Abstract
An automatic power generator unit for a digital tape measure was developed as a part of development of a small-size, maintenance-free automatic power generating system with low environmental load. In the 1^<st> report, feasibility of the system was verified by making the macro-model. The objective of this report is; 1) the examination of the miniaturization of an automatic electrical generating system, 2) making the 2^<nd> trial unit based on the optimum design and 3) the evaluation of the performance of the 2^<nd> trial unit. As a result of the optimum design the 2^<nd> trial unit was improved to the twice of electric power efficiency, and 1.35% of size from the 1^<st> trial unit.
