Metronome Circuit

Posted on Feb 5, 2014

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 pur

Metronome Circuit
Click here to download the full size of the above Circuit.

pose 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. A sound sample recorded under Audacity on PCLinuxOS is shown below. The emphasized ringing can be seen in the enlarged view above. The output pulse at the first op-amp will cause the zener and Q1 to conduct on every positive transition. The 1k resistor R8 then acts as a low impedance shunt at the input of the integrator and produces a characteristic "tock" effect. R8, R7, R9, C3 and C4 may all be adjusted to tailor the sound effect.

Leave Comment

characters left:

Related Circuits

  • New Circuits



    Popular Circuits

    0-12V 2A power supply
    "Automatic" Light Bulb Changer
    Acoustic Sound Receiver
    flyback inverter for fluorescent lamp 15
    22 watt car subwoofer amplifier
    MC33374 high power voltage switching regulator
    Soundtraxx Sierra Tips
    PCM2706 USB DAC with I2S
    Updated Circuit Details for Clara Rockmores Theremin
    USB 8bit Interface Board