The integrated circuits used in this project are uncommon today. It is worth the idea for a microcontrolled project or with equivalents. We found this configuration in an old documentation.
This low frequency oscillator with an operational amplifier of type 741 has adjustment of the mark...
The circuit shown in the figure is suggested by National Semiconductor and makes use of an...
This circuit was obtained in a technical documentation from 1997. In the event of a power failure, it...