#k_star98 neopixel thread

1 messages · Page 1 of 1 (latest)

burnt sable
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@thorn agate see, that's what the REPL does for you

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we talked about touching up your soldering in the previous thread

thorn agate
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Yes already did them

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Auto-reload is on. Simply save files over USB to run them or enter REPL to disable.
code.py output:
red
Traceback (most recent call last):
File "code.py", line 20, in <module>
NameError: name 'time' isn't defined

Code done running.

Press any key to enter the REPL. Use CTRL-D to reload.

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The problem is that the feather and prop maker do not align perfectly, so on one side the pins are longer while on the other they are shorter

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By what i watched in the video metioned earlier in the conversation they did align nicely

burnt sable
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add an import time at the top

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could you take a picture of the non-alignment

thorn agate
burnt sable
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ok, so now this is an electrical/mechanical problem

thorn agate
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This is how i had to connect it

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Because of the battery port

burnt sable
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that's ok, not great, but ok. The main issue that I saw was that several pads were inadequately soldered

thorn agate
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Tried to solder them by making sure they do not connect with each other or touch

burnt sable
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there is very little or no solder connecting the pin to the pad on 2,3,4. 1 is OK but a little blobby (too much solder).

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The pins on the upper board are better soldered

image.png
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1 in the second picture

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try to make the pins on the left look like the pins on the right. When you use the soldering iron, touch it to both the board pad and the pin and the same time. Don't just touch it to the pin.

thorn agate
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Those are not made by me -1 on the secon pic

burnt sable
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well, they are a good example. DId it come presoldered or did someone do it for you?

thorn agate
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Presoldered

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Just how i bought it from adafruit website

burnt sable
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watch the videos too

thorn agate
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Alright will do

burnt sable
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if you can hold the board in place, that will help so it won't scoot around while you're trying to solder. if you have some clip thing, or even some tape or clay or putty, that will help

thorn agate
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I have helping hand

burnt sable
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excellent

thorn agate
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Will try to resolder tomorrow and will update. Thank you very much

burnt sable
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good night! good luck!

thorn agate
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Tried re soldering them. Probably will redo some

burnt sable
# thorn agate

those look better at the base. There's too much solder further up the pins, but it doesn't really matter. Heat where the pin and the pad are touching, and feed small amounts of solder in there. THere is no reason to have solder further up the pins.

thorn agate
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So they can be exposed at the top but need to be soldered at the bottom?

burnt sable
thorn agate
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Just tested with the resoldered pins but still no light

thorn agate
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At this point i dont know what is happening and what is wrong. I don’t have much time either so if there is any alternative that would be easier i will take that.
I have followed strictly the tutorial but it seems that nothing is working and i really don’t know why🥹🥹🥹🥹

burnt sable
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if you had another NeoPixel strip I would tell you to try that one to see if it's the board assembly or the strip (or the wiring to the strip)

burnt sable
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or, if you have another board that can drive the neopixel strip (an Arduino would be easy), then connect the strip to it and see if the strip works. Again, it's trying to narrow down the problem to the strip or not.

thorn agate
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Regrettably i don’t have neither a strip, nor a board. I was looking to buy from Bulgaria Arduino Uno R4 Wifi. Is that a good match for the neopixel strip? Also if i look to buy from a local store what type of model should i look for? I know that they need to be addressable lights but there is a code something like WS2812B. If i could i would have purchased from adafruit but most likely it wouldn’t arrive on time so i have to look for an alternative from in here.

burnt sable
thorn agate
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Not sure, will do a research do check if there are any. I have awen the r4 wifi being sold in here on a website

burnt sable
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an authorized distributor of Arduino stuff. In addition to the R4, they have

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all found with Google site searches like site:*.bg arduino

thorn agate
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I had checked them yes but was not sure if they are all authorised. Will give the microchip and strip to a coworker of my husband if he can check it hopefully.

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As pee the strip, i tried to connect the battery (lipo) one to the other end od the neopixel. There is a port that fit for the battery. My question is if the battery is 12V is it possible to burn the strip by connecting it on the DOUT side?

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Since i couldn’t get one from adafruit i got this one I just found this on AliExpress: | 3.7V 7.4V 11.1V 12V 18650 8000mAh with wires Lithium ion rechargeable battery with PCB for Bluetooth Speaker Solar headlights
https://a.aliexpress.com/_Ey8WzIu

burnt sable
thorn agate
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So there is great possibility i might have burned the strip by connecting it to the DOUT side of the Neopixel?

tribal forum
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Excuse me for popping into your thread. 5V and 12V Neopixel both use 5V datalines. If you hook up 12V power to the 5V neopixel's power pins that can damage them. But in either type (5V or 12V), plugging the 5V data line into the Dout side of the neopixels shouldn't damage anything. they just won't get any data.

thorn agate
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And no worries. I am working for a first time with microchips and stuff like this, so any tips and advice are greatly appreciated!

burnt sable
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You would apply the control signal to DIN. That would be a 3.3V or 5V signal. A 3.3V signal can be marginal when the strip is powered at 5V.

thorn agate
burnt sable
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Another way to fry the strip would be to apply reverse polarity voltage, even at 5v. It might take a few seconds, but it would also be fatal.