12-bit DA converter (CB9331E)

We found this circuit in documentation from Analog Devices from the 90s. The components are from that time, uncommon today.

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Remote Control Extender (CB26151E)
This circuit appeared in the 1991 Electronics Experimenter Handbook. The circuit is for remote...
Power control (CB23586E)
This circuit was found in Radio Electronics magazine from January 1959. The power transistor must...
Atmospheric noise monitor (CB21066E)
This circuit uses an MW radio tuned to around 540 kHz to detect atmospheric signals, for example, from...