WSMB124 two buttons do not react

Kits Microcontroller Programmer - Experimenting Project
1

Hi there, we’ve built the WSMB124 kit.
When starting up, a light is moving from right to left in the last row. When clicking the ‘set’ button, a text is appearing (’> i love mini kits<’). But the other two buttons do not react. Whatever i click, the text does not stop, and i cannot change anything. The signal of the ‘standby’ and ‘run’ button is measured, and looks good (pin 9 and 10 on the chip).
anybody an idea what to do ?

2

Hello @brickfan ,

Can you upload high resolution pictures of solder side (bottom PCB) of WSMB124.

Best regards,
Velleman Support

3

Hi @VEL450

Thanks for your response. Here’s a link to the picture.

4

Hello @brickfan ,

Soldering side seems to be good.
May wrong polarisation of Diode D2 / D4.
if possible con you upload the component side in high res. as well.

This is the circuit diagram. May this will help to find the problem:

image
image1074×705 57 KB

Best Regards,
Velleman Support

5

Hi @VEL450

Thanks for your fast reply. Here’s a picture of the front side of the pcb.

7

Hi @VEL450

The issue is solved. After measuring i figured out that there was a strip on the pcb broken (happened when assembling the pcb). After fixing that, it works.

8

Hello @brickfan,

Nice to hear you’ve found the problem. well done :+1:

Broken PCB traces was not seen on pictuers.

We wish you lots of fun with the “Rolling Message Display”.

Best Regards,
Velleman Support