Music box circuit using a CD4017 decade counter and two 555 timers.

This circuit attempts to emulate the operation of a music box. The maximum number of notes is 10, allowing us to make a simple melody.

Electronic Music Metronome circuit using a 555 timer

This Electronic Music Metronome circuit, allows those persons who study or are music fans, to keep the timing, quite accurately.

Guitar Synthesizer using CD4046

To achieve the objective, the CMOS PLL CD4046 integrated circuit is used, producing an unusual sound from a guitar whish sounds very similar to a synthesizer.