Version 4 SHEET 1 3172 1080 WIRE 2512 176 2512 144 WIRE 2160 256 2064 256 WIRE 2512 288 2512 256 WIRE 2512 288 2432 288 WIRE 2608 288 2512 288 WIRE 2512 304 2512 288 WIRE 2608 304 2608 288 WIRE 2160 320 2144 320 WIRE 2432 320 2432 288 WIRE 2432 320 2384 320 WIRE 2144 352 2144 320 WIRE 2416 352 2144 352 WIRE 1968 384 1952 384 WIRE 2160 384 1968 384 WIRE 2416 384 2416 352 WIRE 2416 384 2384 384 WIRE 2512 384 2416 384 WIRE 2608 384 2608 368 WIRE 2608 384 2512 384 WIRE 2512 432 2512 384 WIRE 1968 448 1968 384 WIRE 2432 448 2384 448 WIRE 2432 464 2432 448 WIRE 2064 560 2064 256 WIRE 2432 560 2432 528 WIRE 2432 560 2064 560 WIRE 2512 560 2512 496 WIRE 2512 560 2432 560 WIRE 2560 560 2512 560 WIRE 2768 560 2768 528 WIRE 2880 560 2880 528 WIRE 2880 560 2768 560 WIRE 2880 576 2880 560 WIRE 1968 592 1968 528 WIRE 1968 592 1952 592 WIRE 2128 592 1968 592 WIRE 2128 624 2128 592 FLAG 2880 576 0 FLAG 2768 448 +v1 FLAG 2880 448 -4v FLAG 2128 624 0 FLAG 2512 144 +v1 FLAG 2160 448 +v1 FLAG 2384 256 +v1 FLAG 1952 384 out1 FLAG 2560 560 -4v SYMBOL Misc\\battery 2768 432 R0 WINDOW 0 33 26 Left 0 WINDOW 3 13 107 Left 0 SYMATTR InstName V2 SYMATTR Value 4v SYMBOL Misc\\battery 2880 544 R180 WINDOW 0 -49 90 Left 0 WINDOW 3 -34 3 Left 0 SYMATTR InstName V3 SYMATTR Value 4v SYMBOL Timers\\NE555 2272 352 R0 SYMATTR InstName U1 SYMBOL res 2496 160 R0 SYMATTR InstName R1 SYMATTR Value 50k SYMBOL res 2496 288 R0 SYMATTR InstName R2 SYMATTR Value 53k SYMBOL cap 2496 432 R0 SYMATTR InstName C1 SYMATTR Value 10µ SYMBOL diode 2592 304 R0 SYMATTR InstName D1 SYMATTR Value 1N914 SYMBOL cap 2416 464 R0 SYMATTR InstName C2 SYMATTR Value 10n SYMBOL res 1952 432 R0 SYMATTR InstName R3 SYMATTR Value 10k TEXT 2048 696 Left 0 !.tran 0 5 .1 1m uic