Solar flashlight (CB20488E)

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

Debouncer (CB4811E)
This is one of the many anti-deboucer circuits the reader can find on this site. The base is TTL...
Adjustable Current Regulator (CB1583E )
The circuit of the figure is a current regulator with adjustment in the range of 0 to 3 amps. The...
Synthesizer Amplifier (CB1491S)
This circuit is intended for signal amplification of electronic musical instruments. We found in a...