Abstract: A data inserting device for a camera arranged to automatically insert data in response to an insertion trigger signal from the camera body includes abnormity detecting means which supplies current to a specific part where such abnormity that hinders the data inserting action tends to occur and is arranged to detect the abnormity by an impedance change occurred at the part, and external display means for displaying the abnormity upon detection thereof by the detecting means.

Abstract: The disclosed camera sequentially controls the operations of two or more units, for example, an exposure control circuit and a film advance motor. An arrangement senses whether or not an operation has been completed normally and stores the result. When the succeeding operation is to start, the condition of the storage is sensed. If the memory indicates that the operation has not been normal, then the following operation is disabled.

Abstract: A motor drive circuit for a camera which circuit is adapted to control a motor which is incorporated in a camera body, a film winder, a lens cylinder body or the like. The function of such a motor is to carry out film winding and rewinding, shutter charging and actuation of a taking lens for focusing or other photographic operations. The motor drive circuit is provided with a battery for supplying electric power to the motor and is arranged to control a motor driving current which is supplied to the motor and a control current which is not supplied to the motor but is used to control the motor driving current, so as to raise the efficiency of the use of the battery, i.e., to bring about longevity of the battery.