Version 4 SHEET 1 2512 1864 WIRE 1616 1248 1536 1248 WIRE 1664 1248 1616 1248 WIRE 1760 1248 1744 1248 WIRE 1536 1264 1536 1248 WIRE 1760 1296 1760 1248 WIRE 1536 1360 1536 1344 WIRE 1616 1360 1616 1248 WIRE 1632 1360 1616 1360 WIRE 1920 1360 1888 1360 WIRE 2016 1360 1920 1360 WIRE 1920 1376 1920 1360 WIRE 2016 1392 2016 1360 WIRE 1632 1472 1552 1472 WIRE 1920 1472 1920 1456 WIRE 1920 1472 1888 1472 WIRE 1920 1488 1920 1472 WIRE 2016 1488 2016 1456 WIRE 1552 1520 1552 1472 WIRE 1760 1552 1760 1536 WIRE 1920 1568 1920 1552 WIRE 1552 1632 1552 1600 FLAG 1760 1552 0 FLAG 1536 1360 0 FLAG 1920 1568 0 FLAG 2016 1488 0 FLAG 1552 1632 0 FLAG 1536 1248 IN SYMBOL ind 1648 1264 R270 WINDOW 0 32 56 VTop 2 WINDOW 3 5 56 VBottom 2 SYMATTR InstName L1 SYMATTR Value 10µ SYMATTR SpiceLine Rpar=2K SYMBOL VOLTAGE 1536 1248 R0 SYMATTR InstName V1 SYMATTR Value 5 SYMBOL cap 1904 1488 R0 SYMATTR InstName C1 SYMATTR Value 1µ SYMBOL PowerProducts\\LT3491 1760 1408 R0 SYMATTR InstName U1 SYMBOL res 1904 1472 M180 WINDOW 0 36 76 Left 2 WINDOW 3 36 40 Left 2 SYMATTR InstName R1 SYMATTR Value 10 SYMBOL LED 2000 1392 R0 WINDOW 123 24 85 Left 2 SYMATTR InstName D1 SYMATTR Value NSPW500BS SYMATTR Description Diode SYMATTR Type diode SYMATTR Value2 N=4 SYMBOL voltage 1552 1504 R0 WINDOW 123 32 56 VTop 2 WINDOW 39 32 56 VTop 2 SYMATTR InstName V2 SYMATTR Value PULSE(.5 1.25 .1m .1m .1m .5m 1.2m) TEXT 2040 1624 Left 2 !.tran 1.5m startup