9 V to 5 V converter LT1175 (CB14616E)

We found this circuit in the 1997 Linear Technology Applications. The components used were common at the time.

Logarithmic Amplifier with Operational (CB13772E)
The circuit presented was found in a Motorola documentation from 19761, but it can be assembled with a...
Photometer (CB25092E)
This simple bargraph photometer appeared in the November 1987 issue of Radio Electronics magazine. The...
Darlington 10 Hz Passband Stage (CB6278E)
This circuit, found in a 1964 US documentation, consists of a selective amplifier that lets only...