Using a 709 integrated circuit this circuit was found in the June 1972 issue of Radio Electronics magazine. More modern operational equivalents can be used. The power supply is symmetrical.
We found this circuit in a 2005 documentation. The circuit allows the automation of a gate through...
Found in an 90s Electronic Design, this circuit provides a 110 dB output to a ceramic transducer....
This circuit activates a relay with a frequency signal determined by the adjustment components. The...