. . .
. . .
--- Oops...
Put the transistor in backwards to try it out and forgot to put it back.
Here it is right way up:
Version 4 SHEET 1 880 680 WIRE 144 16 -16 16 WIRE 368 16 144 16 WIRE 512 16 368 16 WIRE 512 64 512 16 WIRE 368 80 368 16 WIRE 144 144 144 16 WIRE -16 160 -16 16 WIRE 256 192 208 192 WIRE 368 192 368 144 WIRE 416 192 368 192 WIRE 512 192 512 144 WIRE 544 192 512 192 WIRE 512 240 512 192 WIRE 368 256 368 192 WIRE -16 368 -16 240 WIRE 144 368 144 240 WIRE 144 368 -16 368 WIRE 368 368 368 320 WIRE 368 368 144 368 WIRE 512 368 512 320 WIRE 512 368 368 368 WIRE -16 448 -16 368 FLAG -16 448 0 SYMBOL npn 208 240 R180 SYMATTR InstName Q1 SYMATTR Value 2N2222 SYMBOL voltage -16 144 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 WINDOW 3 24 96 Invisible 2 SYMATTR Value PULSE(0 25 0 1) SYMATTR InstName V1 SYMBOL diode 352 256 R0 WINDOW 0 -43 32 Left 2 WINDOW 3 -69 64 Left 2 SYMATTR InstName D1 SYMATTR Value 1N4148 SYMBOL diode 384 144 R180 WINDOW 0 49 31 Left 2 WINDOW 3 24 0 Left 2 SYMATTR InstName D2 SYMATTR Value 1N4148 SYMBOL res 496 48 R0 SYMATTR InstName R1 SYMATTR Value 248G SYMBOL res 496 224 R0 SYMATTR InstName R3 SYMATTR Value 2.2G TEXT -8 392 Left 2 !;tran 1 startup uic TEXT -8 424 Left 2 !.dc V1 .01 25 .001
-- JF