Hmmm, can't seem to get it working .... WSAK8118 Stereo Ultrasonic Sound and Bat Detector

Hello all,

So I just finished putting together this kit, one of the mics broke while doing so and I am waiting for a replacement, but I finished up the rest and thought I would turn it on and listen to one side… mono isn’t all bad :slight_smile: Unfortunately nothing happens. The LED doesn’t turn on and I don’t hear anything… is there a troubleshooting section of the website? I followed the directions meticulously and my soldiers are fairly neat, I don’t see anywhere that could be shorting out. I’m a hobbyist and was just doing this for some fun and didn’t think it would be this difficult. Any help or point in the right direction would be greatly appreciated.


Hello @jdr3 ,

  • Check the batteries and polarity: 3x 1,5V AA batteries are needed (place new ones).
  • Check also the orientation of the IC’s (IC1 - IC4), Check the position of the notch!.
  • Check the polarity of the LED.
  • Check also the Soldering joints:


Best Regards,
Velleman Support

1 Like

Everything looks good. My soldering isn’t perfect, but it doesn’t look like anything should be shorting…

@jdr3 ,

It is difficult to check from a distance, what exactly is wrong without being able to inspect the product.
You can always return it to the store for RMA procedure.

Best regards,
Velleman Support