Version 4
SHEET 1 1500 1404
WIRE -384 224 -416 224
WIRE -224 224 -304 224
WIRE -192 224 -224 224
WIRE -128 224 -192 224
WIRE 48 224 -48 224
WIRE 96 224 48 224
WIRE 240 224 176 224
WIRE 528 224 240 224
WIRE 544 224 528 224
WIRE 640 224 624 224
WIRE 704 224 640 224
WIRE 48 240 48 224
WIRE 240 240 240 224
WIRE -192 256 -192 224
WIRE 48 320 48 304
WIRE 240 320 240 304
WIRE 528 320 528 224
WIRE 544 320 528 320
WIRE 640 320 640 224
WIRE 640 320 624 320
WIRE 160 336 160 288
WIRE -192 352 -192 336
WIRE -192 352 -256 352
WIRE -192 384 -192 352
WIRE 112 384 112 288
WIRE 336 400 160 400
WIRE 176 448 160 448
WIRE 528 448 528 400
WIRE -192 480 -192 448
WIRE 176 480 176 448
WIRE 112 512 112 464
WIRE 528 560 528 528
WIRE 336 848 336 400
WIRE 720 848 336 848
WIRE 1008 848 720 848
WIRE 400 928 160 928
WIRE 160 960 160 928
WIRE 400 992 400 928
WIRE 160 1072 160 1040
WIRE 160 1088 160 1072
WIRE 400 1120 400 1072
WIRE 896 1120 400 1120
WIRE 1008 1136 1008 848
WIRE 1008 1136 960 1136
WIRE 896 1152 768 1152
WIRE 400 1184 400 1120
WIRE 768 1200 768 1152
WIRE 368 1216 320 1216
WIRE 400 1296 400 1248
WIRE 768 1312 768 1280
FLAG 528 560 0
FLAG 528 400 Tamb
FLAG 704 224 Tamb
FLAG -416 224 Tamb
FLAG 160 336 0
FLAG 112 512 0
FLAG -224 224 Tfridge
FLAG -256 352 Tbeer
FLAG -192 480 0
FLAG 400 1296 0
FLAG 160 1072 0
FLAG 320 1216 Tfridge
FLAG 400 928 Vbias
FLAG 768 1312 0
FLAG 928 1104 V+
FLAG 928 1168 V-
FLAG -48 1024 0
FLAG 48 1024 0
FLAG -48 944 V+
FLAG 48 944 V-
FLAG 176 480 0
FLAG 240 320 0
FLAG 48 320 0
FLAG 720 848 Control
SYMBOL Peltier_c_VmaxImaxDtTh 144 224 R0
WINDOW 0 -4 -84 Center 0
WINDOW 39 -40 -125 Center 0
SYMATTR InstName TEC_1
SYMATTR SpiceLine Vmax=24.6 Imax=11.3 DTmax=69 Th=300
SYMBOL voltage 528 432 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName Vamb
SYMATTR Value SINE({273.15+25} 1 {1/600})
SYMBOL res 528 208 M90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName Rsink1
SYMATTR Value .3
SYMBOL res -288 208 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName Risol
SYMATTR Value 100
SYMBOL cap -208 384 R0
WINDOW 123 38 33 Left 0
SYMATTR Value2 ic={273.15+25}
SYMATTR InstName Cbeer
SYMATTR Value 30
SYMBOL res -32 208 R90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName Rcooler
SYMATTR Value 1
SYMBOL res -208 240 R0
SYMATTR InstName Rbeer
SYMATTR Value 5
SYMBOL thermistor 400 1216 R0
WINDOW 0 -23 -58 Right 0
WINDOW 39 -31 44 Right 0
SYMATTR InstName Rntc
SYMATTR SpiceLine Beta=3976 T0={273.15+25} R0=50k Tau=11 Delta=2.5m
SYMBOL voltage 160 944 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V1
SYMATTR Value 5
SYMBOL res 384 976 R0
SYMATTR InstName R1
SYMATTR Value 50k
SYMBOL voltage 768 1184 R0
SYMATTR InstName V2
SYMATTR Value 3.4
SYMBOL voltage -48 928 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V3
SYMATTR Value 12
SYMBOL voltage 48 928 R0
WINDOW 123 0 0 Left 0
WINDOW 39 0 0 Left 0
SYMATTR InstName V4
SYMATTR Value -5
SYMBOL g 112 368 M0
SYMATTR InstName G1
SYMATTR Value 1
SYMBOL res 528 304 M90
WINDOW 0 0 56 VBottom 0
WINDOW 3 32 56 VTop 0
SYMATTR InstName Rsink2
SYMATTR Value .3
SYMBOL cap 224 240 R0
WINDOW 123 47 35 Left 0
SYMATTR Value2 ic={273.15+25}
SYMATTR InstName C1
SYMATTR Value 5
SYMATTR SpiceLine Rser=10m
SYMBOL cap 32 240 R0
WINDOW 123 -142 67 Left 0
SYMATTR Value2 ic={273.15+25}
SYMATTR InstName C2
SYMATTR Value 5
SYMATTR SpiceLine Rser=10m
SYMBOL Robertugo\\OPAMP5 928 1072 R0
SYMATTR InstName U2
SYMATTR SpiceModel level3a
TEXT 984 1280 Left 0 !.tran 0 3k 1 uic
TEXT 344 -144 Left 0 ;Rsink is therma resistance of heat sink (between TEC hot side and ambient)
TEXT -56 -144 Right 0 ;Risol is thermal isolation resistance of fridge [deg C / W]
TEXT -56 -104 Right 0 ;Rcooler is thermal resistance between TEC cold side and fridge's internal ambient
TEXT -56 -64 Right 0 ;Rbeer is thermal resistance between fridge's internal ambient and beer can
TEXT 344 -80 Left 0 ;Parameters of TEC can be found from datasheet.\nE.g. http://www.kryotherm.ru/hieff_ss_tems.html\nDrift-0,8: Imax=11.3 Vmax=24.3 DTmax=69 Th=300\nTh is not always listed on datasheet. Typical value is 300.\nKryotherm also supplies a desing SW from which Th can be\nretrieved.
TEXT 656 480 Left 0 ;Ambient temperatur is 25 degrees C
TEXT -56 -16 Right 0 ;Cbeer is thermal capacity of beer can
TEXT -672 648 Left 0 ;Plot the value of Tbeer to see how fast you can freeze a beer can ;-)\n \nAll thermal resistances and capcitances are arbitrary, only TEC parameters are real.
TEXT 120 1360 Left 0 ;http://www.betatherm.com/datasheets/datasheet.php?p_id=155&pc_id=2&pc_id_dual=2a\nLA50KF3976F 50,000 ohm ± 1% 3976 ± 1% 2.5mW/ °C Typ. 11 Seconds