Low battery indicator 555 (CB9551E)

This circuit can operate with different voltages, depending on the zener used. We found it in a 90s American documentation.

AD Converter Circuit Test (CB16683E)
This circuit was found in Intersil's 1992 documentation consisting of a test for ADc0801 and...
Lamp control (CB21962E)
This 60's shield or driver employs germanium transistors. The circuit is from a 1960 Gernsback...
Transparent Octal Latch (CB15750E)
The circuit shown in the figure on the right can be used on a data transfer bus with the use of an...