Battery discharge condition indicating circuit for electrical small sized device e.g. electrical razor, has inductive load, transistor and indictor, and electric motor utilized as impedance

摘要

The circuit has an inductive load e.g. electric motor (M), transistor (T) and an indictor e.g. light emitting diode. An electric motor of an electrical small sized device is utilized as an impedance. A battery (B), load and the switch are connected in a row, and the battery, load and the indicator are connected in the row, and the switch is opened, when the voltage of the battery is smaller than a threshold. The transistor is closed, when the voltage of the battery is larger than another threshold.