Search -
Build Your Own Digital Door Alarm (Hands-on High Tech Series)
Build Your Own Digital Door Alarm - Hands-on High Tech Series Author:Conn McQuinn Enter the world of high tech security and learn the secrets behind closed circuit video, infrared and hidden cameras, and biometric systems. Build a personal door alarm and program it with a secret code. This fascinating kit includes a 32-page book with full-color illustrations, easy-to-follow directions, and all the components needed to build a... more » personal alarm.« less