes 3200 2950 1    40   ~ 0
/50V
Text Notes 2950 2450 1    40   ~ 0
/50V
$Comp
L C C1
U 1 1 5562BFB7
P 3000 2750
F 0 "C1" H 2900 2850 40  0000 L CNN
F 1 "10uF" H 2800 2650 40  0000 L CNN
F 2 "Capacitors_SMD:C_1206_HandSoldering" H 3038 2600 30  0001 C CNN
F 3 "" H 3000 2750 60  0000 C CNN
	1    3000 2750
	0    -1   -1   0   
$EndComp
$Comp
L CP C6
U 1 1 5562C06B
P 3000 2500
F 0 "C6" H 2850 2600 40  0000 L CNN
F 1 "47uF" H 2800 2350 40  0000 L CNN
F 2 "Capacitors_ThroughHole:C_Radial_D8_L11.5_P3.5" H 3038 2350 30  0001 C CNN
F 3 "" H 3000 2500 60  0000 C CNN
	1    3000 2500
	0    1    1    0   
$EndComp
$Comp
L GND #PWR025
U 1 1 5562F1BB
P 2700 2750
F 0 "#PWR025" H 2700 2500 50  0001 C CNN
F 1 "GND" H 2600 2600 50  0000 C CNN
F 2 "" H 2700 2750 60  0000 C CNN
F 3 "" H 2700 2750 60  0000 C CNN
	1    2700 2750
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR026
U 1 1 5562FAEA
P 3500 3450
F 0 "#PWR026" H 3500 3200 50  0001 C CNN
F 1 "GND" H 3600 3300 50  0000 C CNN
F 2 "" H 3500 3450 60  0000 C CNN
F 3 "" H 3500 3450 60  0000 C CNN
	1    3500 3450
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR027
U 1 1 5562FC12
P 3100 4350
F 0 "#PWR027" H 3100 4100 50  0001 C CNN
F 1 "GND" H 3200 4200 50  0000 C CNN
F 2 "" H 3100 4350 60  0000 C CNN
F 3 "" H 3100 4350 60  0000 C CNN
	1    3100 4350
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR028
U 1 1 5562FF0C
P 4400 4350
F 0 "#PWR028" H 4400 4100 50  0001 C CNN
F 1 "GND" H 4500 4200 50  0000 C CNN
F 2 "" H 4400 4350 60  0000 C CNN
F 3 "" H 4400 4350 60  0000 C CNN
	1    4400 4350
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR029
U 1 1 55630705
P 5600 3450
F 0 "#PWR029" H 5600 3200 50  0001 C CNN
F 1 "GND" H 5700 3300 50  0000 C CNN
F 2 "" H 5600 3450 60  0000 C CNN
F 3 "" H 5600 3450 60  0000 C CNN
	1    5600 3450
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR030
U 1 1 55630784
P 5600 3150
F 0 "#PWR030" H 5600 2900 50  0001 C CNN
F 1 "GND" H 5700 3000 50  0000 C CNN
F 2 "" H 5600 3150 60  0000 C CNN
F 3 "" H 5600 3150 60  0000 C CNN
	1    5600 3150
	1    0    0    -1  
$EndComp
$Comp
L +BATT #PWR031
U 1 1 556314D7
P 3350 2450
F 0 "#PWR031" H 3350 2300 50  0001 C CNN
F 1 "+BATT" V 3350 2700 50  0000 C CNN
F 2 "" H 3350 2450 60  0000 C CNN
F 3 "" H 3350 2450 60  0000 C CNN
	1    3350 2450
	1    0    0    -1  
$EndComp
$Comp
L +3.3VP #PWR032
U 1 1 5563481C
P 5800 3850
F 0 "#PWR032" H 5950 3800 50  0001 C CNN
F 1 "+3.3VP" H 5800 3950 50  0000 C CNN
F 2 "" H 5800 3850 60  0000 C CNN
F 3 "" H 5800 3850 60  0000 C CNN
	1    5800 3850
	0    1    1    0   
$EndComp
Text Notes 4250 2300 0    100  ~ 0
3.3V supply
$Comp
L +BATT #PWR033
U 1 1 5569D9F3
P 4200 1300
F 0 "#PWR033" H 4200 1150 50  0001 C CNN
F 1 "+BATT" V 4200 1550 50  0000 C CNN
F 2 "" H 4200 1300 60  0000 C CNN
F 3 "" H 4200 1300 60  0000 C CNN
	1    4200 1300
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR034
U 1 1 5569DA18
P 4700 1300
F 0 "#PWR034" H 4700 1050 50  0001 C CNN
F 1 "GND" H 4600 1150 50  0000 C CNN
F 2 "" H 4700 1300 60  0000 C CNN
F 3 "" H 4700 1300 60  0000 C CNN
	1    4700 1300
	1    0    0    -1  
$EndComp
$Comp
L TESTPAD P11
U 1 1 5569DA9A
P 4200 1300
F 0 "P11" H 4200 1200 60  0000 C CNN
F 1 "Batt" H 4150 1400 60  0000 C CNN
F 2 "DonB:1pin" H 4200 1300 60  0001 C CNN
F 3 "" H 4200 1300 60  0000 C CNN
	1    4200 1300
	0    1    1    0   
$EndComp
$Comp
L TESTPAD P12
U 1 1 5569DB5B
P 4700 1300
F 0 "P12" H 4700 1150 60  0000 C CNN
F 1 "GND" H 4750 1400 60  0000 C CNN
F 2 "DonB:1pin" H 4700 1300 60  0001 C CNN
F 3 "" H 4700 1300 60  0000 C CNN
	1    4700 1300
	0    -1   -1   0   
$EndComp
Text Notes 4050 850  0    50   ~ 0
Battery: 5.5 - 10 volts
$Comp
L DIODESCH_12 D4
U 1 1 5569FF33
P 6150 1250
F 0 "D4" H 6150 1350 40  0000 C CNN
F 1 "SSB43" H 6050 1150 40  0000 C CNN
F 2 "DonB:Diode-SMB_Handsoldering" H 6150 1250 60  0001 C CNN
F 3 "" H 6150 1250 60  0000 C CNN
	1    6150 1250
	-1   0    0    1   
$EndComp
Wire Wire Line
	3100 4350 3100 4300
Wire Wire Line
	3100 3900 3100 3850
Wire Wire Line
	4550 3050 4600 3050
Wire Wire Line
	5400 3350 5600 3350
Wire Wire Line
	5400 3050 5600 3050
Wire Wire Line
	4300 3900 4300 3850
Wire Wire Line
	4650 3900 4650 3850
Wire Wire Line
	4650 4250 4650 4200
Wire Wire Line
	4300 4250 4300 4200
Wire Wire Line
	2500 3400 2500 3450
Wire Wire Line
	2500 3100 2500 3050
Wire Wire Line
	2800 2500 2850 2500
Connection ~ 4850 3850
Wire Wire Line
	4850 3700 4850 3850
Wire Wire Line
	5150 3700 5150 3550
Wire Wire Line
	4850 3550 4850 3350
Connection ~ 2800 2750
Wire Wire Line
	2800 2750 2800 2500
Connection ~ 3350 2500
Wire Wire Line
	3150 2500 3350 2500
Connection ~ 4050 3850
Connection ~ 2500 3050
Connection ~ 3350 2750
Wire Wire Line
	3150 2750 3350 2750
Connection ~ 4650 3850
Connection ~ 4300 3850
Connection ~ 3100 3850
Wire Wire Line
	3350 2450 3350 3150
Connection ~ 4400 4250
Wire Wire Line
	4400 4250 4400 4350
Wire Wire Line
	4300 4250 4650 4250
Wire Wire Line
	5600 3050 5600 3150
Wire Wire Line
	4900 3050 5100 3050
Wire Wire Line
	4550 3250 4550 3050
Wire Wire Line
	4400 3250 4550 3250
Wire Wire Line
	5600 3350 5600 3450
Connection ~ 4850 3350
Wire Wire Line
	4400 3350 5100 3350
Wire Wire Line
	3950 3850 5800 3850
Connection ~ 2850 3450
Wire Wire Line
	2850 3850 3350 3850
Wire Wire Line
	2850 3450 2850 3850
Wire Wire Line
	3200 3250 3500 3250
Wire Wire Line
	3200 3450 3200 3250
Wire Wire Line
	2500 3450 3200 3450
Wire Wire Line
	2500 3050 3500 3050
Wire Wire Line
	2700 2750 2850 2750
Wire Wire Line
	3500 3350 3500 3450
Wire Wire Line
	3350 3150 3500 3150
$Comp
L +BATT #PWR035
U 1 1 556A0C76
P 5950 1250
F 0 "#PWR035" H 5950 1100 50  0001 C CNN
F 1 "+BATT" V 5950 1500 50  0000 C CNN
F 2 "" H 5950 1250 60  0000 C CNN
F 3 "" H 5950 1250 60  0000 C CNN
	1    5950 1250
	1    0    0    -1  
$EndComp
$Comp
L GND #PWR036
U 1 1 556A0CA1
P 6350 1250
F 0 "#PWR036" H 6350 1000 50  0001 C CNN
F 1 "GND" H 6250 1100 50  0000 C CNN
F 2 "" H 6350 1250 60  0000 C CNN
F 3 "" H 6350 1250 60  0000 C CNN
	1    6350 1250
	1    0    0    -1  
$EndComp
Text Notes 5800 850  0    50   ~ 0
Reverse voltage protection\n(temporary)
$EndSCHEMATC