Norman Lathrop Enterprises  
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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.

CHILD MONITOR
x   BABY MONITOR
x   MONITOR (CHILD)
xx   EAVESDROPPING DEVICE
xx   INTERCOM

Baby monitor consists of a carrier-current transmitter and receiver which transmits over AC electrical wires. Multiple receivers can work with one transmitter.
ELECTRONICS HOBBYISTS HANDBOOK 1993 pg. 57

Circuit for an alarm which is triggered by the sound of a baby crying.
POPULAR ELECTRONICS [1] Jun 1976 (v.9#6) pg. 30

Electronic circuit will sound an audible alarm and flash a light when it detects the crying of a baby. Useful for a deaf parent.
POPULAR ELECTRONICS [1] Oct 1981 (v.19#10) pg. 98

Build a baby monitor. This project consists of a carrier-current transmitter and a receiver.
POPULAR ELECTRONICS [2] Oct 1992 (v.9#10) pg. 31

Build a wireless video camera monitoring system for a child's room which uses infrared to see in the dark. The signal can be received up to 150-ft. by any TV or fed directly to a video-in port. Est. cost: $200.
POPULAR HOME AUTOMATION Jul 1999 (v.4#3) pg. 60