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:switches
LIBS:74xgxx
LIBS:ac-dc
LIBS:actel
LIBS:allegro
LIBS:Altera
LIBS:analog_devices
LIBS:battery_management
LIBS:bbd
LIBS:brooktre
LIBS:cmos_ieee
LIBS:dc-dc
LIBS:diode
LIBS:elec-unifil
LIBS:ESD_Protection
LIBS:ftdi
LIBS:gennum
LIBS:graphic
LIBS:hc11
LIBS:ir
LIBS:Lattice
LIBS:logo
LIBS:maxim
LIBS:mechanical
LIBS:microchip_dspic33dsc
LIBS:microchip_pic10mcu
LIBS:microchip_pic12mcu
LIBS:microchip_pic16mcu
LIBS:microchip_pic18mcu
LIBS:microchip_pic32mcu
LIBS:motor_drivers
LIBS:motors
LIBS:msp430
LIBS:nordicsemi
LIBS:nxp_armmcu
LIBS:onsemi
LIBS:Oscillators
LIBS:powerint
LIBS:Power_Management
LIBS:pspice
LIBS:references
LIBS:relays
LIBS:rfcom
LIBS:sensors
LIBS:silabs
LIBS:stm8
LIBS:stm32
LIBS:supertex
LIBS:transf
LIBS:ttl_ieee
LIBS:video
LIBS:wiznet
LIBS:Worldsemi
LIBS:Xicor
LIBS:zetex
LIBS:Zilog
LIBS:6_NOISE-cache
EELAYER 25 0
EELAYER END
$Descr User 8858 6299
encoding utf-8
Sheet 1 1
Title ""
Date ""
Rev ""
Comp ""
Comment1 ""
Comment2 ""
Comment3 ""
Comment4 ""
$EndDescr
$Comp
L 2SC1941 Q1
U 1 1 5B2AB675
P 3000 3000
F 0 "Q1" H 2700 2750 50  0000 L CNN
F 1 "2N3904" H 2600 2850 50  0000 L CNN
F 2 "" H 3200 2925 50  0000 L CIN
F 3 "" H 3000 3000 50  0000 L CNN
	1    3000 3000
	1    0    0    1   
$EndComp
$Comp
L Earth #PWR?
U 1 1 5B2AC492
P 2700 3100
F 0 "#PWR?" H 2700 2850 50  0001 C CNN
F 1 "Earth" H 2700 2950 50  0001 C CNN
F 2 "" H 2700 3100 50  0000 C CNN
F 3 "" H 2700 3100 50  0000 C CNN
	1    2700 3100
	1    0    0    -1  
$EndComp
$Comp
L Earth #PWR?
U 1 1 5B2AC5C0
P 4100 3150
F 0 "#PWR?" H 4100 2900 50  0001 C CNN
F 1 "Earth" H 4100 3000 50  0001 C CNN
F 2 "" H 4100 3150 50  0000 C CNN
F 3 "" H 4100 3150 50  0000 C CNN
	1    4100 3150
	1    0    0    -1  
$EndComp
$Comp
L +9V #PWR?
U 1 1 5B2AC866
P 3100 2350
F 0 "#PWR?" H 3100 2200 50  0001 C CNN
F 1 "+9V" H 3100 2490 50  0000 C CNN
F 2 "" H 3100 2350 50  0000 C CNN
F 3 "" H 3100 2350 50  0000 C CNN
	1    3100 2350
	1    0    0    -1  
$EndComp
Text Notes 2850 2300 0    60   ~ 0
+18V\n
$Comp
L R R1
U 1 1 5B2ACAAF
P 3100 2550
F 0 "R1" H 3250 2600 50  0000 C CNN
F 1 "1MEG" H 3250 2500 50  0000 C CNN
F 2 "" V 3030 2550 50  0000 C CNN
F 3 "" H 3100 2550 50  0000 C CNN
	1    3100 2550
	1    0    0    -1  
$EndComp
$Comp
L R R3
U 1 1 5B2ACBE5
P 4000 2800
F 0 "R3" V 4080 2800 50  0000 C CNN
F 1 "2.2K" V 4000 2800 50  0000 C CNN
F 2 "" V 3930 2800 50  0000 C CNN
F 3 "" H 4000 2800 50  0000 C CNN
	1    4000 2800
	0    1    1    0   
$EndComp
$Comp
L R R4
U 1 1 5B2ACD40
P 4500 2350
F 0 "R4" V 4580 2350 50  0000 C CNN
F 1 "100K" V 4500 2350 50  0000 C CNN
F 2 "" V 4430 2350 50  0000 C CNN
F 3 "" H 4500 2350 50  0000 C CNN
	1    4500 2350
	0    1    1    0   
$EndComp
$Comp
L CP1 C3
U 1 1 5B2ACE88
P 3550 2800
F 0 "C3" V 3800 2750 50  0000 L CNN
F 1 ".02µ" V 3700 2700 50  0000 L CNN
F 2 "" H 3550 2800 50  0000 C CNN
F 3 "" H 3550 2800 50  0000 C CNN
	1    3550 2800
	0    -1   -1   0   
$EndComp
$Comp
L LM2902N IC2
U 3 1 5B2AD2A1
P 4550 2900
F 0 "IC2" H 4550 3100 50  0000 L CNN
F 1 "LM3900" H 4550 3200 50  0000 L CNN
F 2 "" H 4500 3000 50  0000 C CNN
F 3 "" H 4600 3100 50  0000 C CNN
	3    4550 2900
	1    0    0    1   
$EndComp
Text GLabel 5000 2900 2    60   Input ~ 0
NOISE-VOL-POT
Wire Wire Line
	2700 3100 2700 3000
Wire Wire Line
	2700 3000 2800 3000
Text Notes 2700 3350 0    60   ~ 0
CUT COLLECTOR LEAD\n
Wire Wire Line
	3100 2800 3100 2700
Wire Wire Line
	3100 2800 3400 2800
Wire Wire Line
	3700 2800 3850 2800
Wire Wire Line
	4150 2800 4250 2800
Wire Wire Line
	4250 3000 4100 3000
Wire Wire Line
	4100 3000 4100 3150
Wire Wire Line
	4850 2900 5000 2900
Wire Wire Line
	4250 2800 4250 2350
Wire Wire Line
	4250 2350 4350 2350
Wire Wire Line
	4650 2350 4900 2350
Wire Wire Line
	4900 2350 4900 2900
Connection ~ 4900 2900
Wire Wire Line
	3100 2400 3100 2350
Text Notes 4200 3100 0    60   ~ 0
12
Text Notes 4250 2850 0    60   ~ 0
11
Text Notes 4750 3000 0    60   ~ 0
10
Text Notes 4400 4900 0    60   ~ 0
6: NOISE GENERATOR
$EndSCHEMATC