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No power to circuit board?


47d0be078bbb143e1784c1cf0aa2a747?s=80&d=mm&r=g
(@philipc)
Member
Joined: 2 weeks ago
Posts: 3
Topic starter  
Hi. I’m struggling to get the circuitry to turn on. 
 
There isn’t any on switch so I assume as soon as the power pack is plugged in, the fan should start spinning (doesn’t look like there are any LED lights to indicate power on). 

I’ve double/triple checked the fan polarity as well. 
 
I’ve checked the power pack with a multimeter and I’m getting 12V from it. 
 
Do you have any other suggestions?

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350a26dd49eb55d3494500240423a207?s=80&d=mm&r=g
(@robotn1)
Member Admin
Joined: 6 years ago
Posts: 757
 

Do this: carefully, check if the pins where you are connecting the fan to, deliver 12v. Try not to touch both pins at the same time. If you can use to a motor cable, do that. Connect the motor cable to the headers and measure, on the other end of the cable so you can be sure you are not creating a short circuit. That is easier.

If you are getting 12V that means that the fan is broken or was connected backwards and got burnt.

Besides this:

1) Are you able to see the WIFI network created by the DEVIA board?

2) If not: upload the test code from here and tell me how it goes: https://www.jjrobots.com/devia-control-board-test-code/


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47d0be078bbb143e1784c1cf0aa2a747?s=80&d=mm&r=g
(@philipc)
Member
Joined: 2 weeks ago
Posts: 3
Topic starter  

Thanks for the tips.

So I think the issue is the PCB doesn’t receive any power at all.

I’ve now checked:

  • the power supply outputs 12V using a multimeter
  • the pins on the bottom of the PCB directly under the power socket do not output any power (can’t measure any 12V)
  • confirmed the two fan pins do not output 12V
  • No wireless network is broadcast

Maybe the socket has a loose connector faulty contact that isn’t passing the power through to the PCB?

 


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47d0be078bbb143e1784c1cf0aa2a747?s=80&d=mm&r=g
(@philipc)
Member
Joined: 2 weeks ago
Posts: 3
Topic starter  

Ok I’ve managed to get it to turn on now after using another 12V power supply that I had.

Looks like the one that comes with the kit doesn’t connect to the power socket on the PCB snug.

Now to try and get the robot up and running!


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