| 摘要 |
<p>PURPOSE:To eliminate a mis-calculation due to the lowering of luminance, by charging the excessive energy of a solar battery in a power source auxiliary capacitor, and feeding to a calculator arithmetic part from the power source auxiliary capacitor when the electromotive force of the solar battery is lowered. CONSTITUTION:Under a condition where the luminance is high, and the electromotive force of a solar battery 1 is enough, a power source control part 3 goes to the first operating state, and the energy of an excessive electromotive force is charged to a large capacity of capacitor 2 through a transistor Q1, performing a feed from the solar battery 1 to a calculator arithmetic part 4 through a diode D1. It is controlled automatically so that a charging state to the large capacity of capacitor 2 is weakened corresponding to the lowering of the electromotive force of the solar battery 1 due to the lowering of the luminance, however, a power supplying is continued to the calculator arithmetic part 4. In a dark environment such that the luminance is not enough to offer a strong electromotive force to the solar battery, the power source control part 3 goes to the second operating state, and the calculator arithmetic part 4 receives the power supplying from the energy charged in the large capacity of capacitor 2, thereby being made possible to operate.</p> |
