This simple audio generator with the 741 was found in a 90sTexas Instruments. The circuit generates sinusoidal signals from 15 Hz to 150 kHz in 4 bands, as shown in the diagram.
This circuit was found in a 1967 Electronics World. We can design it with a BF245 for the FET and a...
This circuit is built around a component that is not very common today. It consists of a precision...
Four amplifiers are used in this circuit, which uses a magnetic pickup to obtain the pulses whose...