@CamilStaps When you make a program for a micro-controller that has networking abilities (because of networking hardware) can you like connect to servers and stuff?
user61389
@coding_corgi yes, if you implement it ;)
user61389
If you have a short question, please quick, otherwise: tomorrow ;)
So I've recently been playing with my first Arduino, until it, for some weird reason, stopped working.
What I did:
I had it attached to a breadboard. When I say attached, I mean it was supplying power to the breadboard. I was messing around with a motor, which wasn't performing very well when ...
I have connected my Uno (freeduino USB 1.1) to a wifi shield but when I run a program for network scanning, the serial monitor prints:
WiFi shield not present
The code is here: http://arduino.cc/en/Tutorial/ScanNetworks
Shield is properly connected, LED named L9 lits up on powering up the ...
@angelatlarge Here add this part to your answer: the max voltage an Arduino Uno can withstand is 12V (found here: arduino.cc/en/Main/arduinoBoardUno). You had 10 AA batteries so that would be approx. 15V.
@coding_corgi I don't think that's relevant here. The max input voltage spec applies to the voltage supplied from Vin connector. The OP was using the Arduino to power the breadboard, meaning that most likely the 5V header pin was used. This means that +15V was applied to the internal +5 rail, not to the power connector which then goes to a Vregulator.
@coding_corgi I think you were. I am not: I am assuming that the barrel input was either used to power the Arduino Uno (not the breadboard), or that it was unused and the Arduino was powered from the USB connector.
But the +12 spec does refer to the barrel connector, yes.
It appears that the reading of the datasheet whereby TLC5940 can sink only 120mA/chip is incorrect:
Rather, it seems that the correct reading of the "\$I_O\$ Output Current (dc)" value on page 2 of the datasheet is as maximum current per channel, which is also the interpretation arrived at by ...
@coding_corgi Yeah, that's incorrect. Looking at the product drawings on the last page of the datasheet, this toshiba product is complete, and that's what Sparkfun sells. Sorry.
I got a couple of these in, were confused at first by the pads on the bottom and the pads on the sides. But after looking at it under a microscope, I see the pads on the bottom are connected to the side pads.
I'm working on an RGB LED project. I'm using this as the power supply: https://www.sparkfun.com/products/114
It uses an LM317 which according to the data sheet can supply up to 1.5A. The LED's I'm using are these: http://www.adafruit.com/products/314
And the mains power supply I'm using is a 12v...
I haven't seen them and i'm pretty sure they do not exist.
The smallest i could find were 3.5 mm and that does not fit your requirements.
You need to buy a pcb adapter board or build / manufacture one yourself.
@coding_corgi Oh, a half dozen downvotes on his answers would cheer me up plenty. I won't comment because clearly having posted the earlier answer, I represent a vested interest.
@angelatlarge Do you see where another "You, sir, are a moron" comment is bubbling up today? Gosh, I wish I could be as much of a grump as the other chap.
@coding_corgi Local, one in Mumbai and one in Gujarat, depending on volume and complexity. The Mumbai one is a new discovery, insanely low prices, but they're the ones that caused me to have to restructure two boards today, because of their limitations in manufacture.
@AnindoGhosh I did, but that doesn't need to mean much. Sometimes I answer a question, post it, and then notice that it is similar to someone elses. I think that happens here a lot.
@AnindoGhosh It is hard to tell here because the basic idea here is clear: the Vreg needs to dissipate extra voltage as heat. So I would think that many people can come up with that. But they might have different math skills nonetheless.
@angelatlarge I would have assumed so had it not been for the "Recommendations:" text - that's rare enough that it appearing 5 minutes after mine told the story.
@AnindoGhosh Yeah, I think you might be right. Still it is probably best to assume weird coincidence until we have more evidence (meaning spikee steals an answer from me and I get hopping mad) :)
This site encourages definitive answers, and "I couldn't find one so they don't exist" doesn't qualify. This answer doesn't really add any value. — Anindo Ghosh7 mins ago
@angelatlarge Hehe. No, what nailed his coffin for me was his subsequent answer, which basically says "I've never seen X, so it doesn't exist". As a comment, that'd be fine. As an answer, it's just a shoddy rep-hunting attempt.
@AnindoGhosh You think? Say I asked: Is there a PWM LED driver that can control 30 LEDs without multi/charliplexing, and sink 150mA from each. Is there no way to "answer" that question?
@coding_corgi The problem with that is, I know exactly where there's a shop which sells 2.54 mm pluggable screw-LESS terminals, but no datasheet or online link to back up an answer. I don't write answers without being able to back them up, and a video clip of the store, taken on Monday morning, won't count :-)
@angelatlarge There's definitely a way to answer that question: Either "Here, this one", or "here, this is why the laws of physics prevent such a product being made"
@angelatlarge "Here are the E12, E24, ... standard resistor values. Of course, 1% and 0.5% resistors are also sold for practically any value you can think of, here's a link for a $7 resistor at Digikey" :-)
@AnindoGhosh Let's step back a bit. Here's my overall point: Spikees answer is mostly useless, but not entirely. I can imagine a decent answer that says: "Thing X is at least very uncommon, and may not exist at all. Reasons: a) I've been around longer than Tony and never seen one b) Thing Y exists and is close to thing X, so close, in fact, that it can function almost the same way, and it is expensive/inefficient to make both thing X and thing Y." I would consider that a useful answer.
@coding_corgi Ah, you are responding to me. Hmm... yes and no. I can imagine a question where the OP is confused, and the answer point out that thing Y is good enough. Not off-topic then. But otherwise, you have a point. But every "where to get X" question can be treated as "Why doesn't X exist" question because the OP presumes that X exists.
Pluggable 2.54 mm screw terminals with female spring-clamps. Here is one example:
The datasheet is essentially one page:
The source of the above is here, but other sources show up in a web search.
@angelatlarge Now, just go ahead and upvote me like mad, I did scrape the info up because of your remarks - instead of going to sleep, it being nearly 4:30 am and me having to travel to Delhi in the morning. grump
AC on the other hand, the instantanous voltage is not the same, but varies. In fact, it oscilates between +X (positive) and -X (negative) voltage, right?
@coding_corgi These oscilations have a frequency, which doesn't concern us here, but for line voltage it is 60hz in the US.
Ok, so to make that AC signal into DC, we need to a) keep the first and third half cycles b) flip the second and third half cycles and then c) smooth out the humps and the troths so it is one continuous line. Does that make sense?
So basically the diodes are taking a chunk of the (let's say alternating between 5 and 15) AC and says, this current that I give out will be a stable 10V DC?
@coding_corgi So they can remove either the positive or the negative component of the AC signal. And if you have four diodes arranged in a clever way they can give the AC signal with the negative side flipped as positive.
@coding_corgi yes, to smooth out you need caps and resistors and/or inductors.
So I've recently been playing with my first Arduino, until it, for some weird reason, stopped working.
What I did:
I had it attached to a breadboard. When I say attached, I mean it was supplying power to the breadboard. I was messing around with a motor, which wasn't performing very well when ...
I have connected my Uno (freeduino USB 1.1) to a wifi shield but when I run a program for network scanning, the serial monitor prints:
WiFi shield not present
The code is here: http://arduino.cc/en/Tutorial/ScanNetworks
Shield is properly connected, LED named L9 lits up on powering up the ...
It appears that the reading of the datasheet whereby TLC5940 can sink only 120mA/chip is incorrect:
Rather, it seems that the correct reading of the "\$I_O\$ Output Current (dc)" value on page 2 of the datasheet is as maximum current per channel, which is also the interpretation arrived at by ...
I haven't seen them and i'm pretty sure they do not exist.
The smallest i could find were 3.5 mm and that does not fit your requirements.
You need to buy a pcb adapter board or build / manufacture one yourself.
Pluggable 2.54 mm screw terminals with female spring-clamps. Here is one example:
The datasheet is essentially one page:
The source of the above is here, but other sources show up in a web search.
