Version 4
SHEET 1 880 680
WIRE 288 -32 160 -32
WIRE 160 16 160 -32
WIRE 160 112 160 96
WIRE 288 128 288 -32
WIRE 288 128 240 128
WIRE 288 160 288 128
WIRE 240 176 240 128
WIRE 256 176 240 176
WIRE 400 192 320 192
WIRE 464 192 400 192
WIRE -48 208 -160 208
WIRE 48 208 32 208
WIRE 96 208 48 208
WIRE 224 208 176 208
WIRE 256 208 224 208
WIRE -160 256 -160 208
WIRE 48 256 48 208
WIRE 288 256 288 224
WIRE 288 256 272 256
WIRE 224 272 224 208
WIRE 304 272 224 272
WIRE 400 272 400 192
WIRE 400 272 384 272
WIRE 272 288 272 256
WIRE 288 288 272 288
WIRE 288 320 288 288
WIRE -160 400 -160 336
WIRE 48 400 48 336
WIRE 48 400 -160 400
WIRE -160 432 -160 400
FLAG 288 320 0
FLAG -160 432 0
FLAG 160 112 0
FLAG 464 192 Warnsig
SYMBOL res 192 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 1k
SYMBOL voltage 160 0 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V0+
SYMATTR Value 3.3
SYMBOL voltage -160 240 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
WINDOW 3 -259 112 Left 2
SYMATTR InstName V_Akku
SYMATTR Value PULSE(2.5 4.2 0 100m 100m 100m)
SYMBOL res 48 192 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 390
SYMBOL res 64 352 R180
WINDOW 0 36 76 Left 2
WINDOW 3 36 40 Left 2
SYMATTR InstName R4
SYMATTR Value 10k
SYMBOL res 400 256 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 56k
SYMBOL Opamps\\UniversalOpamp2 288 192 R0
SYMATTR InstName U1
TEXT 120 344 Left 2 !.tran 300m
TEXT 112 384 Left 2 ;nicht invertierender Schmitt Trigger