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Post by bradsour on Aug 25, 2018 15:46:34 GMT -8
Hello,
Today I was finally taking the time to put together my BC24 weather station Kickstarter Edition with my son. The tutorial is great and easy to follow as stated below. Unfortunately when I plugged in my BC24 (which is about 4x bigger than I was expecting it to be!)... nothing. The OLED gives no response, and the LEDs of the BC24 do not light up at all. I checked the voltage of the board and it's at 4.7 volts, I also checked the voltage at each end of the oled cable and it reads 8.2. I double checked that all the connections are set up correct and that they are all seated properly. Not sure what else to do at this point. Any help would be appreciated. If you need me to take this to support on your page let me know.
Thanks,
-Brad
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Post by SDL on Aug 25, 2018 15:57:01 GMT -8
Brad,
First thing to do is measure the VDD on the OLED cable again? 8.7V? Doesn't sound right. Not at all.
BP
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Post by bradsour on Aug 25, 2018 16:07:55 GMT -8
I've measured multiple times... and just did again. Still 8.2 at both ends! It's crazy!
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Post by SDL on Aug 25, 2018 16:17:30 GMT -8
Unplug the OLED device from the BC24 and check 3.3V pin (measuring from ground) on JP8/15 (check the spec to see where I came up with that). If the +5V pins marked on the board read 5V, then there is no way to get > 5V on the board, from the board components. No inductors on the board. www.switchdoc.com/wp-content/uploads/2018/07/BC24_072318-V1.2.pdfBP
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Post by bradsour on Aug 25, 2018 16:51:40 GMT -8
I checked the spec and see JP8/15 on it. But I don't see where on the board it could be. JP8 is only 12 pins. Is JP11 and JP8 swapped? JP11 says it's only 12 pins, but on the board has 16.
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Post by SDL on Aug 25, 2018 20:26:53 GMT -8
I'll bet you are right. We better fix that!
BP
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Post by SDL on Aug 25, 2018 20:26:56 GMT -8
I'll bet you are right. We better fix that!
BP
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Post by bradsour on Aug 26, 2018 7:45:52 GMT -8
I took the reading from JP11/15 and JP11/13 and get 1.002.
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Post by bradsour on Aug 26, 2018 7:47:46 GMT -8
When I do JP4 to JP11/15 I get the 8.2 value.
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Post by SDL on Aug 26, 2018 10:30:06 GMT -8
OK. This is bizarre. Send your BC24 back and we will test it and replace it.
Of course, this is the cool part of the job.
And you are looking at V? Not mV? Post a pic if you would.
RMA#: SwitchDoc Labs RMA#082718-01 909 S Shelley Lake Lane Spokane Valley, WA 99037
BP
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Post by bradsour on Aug 27, 2018 3:43:43 GMT -8
Ah, you are right, it's mV. This would mean very little power is getting through. I checked the charging brick on a tablet and it was charging it. I checked a secondary charging brick as well and same results. So it seems that not enough power is making it to the board?
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Post by SDL on Aug 28, 2018 7:49:14 GMT -8
I would guess the power supply is fried. You were violating physics coming up with 8.2V without an inductor on the board! Well, there are some other ways (charge pumps for example) but there is nothing on the board like that!
BP
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