This section contains intruder alarms for your home, car and motorcycle, power failure and water level alarms and even a snore detector. All circuits are listed alphabetically on the Circuit Index page and in date order on the update page. All contributors are listed on the credits page. If you have problems try my help page first. Most circuits
on this site use SI Notation. Due to large volumes of email, I regret that I can only answer questions about circuits on my site.