Battery-free calculator powered by solar energy

Abstract

We provide a battery-free calculator that uses solar energy for power, eliminating the need for disposable batteries, reducing the cost of using a calculator for users, and minimizing the environmental burden caused by battery disposal. [Solution] The solar-powered battery-free calculator comprises a charging module 100, a stabilization module 6, and a calculator body module 9. The charging module is connected to the calculator body module via the stabilization module. The charging module includes a solar panel 1 having a solar cell output positive electrode and a solar cell output negative electrode, a reverse current prevention unit 2 having a reverse current prevention positive electrode and a reverse current prevention negative electrode, and a farad capacitor 5. The output positive electrode of the solar cell is connected to the positive electrode of the reverse current prevention unit, and the farad capacitor is connected in parallel to both ends of the solar panel and the reverse current prevention unit. The negative electrode and power supply negative electrode of the reverse current prevention unit are configured as the power supply positive electrode and power supply negative electrode of the charging module, respectively, and the power supply positive electrode is connected to the calculator body module via the stabilization module. This calculator is powered by the farad capacitor and solar panel and has a function to automatically switch the power supply mode.

Images