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.

Alarm circuit uses a 555 timer and a glass-encapsulated mercury switch to form a "tilt switch".
HANDS-ON ELECTRONICS Jul 1987 (v.4#7) pg. 93

Super-sensitive tilt switch for automotive alarms.
MODERN ELECTRONICS [2] Feb 1991 (v.8#2) pg. 48

Simple circuit serves as a tamper switch to indicate if something has been opened, lifted, etc.
POPULAR ELECTRONICS [2] May 1989 (v.6#5) pg. 24

Mercury-switch alarm. Make a simple, but effective, theft alarm (motion detector) with a mercury switch and a few support components. Est. cost: $10.
POPULAR ELECTRONICS [2] Sep 1989 (v.6#9) pg. 72

Instrument alarm circuit utilizes a tilt switch and a buzzer to detect unauthorized movement of expensive electronic test equipment.
POPULAR ELECTRONICS [2] Feb 1990 (v.7#2) pg. 28

Earthquake detector circuit is really a simple transistor switch (circuit) which incorporates a mercury-switch.
POPULAR ELECTRONICS [2] Apr 1990 (v.7#4) pg. 24

More electronic sensors. (1) Vibration detector. (2) Magnetic-field detector. (3) Tilt sensor. (4) Wind-direction sensor. (5) Reed-switch replacement.
POPULAR ELECTRONICS [2] Feb 1997 (v.14#2) pg. 73

Mercury switch made from a small plastic pill vial.
POPULAR MECHANICS Oct 1966 (v.126#4) pg. 187

Switch to detect a "tilt" from the vertical.
RADIO-ELECTRONICS Jan 1984 (v.55#1) pg. 93

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