Version 4
SHEET 1 1140 680
WIRE -16 -880 -176 -880
WIRE 368 -880 -16 -880
WIRE 608 -880 368 -880
WIRE 784 -880 608 -880
WIRE -176 -864 -176 -880
WIRE -848 -816 -976 -816
WIRE -736 -816 -768 -816
WIRE -496 -816 -672 -816
WIRE -464 -816 -496 -816
WIRE -320 -816 -400 -816
WIRE -240 -816 -320 -816
WIRE 784 -800 784 -880
WIRE -320 -736 -320 -816
WIRE -16 -736 -16 -880
WIRE 368 -720 368 -880
WIRE -496 -688 -496 -816
WIRE -176 -640 -176 -768
WIRE -16 -640 -16 -672
WIRE -16 -640 -176 -640
WIRE 176 -640 -16 -640
WIRE 608 -576 608 -880
WIRE 368 -560 368 -640
WIRE 560 -560 368 -560
WIRE -496 -496 -496 -624
WIRE -320 -496 -320 -656
WIRE 656 -480 608 -480
WIRE 960 -480 656 -480
WIRE 1136 -480 960 -480
WIRE -16 -464 -16 -640
WIRE 176 -432 176 -640
WIRE 656 -432 656 -480
WIRE 368 -368 368 -560
WIRE 656 -320 656 -352
WIRE 656 -320 432 -320
WIRE 960 -320 960 -480
WIRE -16 -240 -16 -384
WIRE 368 -176 368 -272
WIRE 176 -112 176 -352
WIRE 656 -112 656 -320
WIRE 656 -112 176 -112
WIRE 960 -112 960 -240
FLAG -976 -736 0
FLAG 784 -720 0
FLAG 368 -176 0
FLAG -16 -240 0
FLAG 960 -112 0
FLAG -320 -496 0
FLAG -496 -496 0
SYMBOL voltage -976 -832 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V2
SYMATTR Value PULSE(3V 0 0.2s 0 0 0.0002 0.0005 10)
SYMBOL cap -32 -736 R0
SYMATTR InstName C2
SYMATTR Value 10µF
SYMBOL voltage 784 -816 R0
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName V3
SYMATTR Value 3.3V
SYMBOL npn 432 -368 M0
SYMATTR InstName Q2
SYMATTR Value 2N3904
SYMBOL res 352 -736 R0
SYMATTR InstName R4
SYMATTR Value 220K
SYMBOL res 640 -448 R0
SYMATTR InstName R3
SYMATTR Value 2MEG
SYMBOL res 160 -448 R0
SYMATTR InstName R1
SYMATTR Value 100K
SYMBOL res -32 -480 R0
SYMATTR InstName R2
SYMATTR Value 100K
SYMBOL pmos 560 -480 M180
SYMATTR InstName M1
SYMATTR Value AO3401
SYMATTR Prefix X
SYMBOL res 944 -336 R0
SYMATTR InstName R7
SYMATTR Value 10
SYMBOL cap -672 -832 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C1
SYMATTR Value 0.1µF
SYMBOL res -336 -752 R0
SYMATTR InstName R5
SYMATTR Value 2MEG
SYMBOL res -752 -832 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R8
SYMATTR Value 1K
SYMBOL npn -240 -864 R0
SYMATTR InstName Q1
SYMATTR Value 2N3904
SYMBOL schottky -480 -624 R180
WINDOW 0 24 64 Left 2
WINDOW 3 24 0 Left 2
SYMATTR InstName D1
SYMATTR Value BAT54
SYMATTR Description Diode
SYMATTR Type diode
SYMBOL schottky -464 -832 M90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName D2
SYMATTR Value BAT54
SYMATTR Description Diode
SYMATTR Type diode
TEXT -760 -896 Left 2 ;Serial data
TEXT 32 -1016 Left 2 !.tran 10
TEXT -32 -1120 Left 2 !.include ../models/AO3401.mod
TEXT 80 -800 Left 2 ;David Pilling 2015
TEXT 744 -528 Left 2 ;ESP8266 power
TEXT 608 -912 Left 2 ;VC99 battery positive