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.
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Battery-powered rain detector sounds a buzzer whenever the sensor gets wet.
ELECTRONICS EXPERIMENTERS HANDBOOK Summer 1995 pg. 94

Waterbugg alarm. Battery-powered water detector alarm is contained in an ordinary sandwich-size plastic container and is designed for set-and-forget operation. Batteries last two years. Sounds an alarm for hours when wetness is detected. Est. cost: $8.
ELECTRONICS HOBBYISTS HANDBOOK 1989 pg. 77

Moisture detector circuit uses 2 transistors and a piezoelectric transducer to sound an alarm when water is present. Est. cost: $6 (kit).
ELECTRONICS HOBBYISTS HANDBOOK 1991 pg. 12

Wide-coverage water detector sensor lets you monitor for the presence of water over a wide area instead of just one spot.
MODERN ELECTRONICS [2] Jun 1990 (v.7#6) pg. 32
Correction MODERN ELECTRONICS [2] Aug 1990 (v.7#8) pg. 82

Water leak alarm. Simple circuit powered by a 9-volt battery. Can be fitted with multiple detectors.
POPULAR ELECTRONICS [2] Jan 1990 (v.7#1) pg. 43

Moisture detector circuit incorporates a transistor as a simple switch.
POPULAR ELECTRONICS [2] May 1991 (v.8#5) pg. 76

Simple water detector circuit sounds a buzzer.
POPULAR ELECTRONICS [2] Sep 1991 (v.8#9) pg. 22

Simple alarm circuit detects high water in a sump pit.
POPULAR ELECTRONICS [2] Sep 1992 (v.9#9) pg. 75

Build a water-level alarm circuit.
POPULAR ELECTRONICS [2] Apr 1993 (v.10#4) pg. 53
Added Info POPULAR ELECTRONICS [2] Aug 1993 (v.10#8) pg. 3

Battery-powered rain (moisture) detector sounds an alarm.
POPULAR ELECTRONICS [2] Feb 1995 (v.12#2) pg. 71

Circuit will set off an audible alarm if water is detected between two steel rods.
POPULAR ELECTRONICS [2] Mar 1998 (v.15#3) pg. 28

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