MK115 pocket sound level meter

Kits Mini Kits Range
1

Hi,
I’ve just finished the MK115 level meter and when I’ve inserted the battery all the led turned on even without any sound in the room.
The leds are still on even with the less sensivity.

How can I fix this ?

Thank you very much
Antoine

2

Have u checked ur soldering & component polarity?

3

Everything’s fine. Solders and polarity are ok.

4

Try adjusting RV1. If that doesn’t work you’ll have to wait for someone else to give advice.

5

Adjusting RV1 doesn’t work. I’ll wait for some other advices.

Thank you

6

Make sure to use a fresh battery. Make sure GND of microphone is properly connected.