Version 4 SHEET 1 3120 3716 WIRE 2480 2176 1568 2176 WIRE 1696 2208 1456 2208 WIRE 2432 2208 1696 2208 WIRE 1456 2272 1456 2208 WIRE 1568 2272 1568 2176 WIRE 1696 2272 1696 2208 WIRE 2656 2272 2192 2272 WIRE 2736 2272 2656 2272 WIRE 2736 2288 2736 2272 WIRE 2192 2320 2192 2272 WIRE 2032 2384 1952 2384 WIRE 2432 2384 2432 2208 WIRE 2432 2384 2384 2384 WIRE 2736 2384 2736 2368 WIRE 1456 2416 1456 2352 WIRE 1904 2416 1456 2416 WIRE 2032 2416 1904 2416 WIRE 2480 2448 2480 2176 WIRE 2480 2448 2384 2448 WIRE 1568 2480 1568 2352 WIRE 2032 2480 1568 2480 WIRE 1568 2496 1568 2480 WIRE 2032 2512 2000 2512 WIRE 2656 2544 2656 2272 WIRE 1696 2576 1696 2352 WIRE 1952 2576 1952 2384 WIRE 1952 2576 1696 2576 WIRE 2032 2576 1952 2576 WIRE 2496 2576 2384 2576 WIRE 1568 2592 1568 2576 WIRE 1696 2592 1696 2576 WIRE 736 2608 736 2576 WIRE 1904 2608 1904 2416 WIRE 2032 2608 1904 2608 WIRE 2432 2640 2384 2640 WIRE 2496 2640 2432 2640 WIRE 2032 2672 1872 2672 WIRE 1696 2704 1696 2672 WIRE 2032 2704 1696 2704 WIRE 2656 2704 2656 2624 WIRE 2656 2704 2384 2704 WIRE 736 2720 736 2688 WIRE 2656 2720 2656 2704 WIRE 1696 2752 1696 2704 WIRE 1872 2752 1872 2672 WIRE 1984 2752 1872 2752 WIRE 1872 2784 1872 2752 WIRE 2656 2800 2656 2784 WIRE 864 2832 864 2816 WIRE 2096 2848 2096 2800 WIRE 2192 2848 2192 2800 WIRE 2288 2848 2288 2800 WIRE 736 2896 736 2832 WIRE 864 2928 864 2912 WIRE 1696 2928 1696 2832 WIRE 1872 2928 1872 2864 WIRE 1984 2944 1984 2752 WIRE 2176 2944 1984 2944 WIRE 2432 2944 2432 2640 WIRE 2432 2944 2256 2944 WIRE 1456 2976 1456 2416 WIRE 736 3040 736 2976 WIRE 1456 3088 1456 3056 FLAG 2736 2384 0 FLAG 2192 2848 0 FLAG 2288 2848 0 FLAG 2656 2800 0 FLAG 2096 2848 0 FLAG 2496 2576 HEAT FLAG 2496 2640 COOL FLAG 736 2720 0 FLAG 736 2576 Temp FLAG 864 2928 0 FLAG 864 2816 alpha FLAG 736 3040 0 FLAG 736 2832 beta FLAG 1872 2928 0 FLAG 1696 2928 0 FLAG 2000 2512 0 FLAG 1568 2592 0 FLAG 1456 3088 0 SYMBOL LTC1040 2208 2560 R0 SYMATTR InstName U1 SYMBOL VOLTAGE 2736 2272 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName V3 SYMATTR Value PWL(0 0 1u 5) SYMBOL res 2640 2528 R0 SYMATTR InstName R2 SYMATTR Value 10Meg SYMBOL cap 2640 2720 R0 SYMATTR InstName C1 SYMATTR Value .1µ SYMBOL voltage 736 2592 R0 WINDOW 123 0 0 Left 2 WINDOW 39 0 0 Left 2 SYMATTR InstName VTemp SYMATTR Value PWL(0 26 200 28 400 26) SYMBOL bv 864 2816 R0 SYMATTR InstName B1 SYMATTR Value V=1m*(A-1/(V(Temp)+273.15))/C SYMBOL bv 736 2880 R0 SYMATTR InstName B2 SYMATTR Value V=1m*sqrt((B/(3*C))**3+(1K*V(alpha))**2/4) SYMBOL res 1440 2960 R0 SYMATTR InstName RThermistor SYMATTR Value R=exp((1K*V(beta)-.5K*V(alpha))**.3333 -(1K*V(beta)+.5K*V(alpha))**.3333) SYMBOL res 2272 2928 R90 WINDOW 0 0 56 VBottom 2 WINDOW 3 32 56 VTop 2 SYMATTR InstName R3 SYMATTR Value 20Meg SYMBOL res 1856 2768 R0 SYMATTR InstName R4 SYMATTR Value 82K SYMBOL res 1680 2736 R0 SYMATTR InstName R5 SYMATTR Value 78 SYMBOL res 1680 2576 R0 SYMATTR InstName RADJ2 SYMATTR Value {6.81K+5K*(1-TADJ)} SYMBOL res 1680 2256 R0 SYMATTR InstName RADJ1 SYMATTR Value {4.99K+5K*TADJ} SYMBOL res 1552 2256 R0 SYMATTR InstName R8 SYMATTR Value 20Meg SYMBOL res 1552 2480 R0 SYMATTR InstName R9 SYMATTR Value 82K SYMBOL res 1440 2256 R0 SYMATTR InstName R10 SYMATTR Value 4.32K TEXT 2616 2984 Left 2 !.tran 400 TEXT 1088 2592 Left 2 !.param A=1.285e-3\n.param B=2.362e-4\n.param C=9.285e-8 TEXT 2312 2120 Left 2 !.param TADJ=.662 TEXT 2320 2080 Left 2 ;Set point adjust TEXT 1680 2128 Left 2 ;Complete Heating/Cooling Automatic Thermostat TEXT 744 2464 Left 2 ;Thermistor Calculations RECTANGLE Normal 1376 3088 600 2440 2