@Eddie radiated or conducted?

But is it, volts, millivolts, amps, hertz, etc?

well, I'm still not sure...

how do you estimate the amount of transient switching current a signal or IC will generate based on the datasheet parameters for the signal's driver or the IC in question?

So, like this made up sentence: The EMI in the air added +5 thing-a-ma-jigs to the signal on my wire. What is a better word for 'thing-a-ma-jigs' ?

@Eddie well, in that case, it'd be volts :)

perfect, thank you kindly! (again)!

Datasheets and appnotes need more cartoons

If I ask on the main site what's the best cartoon you found in a datasheet/appnote, it will certainly get closed down as "primarily opinion based" though.

you know what I hate? people who believe in invisible power and ground pins

@Shalvenay I dislike more people who upvote questions asked by people like that electronics.stackexchange.com/users/90368/…

@RespawnedFluff I upvoted the answer :P and didn't touch the question

@Asmyldof do the find /mnt/SD and have a look what is really there

@PlasmaHH Can only do that on an external system, but it looks good

@Asmyldof best would be to put it into the rcS to see it in that actual moment

just to be sure before that add some cat /proc/mounts because who knows, maybe soemthing went wrong with mounting wihtout outputting anything... I just had that with my current hdd stuff... mount /dev/sdcc /home and ... nothing happened, but return codes are fine

I think I found some fakes on Alibaba (big surprise, I know!)

It reminds me of a 2nd hand story I heard from a friend who told me he was asked by a bulk Chinese OEM: "what do you want us to write on the transistors?"

@RespawnedFluff I alway wonder if for those they set up their own process or took over some older process that roughly is equivalent to some old tranny that isnt produced anymore

@RespawnedFluff Very common, but it's also not unusual for them to (try to) make them close to the original

I have been asked "What would you like printed on it" as well, and that's a great tactic of them, because the setup costs for that in China are negligible, but it offers a customer the option to use a BC550 with the print "FURGLE" thus obfuscating functionality

Something I'm not a huge fan of, but many people are

@PlasmaHH They usually do whatever they can do with their old PAS/Nikon steppers, which is transistors and LEDs

@PlasmaHH I'll have a go tonight

o.O

We now also have an egg cooker for our company Lunches

...

@ThePhoton need a job that has free eggs?

:-P

egg cooker? how useful for a company

Deffo

I can think of countles occasions where I wanted to cook an egg

that is, if you define countless as including zero

shrug

gahgwghagagagagaaaaaaaag

yup

I was [embarrassingly] out of phase in my last question (off by 180). Funnily enough the same day I answered a freshman's question who was off by 1 in a calculation.

.... TI makes some annoying chips and datasheets...

"We have a 12 bit DAC with 8 channels. first 2 bits of the packet have to be 0, last 4 bits are don't care, 3 bits in the middle are the address of the channel and the data is also somewhere in the middle"

Jeeezes!

1: I count 6 basically unused bits + 3 addressing bits = 9 bits, so the channels could have been masked, so that I can just send the same data to everything at once

2: Data not as first or last bits of a packet? Srsly?

And then I'm not even talking about there weird scheme for loading buffers and then outputting them

Add to that the fact that TI's ARM DS calls normal SPI mode "Freescale 4 wire" with the option of Inverted Clock Polarite and Inverted Clock Phase, where seemingly the polarity is actually inverted when you don't enable inverted (as my scope sees it), rather than just going with the rest of the world and calling them MODE 0 through 3

Oh, the DAC datasheet also mentions nothing about those details, just "when this and that, 4 wire SPI mode"

facepalm great way to not get repeat business from me

@Asmyldof That is a perk I haven't heard of before.

@Asmyldof Usually they have a 16-bit version where the last 16 bits are the data. For the 12-bit version they just 'X' out those 4 bits, so your software doesn't need to change when you switch DAC PNs.

Either to save cost or improve resolution.

@ThePhoton Just that this series comes in 12 and 10 bit, but

It's just bloody annoying

Takes ages to load all the data to 50 channels, whereas using those "spare bits" properly it'd have been 7+ times faster

@ThePhoton We have many perks nobody ever heard of before

@Asmyldof Still you can just calculate the desired output in 16-bit resolution and throw away the 4 lsb's. (Assuming the 4 don't care bits are actually contiguous with the data)

@Asmyldof Pickled fish?

Another one would be working with me before I become infamous

@ThePhoton I know, but now I'm shifting all over the place and sending 8 packets for 8 channels with the exact same data, whereas those packets all have 6 invariably 0'ed bits, which would have allowed 1 packet for all 8 channels

@ThePhoton No. We do have salmon at the lunch some days though

And today we were discussing the amount of work it'd require to improve the kitchen with actual cooking gear, so....

Where the CFO had a comment "That would require quite a strong motor" to which I could happily reply "That, is not an issue"

@Asmyldof "actual cooking gear" means a rotisserie capable of roasting a whole pig?

@ThePhoton Well, kebab did come up

I said, if we do that, we should just get ourselves a chef as well: "Hey, John, I'm hungry, make me a kebab sandwich"

... We do have fun at the lunch table though :-)

@Asmyldof ik verstaan geen nederlandse grappen

@ThePhoton Luckily we have more people who don't, so large parts are already in English

:-P

@Asmyldof Also, I bet you'd laugh pretty hard if you heard me try to pronounce "geen".

Keil uVision, while I'm complaining, is archaic and not at all worth the money

@ThePhoton You underestimate my selfcontrol

Don't you juts love it when [Name Redacted due to NDAs] makes chips for [Redacted] and [Redacted] that have what is basically 90's levels of digital circuitry around what is supposed to be 2014'ish [Reeeeddddaaaacteeeed] circuits

"Reset must be externally held low until all power rails are stable, or else hellstorms" (I paraphrase)

"Setup time may take as long as N or M miliseconds"

@Asmyldof Are we talking about a company I might be familiar with?

"Interface supports speeds up to 400kHz" said as if that's a feature these days, rather than a worry

@ThePhoton quite possibly

@Asmyldof If it's I2C, that's a feature.

If it's MDIO, it's a bug.

@ThePhoton Except for that everything else on the bus is 2MHz+ and it's a dual function block that also supports SPI at the breakneck speeds advertised

@Asmyldof Actually if it's I2C it shows an astonishing level of standards compliance, assuming we're talking about the fiber optics industry.

Oh, and if I talk to something else at 1MHz, it locks up permanently, isn't that fun?

@Asmyldof OK, now you've at least relieved my concern that I knew exactly what chips you're talking about

@ThePhoton I know, already have to make the HW designer switch peripheral devices for the MDIO routing (oh, he's so happy with me) because the dedicated I2C only acieves 3MHz

@ThePhoton :-D

Whereas I can hack the SSI units to support I2C at variable frame and word widths up to 6MHz

If he does what I say

^^ risky assumtion there :-D

Wow, Raspberry Pi zero for $5. raspberrypi.org/blog/raspberry-pi-zero

has no camera ribbon header, lame. That's all I use RPi for, is machine vision modules.

Seeing as I very actively try to not use the RPi for anything, this is a much smaller waste of money in the unlikely case I get drunk and decide to buy a box of 100 RPis

The unlikely very definitely refers to part 2 of that statement

Very sad, however, that there is a need for you to say that out loud...

yeah, why does she say that. Way to encourage thoughts of "why aren't there more" and "wasn't there always women on stage"?

...so, my professor (don't ask me why) wants me to put a memory-mapped I/O port in a memory space that's already full to the brim with RAM. how does one decode this?

> If Batteroo is genuinely using a custom IC, they may even not be able to come to terms with the MOQ necessary for a production run.

What does "MOQ" mean in this context?

@jippie Minimum Order Quantity

@Shalvenay thnx

I was doing some image cleanup and discovered I had this; it's from an article, but I don't remember which one. The claim was that over-driving those jelly bean transistors for short periods is quite ok. Thoughts?

kikegeek.es

analog-praxis.de/…

@RespawnedFluff not really about overdriving I guess.

> As the forward current-gain curves (HFE) in Figure 2, ask the manufacturer for these low-power components normally no data about 0.5A available. The circuit may, however, provide much higher currents than 0.5A, as the oscilloscope waveform shows in figure 1.

from google translate on the 2nd link

so high current pulses with short pulse durations?

2.5A out of transistors rated for ~100-200mA?

I know FETs have a higher pulsed than continuous Id, but I don't know about BJT Ic

What just happened to the good old "we try three times to deliver" thing fromUPS?

@PlasmaHH did the brown-shirted gorillas fail to deliver?

@Shalvenay I was not at home, how mean

@jippie You already asked that once before

@Asmyldof reference pls

@Shalvenay You need to specify what you mean with: 1. memory space that's already full to the brim with RAM; 2. Decoding it.

And also what the environment and language is, at the least

& BTW it is not my daily jargon, I have an excuse

@jippie No, because I'm hungry, tired and still at the office getting ready to go home

@Asmyldof my professor wants me to put a memory-mapped I/O port and 64kB of RAM into the 64kB data address space on an 8051

@Asmyldof DINMP

@Shalvenay Hm. Now you made it sound like homework and I'm not in my best mood

Which if you ask @jippie is still horrendous

Maybe I should go to the city and have dinner ther

e

And then party with hot, young lady students

Oh wait, Eindhoven

@Asmyldof You are aware of the fact that my little niece studies at the university?

I know where to find you.

@jippie I remain underwhelmed

@Asmyldof it's a class project requirement, actually

@Shalvenay Banks

That's your hint

@Asmyldof ...if it was more memory, I'd get that...but bank switching for 1 byte I/O port? that's bloody silly!

Unless your system has quantum memory with the ability to read your mind about where to leave the data if you write to @address(IOMapped)

@Asmyldof good one xD

on another note -- is it a good idea to put a decoupling cap on connectors to modules, or is that just not needed? (a character LCD module in my case)

@Shalvenay place them as close to the consumer as possible.

@jippie of course, but my question is more "should I expect modules to provide their own decoupling, or should I provide some kind of decoupling on their behalf?"

depends on the module

there is no such thing as too much decoupling

well, I guess there is, but that doesn't happen very often/easily.

@jippie mouser.com/ProductDetail/Newhaven-Display/NHD-0420D3Z-FL-GBW-V3/… is the precise P/N I'm using here

Don't know. Check what the datasheet writes about it.

I'm off to bed.

/night.

@jippie it doesn't write anything, and gn

@Shalvenay If your powersupply has a capacitance budget you need to decouple carefully, but might want to regardless. If it doesn't have one, or it's insanely high, as is very usual, then you are better off putting a 2u2 to 10u across a plug in just for safety

Never trust someone else to do their job, because often they don't

I am definetly out of luck with my "cheap peltier beer chiller" experiment... bought a cheap cpu heatsink with heatpipes on ebay... on paper it would fit perfectly... but... the base plate is warped so there is 1mm space on one side between the peltier and the heatsinik... wtf?

> ... bought ... on eBay ... [doesn't work] ... wtf?

@Asmyldof I suppose I can slap another bulk cap across the power and ground pins on the LCD module connector (although it'll be a 22µF since that's what's on my BOM)

@Shalvenay probably fine. But you may also want something quick, like a ceramic

"Does ATmega328 On UNO need to be burned" --> Yup, that's why good EE engineers carry lighters

@Asmyldof the 22µF is a ceramic ;)

DEATH TO LIFE-LIMITED CAPS!

@Shalvenay ...

(don't worry, there's a 100nF in parallel with it)

@Asmyldof what? are you pro-electrolytic-capacitor? :P

...