NeoTrellis 4x4 seems non-functional

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loccoyoco
 
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NeoTrellis 4x4 seems non-functional

Post by loccoyoco »

I purchased 8 Neotrellis 4x4 boards and I have one that does not seem to work work. I've been debugging it, and I believe is defective.

I've tried the following, using a Teensy 4.1 to drive the board:
1 )In-matrix (connected to other NeoTrellis boards) testing. This board does not work. The other 7 boards do.
2 ) Single-board testing with this particular NeoTrellis, not connected to any other NeoTrellis boards. It does not work, using the default address settings (meaning that no A* jumpers are bridged)
3) Multiple different addresses selected via the A* jumpers. Regardless of what address I change the board to, I cannot get any of the LEDs to light when I run the Neotrellis test program.
4 ) Inspection of the board shows now bridged solder joints
5) Reflowing the address joints made no difference, nor did reflowing the SDA, SCL, GND, VIN and INT joints when the board was connected to other boards.
In summary, I've tried the board when connected to other boards, as well as in isolation. I've rung out the connections to verify continuity, and can find nothing that is wrong.

My PO is 2905913-5431395173, and this was purchased on 8/20.

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dastels
 
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Re: NeoTrellis 4x4 seems non-functional

Post by dastels »

Did you test it independently before doing any soldering to it?

Dave

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loccoyoco
 
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Re: NeoTrellis 4x4 seems non-functional

Post by loccoyoco »

Hi Dave. No I didn't test it independently before doing any soldering.

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dastels
 
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Re: NeoTrellis 4x4 seems non-functional

Post by dastels »

That's always a good idea. That way you know conclusively whether it is a bad product or due to damage during soldering. That said, let's get you a replacement. Please email [email protected] with a link to this thread, your order number, and request the replacement of one NeoTrellis RGB Driver PCB for 4x4 Keypad.

Dave

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loccoyoco
 
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Re: NeoTrellis 4x4 seems non-functional

Post by loccoyoco »

Thanks, Dave. I agree, and I should have tested the individual boards first. I will be sure to test the new board individually before soldering it into the assembly.

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loccoyoco
 
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Re: NeoTrellis 4x4 seems non-functional

Post by loccoyoco »

I received my replacement board over the weekend. I confirmed that it works on it's own, and my grid of boards is also now fully functional. Thank you!

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dastels
 
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Re: NeoTrellis 4x4 seems non-functional

Post by dastels »

Awesome!

Dave

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