Who sketched ideas for solar power and a calculator?

The ideas for solar power and the calculator can be traced back to several inventors, but one prominent figure is Charles Fritts, who created the first working solar cell in the 1880s. For calculators, the development of early mechanical calculators in the 17th century can be attributed to inventors like Blaise Pascal and Gottfried Wilhelm Leibniz. Both fields evolved significantly over the years, with many contributors refining and advancing the initial concepts.