This article describes a metronome and a diapason (electronic tuning fork) combined into a single unit. The circuit design philosophy was to keep the hardware as simple as possible, and to provide features comparable to those of high-end commercial units. This has been achieved by using a microcontroller chip PIC16F84.The PIC16C84 was programmed to take care of all functions, including the generation of beat ticks in metronome mode, the digital synthesis of pure tones (sinewaves) for the full range of notes (from C2 to B7) in diapason mode, and the driving of the LCD display module.In metronome mode, the circuit produce beat ticks whose sound is short and sharp, imitating that of a mechanical metronome. A useful feature is emphasising the first beat in each bar. This is done acoustically, by changing the pitch of the beat, and visually, by the lighting of a LED. An interesting feature is that the unit can provide irregular rhythms of 5/4th, 7/4th and 8/4th, as well as no rhythm — only regular beats imitating a mechanical metronome.