Version 4 SHEET 1 880 680 WIRE -176 352 -176 112 WIRE -176 416 -176 352 WIRE -176 528 -176 496 WIRE -176 544 -176 528 WIRE -144 400 -144 224 WIRE -128 528 -176 528 WIRE -128 528 -128 160 WIRE -112 160 -128 160 WIRE -112 224 -144 224 WIRE -112 288 -208 288 WIRE -112 352 -176 352 WIRE -16 432 -16 384 WIRE -16 528 -128 528 WIRE -16 528 -16 496 WIRE 128 112 -176 112 WIRE 128 160 112 160 WIRE 128 160 128 112 WIRE 128 352 112 352 WIRE 128 384 -16 384 WIRE 128 384 128 352 WIRE 160 224 112 224 WIRE 288 112 128 112 WIRE 288 128 288 112 WIRE 288 224 240 224 WIRE 288 224 288 208 WIRE 288 288 112 288 WIRE 288 288 288 224 WIRE 288 400 -144 400 WIRE 288 400 288 288 WIRE 288 432 288 400 WIRE 288 528 -16 528 WIRE 288 528 288 496 WIRE 336 288 288 288 FLAG -176 544 0 FLAG -208 288 Sqr IOPIN -208 288 Out FLAG 336 288 Ramp IOPIN 336 288 Out SYMBOL Robertugo\\555_ALL 48 272 R0 SYMATTR InstName U1 SYMBOL cap 272 432 R0 SYMATTR InstName Ct SYMATTR Value 1n SYMBOL cap -32 432 R0 SYMATTR InstName Cbp SYMATTR Value 10n SYMBOL res 272 112 R0 SYMATTR InstName Rton SYMATTR Value 47k SYMBOL voltage -176 400 R0 WINDOW 0 3 107 Left 0 WINDOW 3 -15 59 Left 0 SYMATTR InstName Vcc SYMATTR Value 12 SYMBOL res 256 208 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName Rtoff SYMATTR Value 20k TEXT -178 96 Left 0 !.tran 1m startup TEXT 128 96 Left 0 ;Rtoff