: Most projects can be constructed for roughly $30 or less .
: Laser spy devices and remote control hijackers. 101 Spy Gadgets for the Evil Genius
is a DIY project book by Brad Graham and Kathy McGowan , published by McGraw-Hill TAB . It provides step-by-step instructions for building functional espionage tools—such as night vision viewers, hidden cameras, and phone voice changers—using inexpensive, easily obtainable electronic components. Core Features & Content : Most projects can be constructed for roughly $30 or less
: Aimed at hobbyists and "evil geniuses" ranging from beginners to intermediate electronics enthusiasts. and phone voice changers—using inexpensive
: Infrared light converters, LED illuminators, and night vision viewers.
: Phone number decoders, "spammer jammers," and voice changers.