Thermometer for 5V operation with (CB8711E)

Found in a 90s 303 Circuits, this circuit uses the KTY10 sensor, widely used at the time.

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Optical relay activator (CB8395E)
Found in a 80s American documentation, this circuit pulses a lamp for optical relay tests. The...
Speed and direction control for shunt motors (CB5418E)
This circuit for shunt motors was found in an American 1980s documentation. The SCR should be rated...
Pulse Divider (CB6604E)
This circuit was obtained from documentation from 1968. The transistors used as well as the tunnel...