5 V reference LT1027 (CB14595E)

This circuit is from the 1993 Linear Technology Applications Databook. The component is uncommon today.

Sound Level Indicator (CB10649E)
This circuit is from a 1987 American publication called Electronics Handbook. The circuit can be...
12V LM350 Battery Charger (CB15650E)
The indicated circuit performs a slow charge of 12 V batteries maintaining a constant current of...
Megaphon (CB789E)
This ultra-simple circuit need a carbon microphone to operate. The circuit must be powered from D...