Version 4 SHEET 1 1764 840 WIRE -368 -64 -608 -64 WIRE 144 -64 -368 -64 WIRE 160 -64 144 -64 WIRE 288 -64 160 -64 WIRE 160 -48 160 -64 WIRE -608 -32 -608 -64 WIRE -368 -32 -368 -64 WIRE 544 16 400 16 WIRE 288 32 288 -64 WIRE -608 80 -608 48 WIRE -544 80 -608 80 WIRE -496 80 -544 80 WIRE -288 80 -496 80 WIRE -128 80 -208 80 WIRE 160 80 160 32 WIRE 224 80 160 80 WIRE 0 96 -64 96 WIRE 16 96 0 96 WIRE 48 96 16 96 WIRE 160 96 160 80 WIRE 160 96 128 96 WIRE 560 96 496 96 WIRE -608 112 -608 80 WIRE -128 112 -160 112 WIRE 400 128 400 16 WIRE 432 128 400 128 WIRE 560 144 496 144 WIRE 768 144 560 144 WIRE 832 144 768 144 WIRE 832 160 832 144 WIRE -368 192 -368 48 WIRE -320 192 -368 192 WIRE -288 192 -320 192 WIRE -160 192 -160 112 WIRE -160 192 -208 192 WIRE -128 192 -160 192 WIRE 0 192 0 96 WIRE 0 192 -48 192 WIRE 288 192 288 128 WIRE 336 192 288 192 WIRE 432 192 336 192 WIRE -496 224 -496 80 WIRE 336 224 336 192 WIRE 432 224 400 224 WIRE -608 240 -608 192 WIRE 640 288 576 288 WIRE 736 288 736 256 WIRE 736 288 640 288 WIRE -368 304 -368 192 WIRE 736 320 736 288 WIRE 576 336 576 288 WIRE 640 336 640 288 WIRE -608 432 -608 320 WIRE -496 432 -496 288 WIRE -496 432 -608 432 WIRE -368 432 -368 384 WIRE -368 432 -496 432 WIRE 336 432 336 288 WIRE 336 432 -368 432 WIRE 400 432 400 224 WIRE 400 432 336 432 WIRE 576 432 576 400 WIRE 576 432 400 432 WIRE 640 432 640 400 WIRE 640 432 576 432 WIRE 736 432 736 400 WIRE 736 432 640 432 WIRE 832 432 832 240 WIRE 832 432 736 432 WIRE 336 448 336 432 WIRE 736 448 736 432 FLAG -96 128 0 FLAG -96 64 +V FLAG 144 -64 +V IOPIN 144 -64 In FLAG 336 448 0 FLAG 336 192 Vrel FLAG 16 96 Vo FLAG -544 80 Vset FLAG 736 448 0 FLAG 736 256 +v FLAG 560 96 RLA_n/c FLAG 560 144 RLA_n/o FLAG 544 16 +v FLAG 768 144 Htr FLAG -320 192 THntc SYMBOL res -32 176 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R8 SYMATTR Value 1meg SYMBOL pnp 224 128 M180 SYMATTR InstName Q1 SYMATTR Value 2N3906 SYMBOL res 144 80 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R4 SYMATTR Value 2k2 SYMBOL res -384 -48 R0 SYMATTR InstName R2 SYMATTR Value 22k SYMBOL res -624 -48 R0 SYMATTR InstName R6 SYMATTR Value 22k SYMBOL res -624 96 R0 SYMATTR InstName R9 SYMATTR Value 13k5 SYMBOL res -624 224 R0 SYMATTR InstName R10 SYMATTR Value 1k SYMBOL res -192 176 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 30 13 VTop 0 SYMATTR InstName R3 SYMATTR Value 10k SYMBOL res -192 64 R90 WINDOW 0 0 56 VBottom 0 WINDOW 3 32 56 VTop 0 SYMATTR InstName R7 SYMATTR Value 10k SYMBOL cap -512 224 R0 SYMATTR InstName C1 SYMATTR Value 1µ SYMBOL XOPAMP -96 32 R0 WINDOW 38 -47 223 Left 0 SYMATTR SpiceModel LM393A SYMATTR InstName U1 SYMBOL Misc\\battery 736 304 R0 SYMATTR InstName V1 SYMATTR Value 12v SYMBOL cap 624 336 R0 SYMATTR InstName C2 SYMATTR Value 22µ SYMBOL cap 560 336 R0 SYMATTR InstName C3 SYMATTR Value 100n SYMBOL rly_spdt 464 144 R0 SYMATTR SpiceModel RLY_POW1 SYMATTR InstName U2 SYMATTR Value RCOIL=250 TON=5m VNOM=12 SYMBOL diode 352 288 R180 WINDOW 0 24 72 Left 0 WINDOW 3 24 0 Left 0 SYMATTR InstName D1 SYMATTR Value 1N4006 SYMBOL res 144 -64 R0 SYMATTR InstName R1 SYMATTR Value 22k SYMBOL res 816 144 R0 SYMATTR InstName R5 SYMATTR Value 100 SYMBOL ntc_resistor -384 288 R0 WINDOW 123 52 120 Left 0 SYMATTR Value2 RTH=667 TAU=15 SYMATTR InstName R11 SYMATTR SpiceModel NTC_BTH SYMATTR Value R0=10K B=3988 TEXT -576 456 Left 0 !.tran 0 .5 0 1m TEXT -616 -184 Left 0 !.INCLUDE LM393A.5_1_ti.mod TEXT 408 328 Left 0 ;Power Relay TEXT -616 -216 Left 0 !.include relay.lib TEXT 424 304 Left 0 ;12V_250R TEXT -712 152 Left 0 ;20Kpot TEXT -704 280 Left 0 ;2Kpot TEXT 736 168 Left 0 ;Heater TEXT 752 192 Left 0 ;Sim TEXT -328 456 Left 0 ;NTC 10k, B=3988 with self heating TEXT -256 -136 Left 0 ;.STEP TEMP LIST 1 5 10 TEXT -240 -104 Left 0 ;.STEP TEMP 0 50 10 TEXT 904 -152 Left 0 !.OPTIONS TNOM={T0} TEXT 920 -104 Left 0 !.PARAM R0=10000\n*.PARAM B=3988\n.PARAM TK=273.15\n.PARAM T0=25 TEXT 920 32 Left 0 !.SUBCKT NTC_BTH 1 2 R0={R0} B={B} RTH={RTH} TAU={TAU} \n* R0 resistance at 25degree\n* B material constant\n* Rth thermal resistance in degree/Watt\n* TAU time constant \n*.PARAM R0=10000\n*.PARAM B=3988\n.PARAM TK=273.15\n.PARAM T0=25\n* Resistor model\nRP 1 2 1G\nB1 1 2 I=V(1,2)/{R0*exp(B*(1/(V(3)+TEMP+TK)-1/(T0+TK)))}\n* Thermal model\n*V(3) is dT = Tntc-TEMP\nRTH 3 0 {RTH}\nCTH 3 0 {TAU/RTH}\nBTH 0 3 I=V(1,2)*V(1,2)/{R0*exp(B*(1/(V(3)+TEMP+TK)-1/(T0+TK)))}\n.ENDS TEXT -224 -168 Left 0 !.options TEMP=25 TEXT -616 -152 Left 0 !.include ntc_BTH.sub