Version 4 SHEET 1 880 780 WIRE 160 160 48 160 WIRE 208 160 160 160 WIRE 240 160 208 160 WIRE 352 160 320 160 WIRE 400 160 352 160 WIRE 160 192 160 160 WIRE 48 272 48 160 WIRE 160 288 160 272 WIRE 400 288 400 160 WIRE 144 320 128 320 WIRE 240 336 192 336 WIRE 336 336 320 336 WIRE 144 352 128 352 WIRE 48 432 48 352 WIRE 160 432 160 384 WIRE 160 432 48 432 WIRE 400 432 400 384 WIRE 400 432 160 432 WIRE 160 496 48 496 WIRE 208 496 160 496 WIRE 240 496 208 496 WIRE 352 496 320 496 WIRE 400 496 352 496 WIRE 160 528 160 496 WIRE 48 608 48 496 WIRE 160 624 160 608 WIRE 400 624 400 496 WIRE 144 656 128 656 WIRE 240 672 192 672 WIRE 336 672 320 672 WIRE 144 688 128 688 WIRE 48 768 48 688 WIRE 160 768 160 720 WIRE 160 768 48 768 WIRE 400 768 400 720 WIRE 400 768 160 768 FLAG 48 432 0 FLAG 448 112 0 FLAG 128 320 0 FLAG 448 32 st FLAG 128 352 st FLAG 208 160 A FLAG 352 160 B FLAG 48 768 0 FLAG 128 656 0 FLAG 128 688 st FLAG 208 496 A1 FLAG 352 496 B1 SYMBOL voltage 48 256 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V1 SYMATTR Value 15 SYMBOL pnp 336 384 M180 SYMATTR InstName Q1 SYMATTR Value tip125 SYMATTR Prefix X SYMBOL res 336 320 R90 WINDOW 0 5 56 VBottom 2 WINDOW 3 27 56 VTop 2 SYMATTR InstName R2 SYMATTR Value 1k SYMBOL res 224 176 R270 WINDOW 0 27 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName RL SYMATTR Value 12 SYMBOL potv 160 336 M180 SYMATTR InstName U1 SYMATTR Value rtot=10k SYMBOL voltage 448 16 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName Vst SYMATTR Value 0 SYMBOL res 144 176 R0 SYMATTR InstName R1 SYMATTR Value 10k SYMBOL voltage 48 592 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V2 SYMATTR Value 18 SYMBOL pnp 336 720 M180 SYMATTR InstName Q2 SYMATTR Value tip125 SYMATTR Prefix X SYMBOL res 336 656 R90 WINDOW 0 5 56 VBottom 2 WINDOW 3 27 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 1k SYMBOL res 224 512 R270 WINDOW 0 27 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName RL1 SYMATTR Value 16 SYMBOL potv 160 672 M180 SYMATTR InstName U2 SYMATTR Value rtot=10k SYMBOL res 144 512 R0 SYMATTR InstName R4 SYMATTR Value 10k TEXT 48 80 Left 2 !.dc Vst 0 1 TEXT 48 40 Left 2 ;.lib http://www.onsemi.com/pub_link/Collateral/TIP125.LIB TEXT 48 64 Left 2 !.lib TIP125.LIB