Three-way power source circuit

摘要: A three-way power source circuit for portable electronic equipment, such as a radio, is disclosed. The comprises solar energy cell, rechargeable battery and standard nonrechargeable dry cell. transistor couples the cell to common point of circuit, second point. provides one output lines equipment. return are coupled further which serves line supplied Switches provided eliminating flow current allows recharge when sufficient light present. When insufficient present, or battery, if it sufficiently charged, provide If depleted, then cell/or primary