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 4 4 Title "NavSpark MicroAPRS balloon radio" Date "" Rev "" Comp "" Comment1 "Donald Bindner" Comment2 "" Comment3 "" Comment4 "" $EndDescr Text GLabel 3100 2200 0 50 Input ~ 0 af_out $Comp L C C13 U 1 1 5567A0D4 P 3550 2200 F 0 "C13" H 3575 2300 50 0000 L CNN F 1 "1uF" H 3575 2100 50 0000 L CNN F 2 "DonB:C_0805_HandSoldering" H 3588 2050 30 0001 C CNN F 3 "" H 3550 2200 60 0000 C CNN 1 3550 2200 0 1 1 0 $EndComp $Comp L R R19 U 1 1 5567A0F8 P 4000 1950 F 0 "R19" V 4080 1950 50 0000 C CNN F 1 "100K" V 4000 1950 50 0000 C CNN F 2 "DonB:R_0805_HandSoldering" V 3930 1950 30 0001 C CNN F 3 "" H 4000 1950 30 0000 C CNN 1 4000 1950 1 0 0 -1 $EndComp $Comp L R R20 U 1 1 5567A128 P 4000 2450 F 0 "R20" V 4080 2450 50 0000 C CNN F 1 "100K" V 4000 2450 50 0000 C CNN F 2 "DonB:R_0805_HandSoldering" V 3930 2450 30 0001 C CNN F 3 "" H 4000 2450 30 0000 C CNN 1 4000 2450 1 0 0 -1 $EndComp Text GLabel 4300 2200 2 50 Input ~ 0 sig_in_off Wire Wire Line 3100 2200 3400 2200 Wire Wire Line 3700 2200 4300 2200 Wire Wire Line 4000 2100 4000 2300 Connection ~ 4000 2200 $Comp L +3.3VP #PWR036 U 1 1 5567AC43 P 4000 1700 F 0 "#PWR036" H 4150 1650 50 0001 C CNN F 1 "+3.3VP" H 4000 1800 50 0000 C CNN F 2 "" H 4000 1700 60 0000 C CNN F 3 "" H 4000 1700 60 0000 C CNN 1 4000 1700 1 0 0 -1 $EndComp $Comp L GND #PWR037 U 1 1 5567AC49 P 4000 2700 F 0 "#PWR037" H 4000 2450 50 0001 C CNN F 1 "GND" H 3900 2600 50 0000 C CNN F 2 "" H 4000 2700 60 0000 C CNN F 3 "" H 4000 2700 60 0000 C CNN 1 4000 2700 1 0 0 -1 $EndComp Wire Wire Line 4000 1700 4000 1800 Wire Wire Line 4000 2600 4000 2700 Text Notes 2750 1400 0 100 ~ 0 Optional Radio Audio Output $EndSCHEMATC