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

Hello Guys

i maked a Tutorial Video for this Product :slight_smile: …maybe i can translate it from German into other languages…
Watch my Video :slight_smile: and plz let a Comment or Abo…

WHADDA - WSAK8118 - Ultraschall- und Fledermausdetektor (Ultrasonic) - Stereo - Bausatz TUTORIAL - YouTube

This Tutorial-Video costs much of time and i`ve made it with Love :tada: :slight_smile:

(if Whadda or Velleman is searching for other Tutorial Videos…for your other Products, i can make it! contact me :slight_smile:

well, i think a nice Videotutorial of a nice product, is very important for potential buyer´s and the purchase decision

Mine did not work because of the black cable in the batterypack prevented the + from the battery to connect. Put some solder on the connection and it works. Perhaps you have the same problem.

Only problem I have is that the LEFT sound channel is a lot lower on volume than the RIGHT. Does someone know how to solve this?

I have a “dead” sound generator. It was suggested to send a project back to the store for trouble shooting.
I would do that just to know what I did wrong. Where to send?
These are suppose to be learning kits. Thanks