This type of oscillator uses an unusual configuration and can be used as a time base, metronome or rhythm player. Metronomes or rhythms are devices that produce luminous or audible signals at regular intervals to set the pace of a gymnastic exercise, repetitive physical activity or even the performance of a song on any instrument. The circuit we propose can be used for the suggested purposes and many others, such as for example in signaling. The rhythm of the music performed by an apprentice is not always constant, which requires the use of devices called metronomes. The simplest type is the pendulum which, in addition to noise (tic-tac), has the balance to serve as a basis for the musician not to leave the rhythm. This same type of metronome can be found in experimental physics laboratories for carrying out experiments that involve constant time intervals. The circuit that we propose produces only sound, and with good volume, serving for music students, for the physics laboratory and also for gymnastics. In this device we have a different relaxation oscillator, based on a neon lamp and a SCR, which produce pulses (crackles) of good intensity on a speaker. The frequency range ranges from a fraction of hertz to a few hertz. The device is powered directly by the 110V or 220V power grid and has an excellent performance, taking into account the small number of components used.
The reader has the following usage possibilities for this device:
• Music accompaniment
• Setting rhythm for gymnastic or dance exercises
• Time limitation by counting pulses
• Physics experiments
Characteristics:
• Supply voltage: 110/220 VAC
• Consumption: 1 W (approx.)
• Pulse power: 4W (peak)
• Frequency range: 0.05 to 10 Hz
