Version 4 SHEET 1 2124 2568 WIRE 2032 2016 1856 2016 WIRE 1856 2032 1856 2016 WIRE 2032 2032 2032 2016 WIRE 2032 2128 2032 2112 WIRE 1856 2144 1856 2112 WIRE 1856 2144 1360 2144 WIRE 1920 2144 1856 2144 WIRE 1856 2176 1856 2144 WIRE 1360 2224 1360 2144 WIRE 1376 2224 1360 2224 WIRE 1472 2224 1456 2224 WIRE 1504 2224 1472 2224 WIRE 1616 2224 1584 2224 WIRE 1648 2224 1616 2224 WIRE 1760 2224 1728 2224 WIRE 1792 2224 1760 2224 WIRE 1472 2256 1472 2224 WIRE 1616 2256 1616 2224 WIRE 1760 2256 1760 2224 WIRE 1856 2288 1856 2272 WIRE 1472 2336 1472 2320 WIRE 1616 2336 1616 2320 WIRE 1760 2336 1760 2320 FLAG 1856 2288 0 FLAG 1760 2336 0 FLAG 1616 2336 0 FLAG 1472 2336 0 FLAG 2032 2128 0 FLAG 1920 2144 OUT SYMBOL npn 1792 2176 R0 SYMATTR InstName Q1 SYMATTR Value 2N3904 SYMBOL res 1840 2016 R0 SYMATTR InstName R1 SYMATTR Value 20K SYMBOL res 1472 2208 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R2 SYMATTR Value {R} SYMBOL cap 1456 2320 M180 WINDOW 0 24 64 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C1 SYMATTR Value .1µ SYMBOL voltage 2032 2016 R0 SYMATTR InstName V1 SYMATTR Value 10 SYMBOL res 1600 2208 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value {R} SYMBOL res 1744 2208 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R4 SYMATTR Value {R} SYMBOL cap 1600 2320 M180 WINDOW 0 24 64 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C2 SYMATTR Value .1µ SYMBOL cap 1744 2320 M180 WINDOW 0 24 64 Left 2 WINDOW 3 24 8 Left 2 SYMATTR InstName C3 SYMATTR Value .1µ TEXT 1760 2408 Left 2 !.tran 100m startup TEXT 1296 2416 Left 2 !.options maxstep=.02m TEXT 1296 2392 Left 2 !.params R=10K TEXT 1624 2456 Top 1 ;This example schematic is supplied for informational/educational purposes only.