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Assembled -- Won't turn on at all
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Assembled -- Won't turn on at all

by natsuba on Mon Aug 18, 2014 11:07 am

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Hello,

I assembled the SPOKEPOV kit, I added batteries, and I pressed the on button but the test lights never came on.

To try to address this problem so far:

1. I have added solder to all the connections
2. I have tested that the chips were getting power using a multimeter
3. I have replaced both chips with chips from another kit
4. I have checked for bridges between the connections
5. I have checked that all the lights were attached correctly

Not sure what else could be going wrong! I would LOVE a second opinion!

Thank you!

(I had a bunch of detailed images, but the limit is 3 attachments.)
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natsuba
 
Posts: 2
Joined: Mon Aug 18, 2014 10:28 am

Re: Assembled -- Won't turn on at all

by adafruit_support_rick on Tue Aug 19, 2014 12:25 pm

natsuba wrote:1. I have added solder to all the connections
2. I have tested that the chips were getting power using a multimeter
3. I have replaced both chips with chips from another kit
4. I have checked for bridges between the connections
5. I have checked that all the lights were attached correctly


I was ready to go with an unprogrammed microprocessor, but #3 seems to kill that idea.

Even if some of the shift registers or resistor nets were not installed correctly, *something* should happen. It all comes down to either something wrong with the micro, or all the LEDs are backwards.

I'm stumped. The build looks good. Do you have access to an oscilloscope?

adafruit_support_rick
 
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Location: Buffalo, NY

Re: Assembled -- Won't turn on at all

by natsuba on Tue Aug 19, 2014 3:09 pm

I fixed my problem -- I *thought* I had the lights on correctly. I read a few more posts on the forum and found that the LED placement instructions on the circuit board were printed backwards (positive side facing in). After switching around all the LEDs, it worked as expected. I was using the instructions on Instructables, but noticed that a note had been made in the instructions for the red light kits here.

Thanks for your response, though!

natsuba
 
Posts: 2
Joined: Mon Aug 18, 2014 10:28 am

Please be positive and constructive with your questions and comments.