Driver for oscillograph (T459E)

This circuit from an old MIT documentation excites an oscillograph element, an old waveform viewer.

Triangular Generator (CB12291E)
This circuit from a 1979 publication uses FETs which can be BF245 and integrated circuits, unlike...
Amplifier for microammeter (CB3927E)
This sensitive amplifier for low current measurement uses a differential amplifier configuration with...
Color Bar Generator (CB25390E)
This analog TV circuit generates bars in the NTSC standard. We found it in the July 1991 issue of...