Solar flashlight (CB20488E)

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

18 W Oscillator with 4001 (CB24353E)
This alarm oscillator was found in the December 1974 issue of Radio Electronics magazine. The...
CB26109E Amplifier (CB26109E)
We found this small audio amplifier in the November 1999 issue of Electronics Now magazine. The...
Overload protection (CB24883E)
This circuit is a continuation of the previous one, serving as a protector against overloads in...