Found in American documentation from 1968, this circuit has an acute cut-off of the frequency to which it is tuned and which depends on RC. Transistors may be modern equivalents of general use.
This circuit with zener diodes was found in documentation from the 90s. The zener diodes determine the...
This signal follower was found in Popular Electronics from July 1992. We can easily assemble it...
The EVAL-CN0397-ARDZ evaluation board from Analog Devices is compatible with Arduino shields to...