Medical thermometer (CB7880E)

This circuit of an old medical publication makes use of an integrated circuit of the time, uncommon in our times. The sensors are diodes.

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Battery monitor (CB9545E)
This circuit with zener diodes was found in documentation from the 90s. The zener diodes determine the...
Signal Tracer (CB11335E)
This signal follower was found in Popular Electronics from July 1992. We can easily assemble it...
EVAL-CN0397-ARDZ Evaluation Board for the CN0397 an Intelligent Detection System for Visible Light Recognition and Detection - Analog Devices
The EVAL-CN0397-ARDZ evaluation board from Analog Devices is compatible with Arduino shields to...