Ammeter (CB9660E)

This current meter with many scales was found in a 80s American documentation. The operational amplifier is from that time, uncommon nowadays.

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1W Amplifier (CB6293E)
The PA222 integrated circuit used in this project from an American 1967 documentation is not...
Infrared Alarm (CB16907E)
This circuit with an optical path sensor was found in a 1995 documentation. The circuit fires...
50 ohm line booster (CB6221E)
This circuit was found in an 80's Electronic Design. It amplifies TTL fast signals for a coaxial...