In 2024, we introduced a variable-frequency audio notch filter. Now we present a high-performance audio frequency generator with adjustable output control.

Here we present a simple, useful and low-cost signal generator built around NE555 timers. Using external switches, you can control or select frequency ranges as per your requirements.

Fig. 1: Author’s prototype for Arduino based frequency generator Circuit diagram of the sine, square and ramp Arduino-based frequency generator is shown in Fig. 2.

The doubly fed induction generator (DFG) is a variable-speed constant-frequency generator operating in either subsynchronous or supersynchronous mode. The transient behavior of a symmetrically loaded ...

This paper presents the modeling, control, and implementation of a novel variable-speed constant-frequency power generation system for renewable and distributed energy applications. The generation ...

The Model 2001A function generator features a continuously variable frequency range from 2 Hz to 200 kHz in six decade ranges. A second fixed TTL-level output is also provided ...