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Sound-to-light unit

Velleman MK103: Sound to Light Minikit

Velleman MK103

DIY Sound to Light Soldering Minikit

You can use the Velleman MK103 Sound to Light minikit for different and fun applications because the four LEDs light up simultaneously to every sound within its range. You could use it as a door bell or telephone indicator or just watch it flash to the sound of music. The MK103 Velleman minikit is easy to build with all through hole soldering and an on board microphone. There’s a potentiometer to adjust the sensitivity and it operates from a 9V battery. The battery holder is included and mounts on the PCB.


  • Assemble a device that lights up when sound is detected
  • Includes on-board microphone, potentiometer and battery holder


Consumption 0.5 mA min. / 12 mA max.
Power Supply 9 V Battery - Not Included
Dimensions 1.6 in. x 2.2 in. x 1.4 in.

Additional Information

Difficulty Level 2


Assembly manual
Illustrated (rev.1)

Info Sheets

Overview of Velleman modules that are equal to D.I.Y Kits
This sheet is useful when you want to know which modules you could find in the do-it-yourself range of Velleman Kits and minikits.

 Warning: this product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov/product