In use telephone indicator (CB8665E)

This circuit was found in a 90s Electronics Now. The circuit can use a TIC106 for the SCR.

Cascading the LM3914 (CB24656E)
In the figure we have a circuit in which two moving bar/dot indicators are connected together to...
Half Wave Quadruplicator (CB20197E)
In the figure we have the configuration of a half wave voltage quadruplicator. In this case,...
Operational Power Booster (CB14097E)
The configuration shown can be applied to modern operational amplifierso with common power...