Solar flashlight (CB20488E)

This circuit charges a battery to power a flashlight at night. The circuit is from an English publication from 1991.

Mouser and Grant Imahara Showcase Contract Manufacturing in “Engineering Big Ideas” Video Finale
January 8, 2020 – Mouser Electronics, Inc. and celebrity engineer Grant Imahara today released the...
Timer Very Simple (MSB059)
A capacitor stores electrical charges. This component is formed by two metal parts called...
Touch switch (CB8724E)
This biestable touch circuit with the 4093 was found in a Popular Electronics from the 90s. The...