* Z:\tmp\asc_dec_bjh7r6w2\094879f4dfa4_Lighthouse_Sensor_Alan_Yates_Twitter_dec0.asc
* Generated by LTspice 26.0.1 for Windows.
Q4 N020 N014 N011 0 2N3906
R7 N005 N019 15k
Q3 N013 N019 N026 0 2N3904
C4 N026 N028 1n
C12 N012 0 100n
R9 N026 N028 1k
Q5 N015 N021 N030 0 2N3904
C8 N004 0 100n
R26 N004 N003 10k
R25 N022 N024 100k
R17 N006 N016 56k
R16 N021 N029 12k
Q6 N023 N016 N006 0 2N3906
C1 N010 N009 1n
R19 OUT N022 33R
D1 N018 N009 DP
R3 N018 N027 8k2
.model D D
.lib C:\users\khalils\AppData\Local\LTspice\lib\cmp\standard.dio
.model NPN NPN
.model PNP PNP
.lib C:\users\khalils\AppData\Local\LTspice\lib\cmp\standard.bjt
.backanno
.end

* LTspice schematic (.asc):
Version 4
SHEET 1 2772 700
WIRE 48 -112 -640 -112
WIRE 880 -112 48 -112
WIRE 48 -80 48 -112
WIRE 1648 -80 1648 -112
WIRE -224 32 -352 32
WIRE -32 32 -144 32
WIRE 48 32 48 0
WIRE 48 32 -32 32
WIRE 112 32 48 32
WIRE 240 32 112 32
WIRE 384 32 240 32
WIRE 608 32 544 32
WIRE 752 32 608 32
WIRE 880 32 752 32
WIRE 1648 32 1648 0
WIRE 1648 32 1456 32
WIRE 1760 32 1648 32
WIRE 1888 32 1760 32
WIRE 1952 32 1888 32
WIRE 2368 32 2208 32
WIRE 384 64 384 32
WIRE 544 64 544 32
WIRE 752 64 752 32
WIRE 1952 64 1952 32
WIRE 2208 64 2208 32
WIRE 1760 112 1760 32
WIRE 976 144 976 32
WIRE -544 160 -544 128
WIRE 384 160 384 128
WIRE 544 160 544 128
WIRE 1952 160 1952 128
WIRE -352 176 -352 144
WIRE -160 176 -352 176
WIRE 352 176 -96 176
WIRE 1120 176 1120 144
WIRE 1264 176 1120 176
WIRE 2208 176 2208 144
WIRE 2208 176 2112 176
WIRE 2304 176 2208 176
WIRE -352 208 -352 176
WIRE -352 208 -416 208
WIRE -288 208 -352 208
WIRE 1120 208 1120 176
WIRE 1264 208 1264 176
WIRE 1888 208 1888 32
WIRE 2112 208 2112 176
WIRE 2208 208 2208 176
WIRE 240 224 240 32
WIRE -416 240 -416 208
WIRE -352 240 -352 208
WIRE -288 240 -288 208
WIRE 608 240 608 32
WIRE 752 256 752 144
WIRE 848 256 752 256
WIRE 976 256 976 224
WIRE 976 256 912 256
WIRE 1056 256 976 256
WIRE 1456 256 1456 32
WIRE 1648 256 1616 256
WIRE 1760 256 1760 192
WIRE 1760 256 1728 256
WIRE 1824 256 1760 256
WIRE -32 272 -32 32
WIRE 112 272 112 144
WIRE 176 272 112 272
WIRE 976 288 976 256
WIRE 752 304 752 256
WIRE 1264 304 1264 272
WIRE 1616 320 1616 256
WIRE 1760 320 1760 256
WIRE 2112 320 2112 272
WIRE 2128 320 2112 320
WIRE 2208 320 2208 288
WIRE 112 336 112 272
WIRE 2368 336 2368 32
WIRE -416 352 -416 320
WIRE -352 352 -352 304
WIRE -352 352 -416 352
WIRE -288 352 -288 320
WIRE -288 352 -352 352
WIRE 352 352 352 176
WIRE 432 352 352 352
WIRE 608 352 608 320
WIRE 608 352 496 352
WIRE 688 352 608 352
WIRE 1120 368 1120 304
WIRE 1296 368 1120 368
WIRE 1456 368 1456 336
WIRE 1456 368 1360 368
WIRE 1552 368 1456 368
WIRE 2304 368 2304 176
WIRE 2336 368 2304 368
WIRE -352 384 -352 352
WIRE -32 384 -32 352
WIRE -32 384 -352 384
WIRE 48 384 -32 384
WIRE 608 384 608 352
WIRE 2480 384 2416 384
WIRE 2512 384 2480 384
WIRE 2656 384 2592 384
WIRE 1456 400 1456 368
WIRE 1888 400 1888 304
WIRE 1968 400 1888 400
WIRE 2304 400 2048 400
WIRE 2336 400 2304 400
WIRE -32 416 -32 384
WIRE 112 464 112 432
WIRE 176 464 112 464
WIRE 752 464 752 400
WIRE 752 464 704 464
WIRE 800 464 752 464
WIRE 2368 464 2368 432
WIRE 704 496 704 464
WIRE 800 496 800 464
WIRE 1120 496 1120 368
WIRE 1888 496 1888 400
WIRE 2304 544 2304 400
WIRE 2352 544 2304 544
WIRE 2480 544 2480 384
WIRE 2480 544 2432 544
WIRE -32 608 -32 496
WIRE 608 608 608 464
WIRE 608 608 176 608
WIRE 704 608 704 576
WIRE 704 608 608 608
WIRE 800 608 800 560
WIRE 800 608 704 608
WIRE 976 608 976 368
WIRE 976 608 800 608
WIRE 1120 608 976 608
WIRE 1456 608 1456 480
WIRE 1616 608 1616 416
WIRE 1760 608 1760 384
SYMBOL pnp 1056 304 M180
SYMATTR InstName Q4
SYMATTR Value 2N3906
SYMBOL res 592 224 R0
SYMATTR InstName R7
SYMATTR Value 15k
SYMBOL npn 688 304 R0
WINDOW 0 74 32 Left 2
WINDOW 3 73 68 Left 2
SYMATTR InstName Q3
SYMATTR Value 2N3904
SYMBOL cap 784 496 R0
SYMATTR InstName C4
SYMATTR Value 1n
SYMBOL cap 2096 208 R0
SYMATTR InstName C12
SYMATTR Value 100n
SYMBOL res 688 480 R0
SYMATTR InstName R9
SYMATTR Value 1k
SYMBOL npn 1552 320 R0
WINDOW 0 74 32 Left 2
WINDOW 3 73 68 Left 2
SYMATTR InstName Q5
SYMATTR Value 2N3904
SYMBOL cap 368 64 R0
SYMATTR InstName C8
SYMATTR Value 100n
SYMBOL res -128 16 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R26
SYMATTR Value 10k
SYMBOL res 2448 528 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R25
SYMATTR Value 100k
SYMBOL res 1744 96 R0
SYMATTR InstName R17
SYMATTR Value 56k
SYMBOL res 1440 384 R0
SYMATTR InstName R16
SYMATTR Value 12k
SYMBOL pnp 1824 304 M180
SYMATTR InstName Q6
SYMATTR Value 2N3906
SYMBOL cap -96 160 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 1n
SYMBOL res 2608 368 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R19
SYMATTR Value 33R
SYMBOL diode -368 304 M180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value DP
SYMBOL res -48 400 R0
SYMATTR InstName R3
SYMATTR Value 8k2
FLAG 2656 384 OUT
FLAG -544 160 0
FLAG 384 160 0
FLAG 544 160 0
FLAG 1264 304 0
FLAG 1952 160 0
FLAG 2368 464 0
FLAG 2208 320 0
FLAG 2112 320 0