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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.


Vehicle detection systems. A look at the sensing technologies and installation considerations for signaling the arrival of a vehicle in your driveway.
ELECTRONIC HOUSE Apr 1996 (v.11#2) pg. 54

Using an X-10 module and Powerflash Interface to turn on a lamp when triggered by an open door/gate latch, telephone ringer, sump pump malfunction, or some other device.
ELECTRONIC HOUSE Feb 1997 (v.12#1) pg. 70

TV "call box" allows TV sound to be interrupted and used as a loudspeaker for calling people watching TV.
ELECTRONICS ILLUSTRATED Jul 1965 (v.8#4) pg. 90

Simple messages printed on lenses of lamp sockets can be illuminated remotely to signal reply to a caller at your door or office. Messages like "I am busy", "You may enter", "I am not in" can be easily conveyed by this device.
ELEMENTARY ELECTRONICS Mar-Apr 1973 (v.13#2) pg. 69

Novel door annunciator circuit provides an attention-getting "Whoop" sound that is not easy to ignore.
HANDS-ON ELECTRONICS Aug 1987 (v.4#8) pg. 94
Added Info POPULAR ELECTRONICS [2] Oct 1991 (v.8#10) pg. 25

Light-sensitive alarm circuit (annunciator) sounds an audio alert whenever someone enters a door.
HANDS-ON ELECTRONICS Nov 1987 (v.4#11) pg. 95

Simple "burglar alarm" circuit consists of a mat switch that will ring a bell when stepped on.
HANDS-ON ELECTRONICS Jan 1989 (v.6#1) pg. 24

Cockpit idiot lights (annunciator lights). Part 1. Low voltage and high voltage lights.
KITPLANES Jan 1999 (v.16#1) pg. 48

Cockpit idiot lights (annunciator lights). Part 2. Pressure and temperature sensor circuits.
KITPLANES Feb 1999 (v.16#2) pg. 86

Cockpit idiot lights (annunciator lights). Part 3. Circuit to monitor multiple warning lamps and summarize the status using a single green, yellow, or red LED.
KITPLANES Mar 1999 (v.16#3) pg. 81

Build a low-cost voice annunciator circuit which monitors existing annunciator lights (idiot lights) and issues an audio message whenever they turn on.
KITPLANES Jun 1999 (v.16#6) pg. 84

Old-house intercoms. Part 1. Buzzers, beepers, buttons, bells and speaking tubes. Includes diagram of wiring for old annunciators, a box with a bell and lights that indicate the room where the button was pressed.
OLD-HOUSE JOURNAL Oct 1979 (v.7#10) pg. 112

Old-house intercoms. Part 2. How to pinpoint problems in old electric bell systems and annunciators.
OLD-HOUSE JOURNAL Nov 1979 (v.7#11) pg. 128

The in-out annunciator can detect which way the object was moving which broke the beam of light. Est. cost: $20.
POPULAR ELECTRONICS [1] Apr 1971 (v.34#4) pg. 48

More circuits using the 555 IC timer include (1) tone generator, (2) code practice oscillator, (3) CW monitor and (4) electric-eye annunciator.
POPULAR ELECTRONICS [1] Jul 1974 (v.6#1) pg. 50

Door monitor circuit signals if an outer door has been opened and continues to signal until a reset button is pressed.
POPULAR ELECTRONICS [2] May 1990 (v.7#5) pg. 28

Expandable two-door annunciator circuit provides two distinctively different tones.
POPULAR ELECTRONICS [2] Jan 1991 (v.8#1) pg. 81

Sentry Strobe alert system. A flashing strobe light is used to call attention to a ringing phone, intruder detector, temperature conditions, etc.
POPULAR ELECTRONICS [2] Feb 1991 (v.8#2) pg. 33
Correction POPULAR ELECTRONICS [2] Jun 1991 (v.8#6) pg. 3

Adding a loud horn to an intercom system. This modified annunciator is ideal for a noisy environment.
POPULAR ELECTRONICS [2] Jul 1991 (v.8#7) pg. 21

Door Minder. After a built-in 24-second delay to allow for normal opening and closing, this electronic chime will sound once-per-second until a door is closed.
POPULAR ELECTRONICS [2] Nov 1993 (v.10#11) pg. 53

Door annunciator circuit sounds a buzzer whenever a door is opened.
POPULAR ELECTRONICS [2] Sep 1994 (v.11#9) pg. 25

Solid-state circuit to replace an electromechanical buzzer.
POPULAR ELECTRONICS [2] Mar 1998 (v.15#3) pg. 56

Patio alert. A wireless receiver which can be activated by three transmitters which in turn can be activated by anything that makes a noise (doorbell, telephone, baby crying, etc...). House wiring carries signal. Receiver buzzes and turns on a light indicating source of noise.
POPULAR SCIENCE Apr 1972 (v.200#4) pg. 115

Little pro beep. Easy to build programmable beeper can be used as the heart of a call system. Can be set to beep once, twice or four times, repeating the signal automatically.
RADIO-ELECTRONICS Jul 1978 (v.49#7) pg. 60

Tips on using a thirty-tune melody microprocessor in a doorbell system, music box, annunciator, etc.
RADIO-ELECTRONICS Jan 1984 (v.55#1) pg. 97

Entryway monitor. An electronic "watchdog" circuit or annunciator can operate either in audible or silent mode to tell you if anyone has entered your home.
RADIO-ELECTRONICS Mar 1985 (v.56#3) pg. 105

"Parasitic signaller" makes the doorbell circuit do double-duty as both an annunciator and as a communications system. A surge in the doorbell wiring will cause this buzzer to sound in the basement.
RADIO-ELECTRONICS Feb 1988 (v.59#2) pg. 98

A unique message-leaving device. A "nixie" tube which will display any digit from 0 to 9 is inserted into the center of an artificial flower that is included in a bouquet of artificial flowers on a secretary's desk. A control knob turns on any one of the digits and signals the secretary or leaves a message for her when you are gone.
RADIO-TV EXPERIMENTER Aug-Sep 1968 (v.25#1) pg. 79