Solar flashlight (CB20488E)

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

Circuit for Observing Hysteresis (CB13953E)
We found this circuit in an old oscilloscope publication. With it, it is possible to observe the B...
Fast adder 1 (CB7055E)
We found this circuit in an Electronic Engineering from the 90s. It applies to any logical family....
13.6 V x 1A Power Supply (CB13633E)
This circuit is from a documentation for 1976 radio amateurs. We can implement this circuit with...