Three-input majority gate (CB7248E)

This interesting logic circuit was found in a manual of neon lamp applications.

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Decoder with the 4017 (CB4529E)
This circuit was obtained from an English magazine from 1979, but it can be easily assembled today...
Unijunction Oscillator (CB928E)
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Nicad Charger (CB4788E)
This sophisticated NiCad battery charger was found in a 1990s Elektor. The components used are...