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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Touch Dimmer (CB18757E)
This interesting touch dimmer was obtained in a 1993 publication, basically consisting of a...
Single supply thermometer (CB9361E)
This circuit was found in an Electronic Design from the 90s. The circuit uses a type J...
8W Amplifier (CB23635E)
This amplifier was published in Radio Electronics magazine in September 1959. The 8-transistor circuit...