Tube voltmeter (CB22309E)

This circuit is indicated to be used with valve voltmeters, expanding its scale. The circuit is from documentation from the 60s.

Astable NAND CMOS III (CB19540E)
This circuit is asymmetric with the mark-space relationship determined by R1 and R2. The diode can be a...
Basic Trigger (CB21462E)
This basic Schmitt trigger was found in an American publication from 1968. The circuit uses...
Sequential without integrated (CB6768E)
This circuit is from a 1967 publication and applies to incandescent lamps up to 600 W. Triacs must be...