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:3_LFO-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 Wire Wire Line 6050 2150 6250 2150 Wire Wire Line 6050 2500 6250 2500 Wire Wire Line 6050 2950 6250 2950 Wire Wire Line 5650 3050 5600 3050 Connection ~ 4900 2450 Connection ~ 6150 1950 Wire Wire Line 4900 1950 6150 1950 Wire Wire Line 4900 1950 4900 3050 Connection ~ 5650 2600 Connection ~ 6150 2350 Wire Wire Line 6150 2350 6050 2350 Connection ~ 6150 2700 Wire Wire Line 6150 2700 6050 2700 Wire Wire Line 6150 3150 6050 3150 Wire Wire Line 6150 1650 6150 3150 Connection ~ 5400 2450 Connection ~ 5650 2450 Wire Wire Line 5200 2450 5650 2450 Wire Wire Line 5650 2250 5650 3050 Connection ~ 4350 1650 Wire Wire Line 5900 1650 6150 1650 Connection ~ 3400 2650 Wire Wire Line 4350 2650 4350 2350 Wire Wire Line 4350 1650 4350 2050 Wire Wire Line 2100 2650 4350 2650 Wire Wire Line 2100 2300 2100 2650 Connection ~ 2100 1750 Connection ~ 3400 2250 Wire Wire Line 3250 2250 3250 2500 Wire Wire Line 3400 2250 3250 2250 Wire Wire Line 3400 2200 3400 2350 Connection ~ 3400 1750 Wire Wire Line 2100 1550 2100 2000 Connection ~ 4700 1650 Wire Wire Line 4700 1550 4700 1750 Wire Wire Line 4600 1650 4700 1650 Wire Wire Line 3300 1650 3400 1650 Connection ~ 3400 1650 Wire Wire Line 3400 1550 3400 1900 Text Notes 4350 4950 0 60 ~ 0 3: LOW FREQUENCY OSCILLATOR\n $Comp L R R19 U 1 1 5B292F87 P 2100 2150 F 0 "R19" H 2250 2200 50 0000 C CNN F 1 "10K" H 2250 2100 50 0000 C CNN F 2 "" V 2030 2150 50 0000 C CNN F 3 "" H 2100 2150 50 0000 C CNN 1 2100 2150 1 0 0 -1 $EndComp $Comp L 4001 IC4B U 4 1 5B282BB2 P 4000 1650 F 0 "IC4B" H 4000 1700 50 0000 C CNN F 1 "CD4001" H 4000 1600 50 0000 C CNN F 2 "" H 4000 1650 60 0001 C CNN F 3 "" H 4000 1650 60 0001 C CNN 4 4000 1650 1 0 0 -1 $EndComp $Comp L 4001 IC4A U 3 1 5B282AC1 P 2700 1650 F 0 "IC4A" H 2700 1700 50 0000 C CNN F 1 "CD4001" H 2700 1600 50 0000 C CNN F 2 "" H 2700 1650 60 0001 C CNN F 3 "" H 2700 1650 60 0001 C CNN 3 2700 1650 1 0 0 -1 $EndComp $Comp L 4001 IC4C U 2 1 5B282A16 P 5300 1650 F 0 "IC4C" H 5300 1700 50 0000 C CNN F 1 "CD4001" H 5300 1600 50 0000 C CNN F 2 "" H 5300 1650 60 0001 C CNN F 3 "" H 5300 1650 60 0001 C CNN 2 5300 1650 1 0 0 -1 $EndComp $Comp L POT R44 U 1 1 5B28746C P 3400 2500 F 0 "R44" H 3250 2450 50 0000 C CNN F 1 "250K" H 3250 2550 50 0000 C CNN F 2 "" H 3400 2500 50 0000 C CNN F 3 "" H 3400 2500 50 0000 C CNN 1 3400 2500 -1 0 0 1 $EndComp $Comp L R R20 U 1 1 5B28730B P 3400 2050 F 0 "R20" H 3550 2100 50 0000 C CNN F 1 "330" H 3550 2000 50 0000 C CNN F 2 "" V 3330 2050 50 0000 C CNN F 3 "" H 3400 2050 50 0000 C CNN 1 3400 2050 1 0 0 -1 $EndComp $Comp L CP1 C8 U 1 1 5B28721C P 4350 2200 F 0 "C8" H 4375 2300 50 0000 L CNN F 1 "1µ" H 4375 2100 50 0000 L CNN F 2 "" H 4350 2200 50 0000 C CNN F 3 "" H 4350 2200 50 0000 C CNN 1 4350 2200 1 0 0 -1 $EndComp $Comp L D D3 U 1 1 5B2868A8 P 5050 3050 F 0 "D3" H 5050 3150 50 0000 C CNN F 1 "1N914" H 5050 2950 50 0000 C CNN F 2 "" H 5050 3050 50 0000 C CNN F 3 "" H 5050 3050 50 0000 C CNN 1 5050 3050 1 0 0 -1 $EndComp $Comp L R R21 U 1 1 5B2863A4 P 5050 2450 F 0 "R21" V 5130 2450 50 0000 C CNN F 1 "4.7K" V 5050 2450 50 0000 C CNN F 2 "" V 4980 2450 50 0000 C CNN F 3 "" H 5050 2450 50 0000 C CNN 1 5050 2450 0 1 1 0 $EndComp $Comp L Earth #PWR? U 1 1 5B2857C6 P 5400 2750 F 0 "#PWR?" H 5400 2500 50 0001 C CNN F 1 "Earth" H 5400 2600 50 0001 C CNN F 2 "" H 5400 2750 50 0000 C CNN F 3 "" H 5400 2750 50 0000 C CNN 1 5400 2750 1 0 0 -1 $EndComp $Comp L CP1 C9 U 1 1 5B2856B2 P 5400 2600 F 0 "C9" H 5425 2700 50 0000 L CNN F 1 "10µ" H 5425 2500 50 0000 L CNN F 2 "" H 5400 2600 50 0000 C CNN F 3 "" H 5400 2600 50 0000 C CNN 1 5400 2600 1 0 0 -1 $EndComp $Comp L SW_SPST S9 U 1 1 5B285356 P 5400 3050 F 0 "S9" H 5400 3175 50 0000 C CNN F 1 "SPST" H 5400 3250 50 0000 C CNN F 2 "" H 5400 3050 50 0000 C CNN F 3 "" H 5400 3050 50 0000 C CNN 1 5400 3050 -1 0 0 1 $EndComp $Comp L SW_SPDT S12 U 1 1 5B284CC7 P 5850 2250 F 0 "S12" H 5900 2250 50 0000 C CNN F 1 "SPDT" H 5750 2350 50 0000 C CNN F 2 "" H 5850 2250 50 0000 C CNN F 3 "" H 5850 2250 50 0000 C CNN 1 5850 2250 1 0 0 -1 $EndComp $Comp L SW_SPDT S11 U 1 1 5B284C3D P 5850 2600 F 0 "S11" H 5900 2600 50 0000 C CNN F 1 "SPDT" H 5750 2700 50 0000 C CNN F 2 "" H 5850 2600 50 0000 C CNN F 3 "" H 5850 2600 50 0000 C CNN 1 5850 2600 1 0 0 -1 $EndComp $Comp L SW_SPDT S10 U 1 1 5B284B92 P 5850 3050 F 0 "S10" H 5900 3050 50 0000 C CNN F 1 "SPDT" H 5750 3150 50 0000 C CNN F 2 "" H 5850 3050 50 0000 C CNN F 3 "" H 5850 3050 50 0000 C CNN 1 5850 3050 1 0 0 -1 $EndComp Text GLabel 6250 2500 2 60 Input ~ 0 VCO? Text GLabel 6250 2150 2 60 Input ~ 0 VCF? Text GLabel 6250 2950 2 60 Input ~ 0 LFO-OUT $EndSCHEMATC