This circuit generates sinusoidal signals from 15 Hz to 15 kHz. The circuit is from Electronics Now magazine from December 1995. The power supply must be dual.
This crystal configuration can be made with triggers of any logic. The frequency is given by the...
Only two transistors are used in this preamp for low-sensitive transducers, such as guitar and...
This project from a 1983 publication can be assembled using more modern transistors. We can use...