This circuit was obtained in a 90s documentation. However, it can be developed with modern operational amplifiers. The power supply must be symmetrical.
This voltage-controlled oscillator or VCO was found in a Radio Electronics magazine from July...
This circuit has a duty cycle of 50%. We found it in old English documentation. The center...
This control allows to start or stop a motor up to 3 or 4 A with a low intensity signal. The...