Driver for oscillograph (T459E)

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

SCR control by LDR (CB7217E)
This circuit can be used to activate the lamp when it gets dark. We found the circuit in old...
Product detector (CB9684E)
Found in Motorola documentation from the 1980s, this circuit employs an integrated device from...
Step Generator 555 (CB11407E)
This circuit generates slow interval steps for controlling stepper motors. The circuit has two...