Version 4
SHEET 1 1552 948
WIRE -608 -320 -752 -320
WIRE -448 -320 -608 -320
WIRE -752 -256 -752 -320
WIRE -528 -240 -672 -240
WIRE -608 -160 -608 -320
WIRE -672 -144 -672 -240
WIRE -640 -144 -672 -144
WIRE -528 -128 -528 -240
WIRE -528 -128 -576 -128
WIRE 0 -128 -528 -128
WIRE 160 -128 80 -128
WIRE 320 -128 160 -128
WIRE 800 -128 320 -128
WIRE 1072 -128 800 -128
WIRE -864 -112 -896 -112
WIRE -752 -112 -752 -176
WIRE -752 -112 -800 -112
WIRE -640 -112 -752 -112
WIRE 160 -96 160 -128
WIRE 320 -96 320 -128
WIRE -448 -64 -448 -320
WIRE -752 -48 -752 -112
WIRE -672 -48 -672 -144
WIRE -672 64 -672 32
WIRE -448 64 -448 16
WIRE -448 64 -672 64
WIRE 160 64 160 -16
WIRE 160 64 -448 64
WIRE 640 64 160 64
WIRE 1072 64 640 64
WIRE -448 96 -448 64
WIRE 640 112 640 64
WIRE 800 112 800 -128
WIRE -32 128 -208 128
WIRE -64 160 -128 160
WIRE 160 160 160 64
WIRE 160 160 32 160
WIRE 368 160 160 160
WIRE -64 192 -64 160
WIRE -32 192 -32 128
WIRE 32 192 32 160
WIRE -752 224 -752 32
WIRE -608 224 -608 -96
WIRE -608 224 -752 224
WIRE -448 224 -448 176
WIRE -448 224 -608 224
WIRE -208 240 -208 128
WIRE 16 288 16 256
WIRE 320 288 320 -16
WIRE 320 288 16 288
WIRE 368 288 320 288
WIRE 800 304 800 192
WIRE 896 304 800 304
WIRE 1072 304 976 304
WIRE -208 352 -208 320
WIRE -128 352 -128 160
WIRE -128 352 -208 352
WIRE 240 384 80 384
WIRE 320 384 320 288
WIRE 320 384 240 384
WIRE 368 384 320 384
WIRE 320 416 320 384
WIRE 640 416 640 192
WIRE 896 416 640 416
WIRE 1072 416 976 416
WIRE 80 448 80 384
WIRE -896 512 -896 -112
WIRE 320 528 320 496
WIRE 896 528 320 528
WIRE 1072 528 976 528
WIRE 240 544 240 384
WIRE 320 560 320 528
WIRE 640 560 640 416
WIRE 800 560 800 304
WIRE -896 672 -896 592
WIRE 80 672 80 528
WIRE 80 672 -896 672
WIRE 240 672 240 608
WIRE 240 672 80 672
WIRE 320 672 320 640
WIRE 320 672 240 672
WIRE 640 672 640 640
WIRE 640 672 320 672
WIRE 800 672 800 640
WIRE 800 672 640 672
WIRE 80 688 80 672
FLAG 1072 -128 Y
FLAG 1072 64 X
FLAG 368 384 5V
FLAG 1072 304 Y_div
FLAG 1072 416 X_div
FLAG 1072 528 5V_div
FLAG 368 288 probe2
FLAG 368 160 probe1
FLAG 80 688 0
SYMBOL voltage -896 496 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName uC_PWM_sinus_met_filter
SYMATTR Value SINE(1.65V 1.45V 50Hz)
SYMBOL res -16 -144 M90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL res 144 -112 R0
SYMATTR InstName R2
SYMATTR Value 330
SYMBOL res 304 -112 R0
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL res 304 544 R0
SYMATTR InstName R5
SYMATTR Value 150k
SYMBOL res 656 544 M0
SYMATTR InstName R6
SYMATTR Value 150k
SYMBOL res 816 544 M0
SYMATTR InstName R7
SYMATTR Value 150k
SYMBOL res 304 400 R0
SYMATTR InstName R9
SYMATTR Value 220k
SYMBOL res 624 96 R0
SYMATTR InstName R10
SYMATTR Value 220k
SYMBOL res 784 96 R0
SYMATTR InstName R11
SYMATTR Value 220k
SYMBOL cap 256 544 M0
SYMATTR InstName C4
SYMATTR Value 100n
SYMBOL _PERSONAL\\relays\\rly_spst-no 16 224 R90
SYMATTR InstName U3
SYMBOL voltage -208 224 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V4
SYMATTR Value PULSE(0 12V 100ms 1p 1p 500m 1000m)
SYMBOL voltage 80 432 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 5V
SYMBOL res 880 288 M90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R13
SYMATTR Value 10k
SYMBOL res 880 400 M90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R14
SYMATTR Value 10k
SYMBOL res 880 512 M90
WINDOW 0 5 56 VBottom 2
WINDOW 3 27 56 VTop 2
SYMATTR InstName R15
SYMATTR Value 10k
SYMBOL voltage -448 -80 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 9V
SYMBOL cap -864 -128 M90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 100n
SYMBOL voltage -448 80 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V5
SYMATTR Value 9V
SYMBOL _PERSONAL\\opamps\\LM324 -608 -192 R0
SYMATTR InstName U2
SYMBOL res -736 -272 M0
SYMATTR InstName R4
SYMATTR Value 470k
SYMBOL res -736 -64 M0
SYMATTR InstName R8
SYMATTR Value 470k
TEXT 464 -24 Left 2 !.tran 0 1100m 100ms
TEXT -208 376 Left 2 ;shorting probes\nfor simulation only
TEXT 392 -288 Left 2 ;Running this simulation requires additional LTSpice components \nfrom: https://github.com/HenniePeters/LTSpice
TEXT -160 -376 Left 2 ;Octo curve tracer\n \nThe idea to start this project\ncame from ' Chris's Workbench'\nhttps://youtu.be/-ONZejEdrSc
TEXT 824 -24 Left 2 ;oscilloscope X and Y connections
TEXT 720 360 Left 2 ;Microcontroller connections for 3.3V logic