Used with infrared remotes at the time, this circuit was found in a 1991 RE Experimenter Handbook. It may not work with the faster remotes control used today.
This circuit was found in a 1970 IEEE publication. The circuit functions as a voltage controlled...
Many reed switches can be wired in series to perform na efficient alarm as shoen in the figure....
This Maxim Voltage Supervisory integrated circuit can be obtained from Mouser Electronics. It has...