Version 4
SHEET 1 2364 680
WIRE 912 -128 0 -128
WIRE 1008 -128 976 -128
WIRE 1024 -128 1008 -128
WIRE 912 -96 752 -96
WIRE 1344 -64 1216 -64
WIRE 1408 -64 1344 -64
WIRE 576 -48 528 -48
WIRE 640 -48 576 -48
WIRE 0 -32 0 -128
WIRE 64 -32 0 -32
WIRE 160 -32 128 -32
WIRE 240 -32 160 -32
WIRE 464 -32 240 -32
WIRE 640 -16 592 -16
WIRE 752 -16 752 -96
WIRE 752 -16 704 -16
WIRE 1216 -16 1216 -64
WIRE 1344 16 1344 -64
WIRE 320 64 256 64
WIRE 480 64 384 64
WIRE 592 64 592 -16
WIRE 592 64 560 64
WIRE 1216 112 1216 64
WIRE 1264 112 1216 112
WIRE 1344 112 1344 80
WIRE 1344 112 1264 112
WIRE 1696 112 1584 112
WIRE 1856 112 1776 112
WIRE 2144 112 2032 112
WIRE 2304 112 2224 112
WIRE 0 144 0 -32
WIRE 0 144 -48 144
WIRE 64 144 0 144
WIRE 160 144 160 -32
WIRE 160 144 144 144
WIRE 256 144 256 64
WIRE 400 144 256 144
WIRE 544 144 480 144
WIRE 592 144 592 64
WIRE 592 144 544 144
WIRE 1216 160 1216 112
WIRE 1408 176 1408 -64
WIRE 1584 176 1584 112
WIRE 2032 176 2032 112
WIRE 1008 208 1008 -128
WIRE 1056 208 1008 208
WIRE 1152 208 1136 208
WIRE 1856 208 1856 112
WIRE 2304 208 2304 112
WIRE 464 272 384 272
WIRE 592 272 592 144
WIRE 592 272 528 272
WIRE 256 288 256 144
WIRE 320 288 256 288
WIRE -48 304 -48 144
WIRE 160 320 160 144
WIRE 256 320 256 288
WIRE 1216 336 1216 256
WIRE 1408 336 1408 256
WIRE 1408 336 1216 336
WIRE 1584 336 1584 256
WIRE 1584 336 1408 336
WIRE 1856 336 1856 272
WIRE 1856 336 1584 336
WIRE 2032 336 2032 256
WIRE 2032 336 1856 336
WIRE 2304 336 2304 272
WIRE 2304 336 2032 336
WIRE 1408 352 1408 336
WIRE -48 416 -48 384
WIRE 160 416 160 384
WIRE 160 416 -48 416
WIRE 256 416 256 384
WIRE 256 416 160 416
WIRE -48 432 -48 416
FLAG -48 432 0
FLAG -48 144 In
FLAG 544 144 Freq
FLAG 1024 -128 Out
FLAG 576 -48 Start
FLAG 240 -32 StartRC
FLAG 1408 352 0
FLAG 1264 112 Col
FLAG 1216 -64 Rel
FLAG 1856 112 Pow
FLAG 2304 112 RelAvg
SYMBOL voltage -48 288 R0
WINDOW 3 -143 186 Left 2
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR Value PULSE(0 5 .1 10n 10n 3 4)
SYMATTR InstName V1
SYMBOL cap 144 320 R0
SYMATTR InstName C1
SYMATTR Value 1µ
SYMBOL res 160 128 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1Meg
SYMBOL Digital\\and 672 -96 R0
WINDOW 3 -304 115 Invisible 2
SYMATTR Value Vhigh=4.9 Vlow=.1
SYMATTR InstName A2
SYMBOL Digital\\and 496 192 R0
WINDOW 3 -48 132 Left 2
SYMATTR Value Vhigh=4.9 Vlow=.1 Td=10n
SYMATTR InstName A3
SYMBOL res 496 128 R90
WINDOW 0 47 104 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 10k
SYMBOL cap 240 320 R0
SYMATTR InstName C2
SYMATTR Value 10µ
SYMATTR SpiceLine Rser=10m Lser=5n
SYMBOL Digital\\schmitt 320 224 R0
SYMATTR InstName A4
SYMATTR Value2 Vhigh=4.9 Vlow=.1 Vt=2.4 Vh=.5
SYMBOL Digital\\schmitt 464 -96 R0
SYMATTR InstName A5
SYMATTR Value2 Vhigh=4.9 Vlow=.1 Vt=2.4 Vh=.5
SYMBOL Digital\\and 944 -176 R0
WINDOW 3 -175 125 Left 2
SYMATTR Value Vhigh=4.9 Vlow=.1
SYMATTR InstName A6
SYMBOL diode 128 -48 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D1
SYMATTR Value 1N4148
SYMBOL npn 1152 160 R0
SYMATTR InstName Q1
SYMATTR Value BC546B
SYMBOL res 1152 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 1k
SYMBOL ind 1200 -32 R0
SYMATTR InstName L1
SYMATTR Value 1
SYMATTR SpiceLine Rser=700
SYMBOL voltage 1408 160 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V2
SYMATTR Value 24
SYMBOL bv 1584 160 R0
SYMATTR InstName B1
SYMATTR Value V=V(Rel,Col)*I(L1)
SYMBOL res 1792 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL cap 1840 208 R0
SYMATTR InstName C3
SYMATTR Value 20µ
SYMBOL diode 1360 80 R180
WINDOW 0 24 64 Left 2
WINDOW 3 -27 -49 Left 2
SYMATTR InstName D2
SYMATTR Value 1N4148
SYMBOL bv 2032 160 R0
SYMATTR InstName B2
SYMATTR Value V=V(Rel,Col)
SYMBOL res 2240 96 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 10k
SYMBOL cap 2288 208 R0
SYMATTR InstName C4
SYMATTR Value 20µ
SYMBOL res 576 48 R90
WINDOW 0 47 104 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 10k
SYMBOL diode 320 80 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName D3
SYMATTR Value 1N4148
TEXT -112 496 Left 2 !.tran 0 5 0 1m
TEXT 264 408 Left 2 ;Use 4n7 for about 32kHz