The purpose of this circuit is to check the linearity of SSB amplifiers. The circuit was found in an old documentation for hams. The diode is a general purpose detector type.
In this circuit the photo-transistor signal is amplified by a Darlington step and then applied to a...
This circuit mimics the sound of a siren when we turn the axis of the small DC motor. The...
This variation of configuration that is common on our site was found in a 1980s documentation. LEDs can...