Detailed entries for one subject from the INDEX TO HOW TO DO IT INFORMATION.
Click on a see also (sa) or tracing (xx) to view detailed entries about a related subject.
The entries are in alphabetical order by magazine name and then in chronological sequence.
To obtain a copy of any magazine article contact your local public library or the publisher.

Circuits for sensors in computer-controlled alarm systems.
BYTE Feb 1981 (v.6#2) pg. 280

Adjustable threshold temperature alarm and light-detection alarm circuits.
COMPUTERS & ELECTRONICS Apr 1983 (v.21#4) pg. 109

Meltdown alarm. Audio alarm will sound if ice begins to melt.
CQ. THE RADIO AMATEUR'S JOURNAL Mar 1979 (v.35#3) pg. 106

Freeze-up guard gives visible evidence to a neighbor should the temperature in your house drop below 50 degrees.
ELECTRONICS ILLUSTRATED Mar 1969 (v.12#2) pg. 67

Freezer Sentry. Build a food freezer monitor which will sound an alarm if the temperature inside the freezer rises, or there is a loss of AC power.
ELECTRONICS NOW Feb 1997 (v.68#2) pg. 55
Added Info ELECTRONICS NOW May 1997 (v.68#5) pg. 10

Simple circuit attached to a telephone line will cause a busy signal if the temperature falls below preset temperature.
FINE HOMEBUILDING #39 Apr-May 1987 pg. 14

Assemble a frost indicator alarm for use in your car. Turns on an LED whenever the temperature outside your car reaches 37-degrees F. or less, the temperature at which road ice begins to form. Est. cost: $24.
HANDS-ON ELECTRONICS Jun 1988 (v.5#6) pg. 35

Aquisense. An inexpensive freezer monitor with an unusual thaw/freeze sensor. Battery-operated unit sounds an alarm in advance of the temperature rising enough to cause any damage.
HANDS-ON ELECTRONICS Jul 1988 (v.5#7) pg. 59

Meltdown alarm. A circuit for an alarm that will sound off if freezer ice begins to melt. Est. cost: $11.
MODERN ELECTRONICS [1] Jun 1978 (v.1#4) pg. 55

Teleguard. Part 3. Solid-state sensing modules. Low-cost circuits you build to enhance the operation of the Teleguard security system. Includes light-activated sensors, temperature-sensing module, and fluid-detecting module.
MODERN ELECTRONICS [2] Aug 1985 (v.2#2) pg. 56

Visual regulator monitor. Separate circuits with LEDs alert you to loss of regulation, overcurrent and thermal problems caused by regulator ICs in power supplies.
MODERN ELECTRONICS [2] Oct 1988 (v.5#10) pg. 52

Build this battery powered freezer alarm. Sounds an audible alarm if the temperature gets too high. Est. cost: $20.
MOTHER EARTH NEWS #76 Jul-Aug 1982 pg. 84

Infrared sensor can serve as fire alarm, burglar alarm, detect a cloudy sky, act as a remote control, etc. Responds to objects at least 75-degrees Celsius hotter than ambient temperature of the detector.
POPULAR ELECTRONICS [1] Jan 1969 (v.30#1) pg. 27

Home freezer thaw alarm will sound when temperature rises above a safe, preset value. Est. cost: $10.
POPULAR ELECTRONICS [1] May 1974 (v.5#5) pg. 81

Freezer over-temperature alarm warns you if temperature in your freezer gets above a preset safe level. Operates even if power fails.
POPULAR ELECTRONICS [1] Apr 1981 (v.19#4) pg. 75

Circuit which maintains your refrigerator's temperature to within four degrees of a preset value. Audible and visual alarms indicate temperature status.
POPULAR ELECTRONICS [2] Mar 1998 (v.15#3) pg. 57

Low temperature alarm warns when the furnace quits, before the house gets cold. Est. cost: $5.
POPULAR MECHANICS Feb 1965 (v.123#2) pg. 198

Separate thermostat acts as a trigger to turn on a signal light or alarm of the temperature should drop below a preset temperature. Est. cost: $15.
POPULAR MECHANICS Nov 1966 (v.126#5) pg. 159

Freeze alarm to save your car and pipes.
POPULAR SCIENCE Feb 1964 (v.184#2) pg. 96

Alarm rings if temperature inside a food freezer exceeds a preset limit or if electrical power fails.
POPULAR SCIENCE Mar 1972 (v.200#3) pg. 112

Electronic heat sniffer. Heat-sensing circuit lights an LED or sounds a buzzer when a rise in temperature is sensed. The ambient temperature (starting point) is adjustable.
RADIO-ELECTRONICS May 1985 (v.56#5) pg. 110

New temperature-alarm IC (3030) from Intech Inc. is explained. Includes tips on application circuits.
RADIO-ELECTRONICS Apr 1986 (v.57#4) pg. 106

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