Meanwhile, there are reports of a shortage of packing materials in Europe. The shortage seems to be centered over the Netherlands. When asked about the shortage, Asmyldof replied "No comment" and returned to wrapping packages to be sent to Germany.
Hey, hopefully not too ignorant of a question... I want run an ATMEGA328P-PU chip on a breadboard without the Arduino board (like this) and according to the datasheet it looks like it the current requirements are pretty low. The power supplies I have are somewhere around 5V, 220mA up to 1A... Do I need to worry about the current? I'd prefer not to fry the chip
From what I'm reading, it looks like it won't use more A than it needs, but I don't want to find out that I'm wrong the hard way.
WHen you say they aren't designed to allow much more than 200mA on the power pin, does that mean if I used a PS with more than that it could hurt the chip?
I don't see anywhere in the datasheet where it talks about max current
@AndyD273 No, it means you should make sure not to try and light up 40LEDs, one on each I/O pin, using 20mA per LED, as that will draw 600+mA through the power pins
Although another way to protect against that is making sure the supply is current limited, but then you also want to find out about Brown-Out and how that works
I'm investigating the idea of transporting gigawatts of electrical power to the first stage booster of an electrical rocket.
The first stage booster, like Falcon 9's recoverable first stage, stages at 70km altitude, 60km downrange, for a diagonal distance of 92km.
I'm using 100km for a nice, ro...
anyone able to recommend a good Q/A on here regarding how to reduce inductive ripple on square wave transitions (2Mhz signal in my case)? I have a signal coming in from a ribbon cable and going into a level shifter, and i'm seeing up to 1V inductive spikes on the leading and falling edges of the square waves. Could also be my shitty probe and poor grounding though
If I measure a DC/DC at 3MHz ish the waveform may look perfect with ground spring or snake-tongue probe (literal translation, pologies) but with looped ground wire I will see ringing
oh and some of the signals are totally unconnected, which of course will show up terrible because theres nothing keeping the levels from floating all over the place
i am going to connect them all and probe better and see what it looks like
if there WAS ringing on these signals, how would one effectively filter the ripple? Would you use an RC filter on the inputs after the ribbon lands on the board?
@KyranF That depends largely on what your signals do. I have no context whatsoever, but I have never had to do any complicated trickery with digital signals beow 40MHz over such chort distances
@KyranF, if you want to reduce inductance seen by signal going over ribbon cable, put that signal next to a ground wire. This might mean using a wider ribbon so you can have more ground wires.
I'm not on board with Asmyldof on using fancy cable. Standard 0.050 pitch ribbon should be fine for 2 MHz. I do agree that slowing edge speed will reduce ringing.
@ThePhoton I offer options knowing nothing of the project and connector requirements. fine ribbon and standard pitch foil backed cost nearly the same here
And I did also mention signal separation on finer pitched ribbon
Important note: although I use references about the current President, my question should be regarded as a general one, not specifically related to Donald Trump.
According to [this article] Donald Trump disclosed a few details of one of his previous physical examinations:
Bornstein’s letter ...
Important note: although I use references about the current President, my question should be regarded as a general one, not specifically related to Donald Trump.
According to [this article] Donald Trump disclosed a few details of one of his previous physical examinations:
Bornstein’s letter ...
