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Metronome Circuit

Metronome Circuit

The circuit was designed to provide a prototype of a metronome circuit utilizing the functions of CA741 operational amplifiers.The operation is of circuit can be considered as astable where it continuously oscillates to different states.
Metronome – a device or apparatus used to indicate or establish the exact speed or tempo of music; physically, it resembles the function of a clock but using an inverted pendulum that regularly ticks or beats at an adjustable rate or intervals due to the position of the sliding weight on the pendulum

Op-Amp – a differential amplifier having a large voltage gain, very high input impedance and low output impedance

CA741 – a high gain operational amplifier, functioning as single or dual at 0.9 MHz frequency, used for commercial, industrial, and military applications

This circuit uses a couple of Op-amps to produce an interesting sound effect. The left hand CA741 is wired as a standard astable and produces the timing pulses, controlled by C1, R2 and VR1. The output is fed via C2 to the second op-amp and is also direct coupled via the zener ZD1 to Q1. The right hand CA741 is configured as an integrator, its purpose being to distort the output pulse from the first op-amp. This produces a ringing effect on the output pulse and gives the circuit a characteristic “tick” sound.

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