Really? I just asked a question. 
What "wrong conclusion" did you have in mind?
No - you didn't.
I helped the OP out by posting a link to something he asked about. You saw an opportinity to try and score some cred/points by trying to needlessly warn them off using the barrel connector, which appears to have lead them astray judging by their reply of "Just my rotten luck then [snip]". And it's not the first time you've tried to do that with my posts. And it's not the 2nd either.
In response to that I suggested to them that "I'd encourage you (ie them) not to "sweat" using the barrel connector; it's there for a reason - it works - it just has limitations."
That really should have been the end of it but - oh no - you're in full defence mode now from being called out, so you're trying to reinforce a position that he's better off using 3 batteries ... before going into full "back-peddling-faster-than-an-olympic-cyclist" mode with your fine forensic analysis of a fully lit LED matrix at maximum brightness (as if that's what most people need to run most of the time).
Then you thought you'd try for a bit more cred/points by thinking you could subtley point out what you thought was my incompetence in the design choice I made for that circuit.
And when you got egg on your face for that you're now trying to play the old innocent eyes "what did I do ... I was only asking a question".
So no - you weren't. You know EXACTLY what you were doing - as do I. So what say we stop playing pretend?
Just for everyone here. I was ordering more breadboards of various sizes on aliexpress (I only have one large one. I want smaller ones) and I saw this video on the smaller breadboards.
Seems like with a dab of solder I can harden the resistor leads (both regular and photocell) enough for them to stick in correctly.
This should be quite useful. I'll try this as soon as I can.
Just to mention that breadboard quality varies widely (like night and day). I recently bought some inexpensive larger boards where the 5-pin rails were so tight its practically impossible to seat a through-hole part without crumpling the pin(s). On the same boards, the power rails were so loose, wires/components can fall out.
And guess what? I am going to continue to post that warning, as will others though perhaps with less emphasis. Notwithstanding your evident paranoia.
The warning is valid, and necessary. The on-board regulator has limited capacity, useful perhaps at - as I said - 9 V regulated supply (others commonly advise no more than 7.5 V regulated) and capable of operating a few additional modules with very modest current consumption. Advising "what you can get away with" is poor engineering practice, at least by my standards.
I remain validated by the frequency of questions posted on these fora where failure to comprehend the limitations of the on-board regulator, misled by the antique descriptions in the Arduino "tutorials" sections, is precisely the problem.
Standard through hole 1/2W resistors are meant to have 0.6mm leads. Some
cheap ones have only 0.36mm leads (which is more standard for 1/4W resistors).
The latter can be easily bent, so you have to ensure they are straight before
plugging in, and it helps if the ends are pointy - cut the tips of the leads with a
side-cutter oriented to give a point to lead.
I always trim resistor leads down by about 10mm anyway for breadboard use,
this helps stiffen them up and reduce the forest of components effect.
If you have some tweezers you can grip the lead close to the breadboard
to help push the lead in - you can rotate the component to get the first lead
in, but the second one doesn't have that option, which is where tweezers are
helpful - I love my ceramic-tipped tweezers, very tough, non magnetic, non-
conducting.
Quality breadboards are much easier to plug components into, some cheap ones
are hopeless and this may well be part of your problem.
@Paul_B @anon12459472
Come on guys, keep it civil, the forum is here to help people, not to have public arguments.
Thanks,
This topic was automatically closed 120 days after the last reply. New replies are no longer allowed.