A previously-published Design Idea outlined a polarity protection circuit that provides the correct connection of the battery to a load regardless of the battery’s orientation in its holder. The ...

This polarity protection circuit is dimensioned for 12 V power supplies and avoids the voltage and power loss problem. By correct polarity, the current flowing to the D1 and the relay coil causes the ...

BUDGE ING, Maxim Integrated Products Inc., Sunnyvale, Calif. [email protected] Because digital systems often have only a single-polarity power supply, a common problem becomes ...