Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION.
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Farenheit foiler. A temperature-sensing relay can control fans, etc. to keep electronic equipment cool. The probe is constructed from a solderless mounting ring and a diode. Accuracy is within 0.5-degrees Celsius over the range -50 to +150.
AUDIO AMATEUR 2/1980 [Mar 1980] (v.11#2) pg. 35

Four-speed automatic fan control for an audio amplifier. Controls the fan speed in proportion to heat sink temperature.
AUDIO AMATEUR 4/1984 [Sep 1984] (v.15#4) pg. 24

Freeze fighter. Combine an electronic thermometer (temperature controller) with a powerline-carrier remote control universal interface. Use it to control an air conditioner, outdoor heat tapes, etc.
ELECTRONICS HOBBYISTS HANDBOOK Spring 1994 pg. 68

Circuit to increase the speed of a 12-volt DC fan motor as a sensing thermistor gets warmer.
ELECTRONICS NOW Feb 1997 (v.68#2) pg. 13

Precision temperature controller uses a unique method of "phase control" rather than "on-off" switching to hold temperatures within 0.5 degrees F. The controller's range is 68-250 degrees F.
POPULAR ELECTRONICS [2] May 1990 (v.7#5) pg. 38
Added Info POPULAR ELECTRONICS [2] Sep 1990 (v.7#9) pg. 3

Temperature-controlled circuits include (1) ceiling fan actuator, (2) freeze sensor to activate a water pipe heater, and (3) differential thermostat circuit.
POPULAR ELECTRONICS [2] Jan 1995 (v.12#1) pg. 28
Added Info POPULAR ELECTRONICS [2] Jun 1995 (v.12#6) pg. 29

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