Version 4
SHEET 1 880 680
WIRE 304 96 80 96
WIRE 80 144 80 96
WIRE 80 256 80 224
FLAG 80 256 0
FLAG 304 96 OUT
SYMBOL bv 80 128 R0
SYMATTR InstName B1
SYMATTR Value V=floor(sqrt(4e3*time+12.25)+0.5) - floor(sqrt(4e3*time+8.25)+0.5)
TEXT 208 152 Left 2 !.tran 55m