Electrical Engineering V3

[Ddrl46]

And thus the magic smoke escaped, gotta love the good ol RIFA mains rated capacitors!

[url=http://i.imgur.com/ULD2BEJ.jpg][img]http://i.imgur.com/ULD2BEJl.jpg[/img][/url]

I knew I should have changed them as soon as I saw them...

[nikomo]

It begins, Arduino vs Arduino.
[url]https://www.unitedstatescourts.org/federal/mad/167131/[/url]

[LoneWolf_Recon]

[QUOTE=nikomo;47358075]It begins, Arduino vs Arduino.
[url]https://www.unitedstatescourts.org/federal/mad/167131/[/url][/QUOTE]

Supposedly there's [URL="http://readwrite.com/2015/03/18/arduino-open-source-schism"]internal disagreements[/URL] between founders. Forgive my lack of legal understanding, but since all of arduino is open source why does it matter about silly trademarks beyond 'brand name' parts?

[nikomo]

The overpriced official boards are supposed to fund development of the software, and future boards.
Right now, the money that you buy an official board with, goes to Arduino SRL, instead of the LLC, so all you're doing is buying an overpriced board with questionable build quality and the money goes to some random dude instead of the Arduino project.

[MIPS]

Hence why all my pro minis are $2 clones.

[kokonut]

So we use arduino nanos for a product at work, and my boss ordered what he thought was 100 arduinos.... turned out he ordered 100 lots of 5 :U

[pentium]

You just might end up with a few extras there.

[nikomo]

Well, at least now you know ahead of time what micro your next product is going to be using.

[gamerpaddy]

Im new into programming STM32 devices.
got a STM32F103C8T6 and ST Link V2 (usb stick) programmer
after hours of trying i got emblocks with GCC and ST Link utility working

within main()... while(1) the device is running on 3Mhz
how can i speed this up? The device itself has a 8Mhz crystal, and specs are: 72Mhz

my code:

#include "stm32f10x_conf.h"
#include "io.h"

int main(void)
{
    int a = 0;


    pinMode(GPIOB,GPIO_Pin_6,GPIO_Mode_Out_PP); // someone gave this to me, im arduino fan
    while(1)
    {
        a=!a;
        GPIO_WriteBit(GPIOB, GPIO_Pin_6,a); // Pin B6 square wave at 1.5MHz
    }

}

GPIO Speed is "GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;"

[proboardslol]

[QUOTE=kokonut;47361889]So we use arduino nanos for a product at work, and my boss ordered what he thought was 100 arduinos.... turned out he ordered 100 lots of 5 :U[/QUOTE]

I'll take a couple hundred off your hands

[Van-man]

[QUOTE=kokonut;47361889]So we use arduino nanos for a product at work, and my boss ordered what he thought was 100 arduinos.... turned out he ordered 100 lots of 5 :U[/QUOTE]

I'll gladly help your boss get rid of them for free.

I'll even come pick 'em up in person

[editline]derp[/editline]

Don't believe flagdogs lies and deceit, only the colors are true.

[MadsAG]

Finally got myself some good tools.

[img]https://dl.dropboxusercontent.com/u/100328/Facepunch/Billede%2020-03-15%2019.50.53.jpg[/img]
[img]https://dl.dropboxusercontent.com/u/100328/Facepunch/Billede%2020-03-15%2019.51.11.jpg[/img]

Electronic Instruments Power Supply SN19 0-30V, 0-10A (Former B&O Power Supply series)
DataTaker DT800
Rigol DS1054 (hacked to DS1104Z with all options except 500µV)
Hakko FX-888D
Hakko FA-400
BP Precision 2709B
Weller WHS 40 (ugh, I really don't like this one)

I need some shelves and proper light.

[Chryseus]

[QUOTE=AGMadsAG;47364585]
I need some shelves and proper light.[/QUOTE]

[url]http://www.ikea.com/gb/en/catalog/products/00169659/[/url] best light.

[Cakebatyr]

[QUOTE=Chryseus;47364718][url]http://www.ikea.com/gb/en/catalog/products/00169659/[/url] best light.[/QUOTE]

Can confirm, I have two as project lights and a third as my bedside table light.

Only complaint is the AC adapter/plug thing, it keeps jiggling out of my sockets. Earth ground pin IKEA, get on it.

[No_Excuses]

[QUOTE=AGMadsAG;47364585]Finally got myself some good tools.

Electronic Instruments Power Supply SN19 0-30V, 0-10A (Former B&O Power Supply series)
DataTaker DT800
Rigol DS1054 (hacked to DS1104Z with all options except 500µV)
Hakko FX-888D
Hakko FA-400
BP Precision 2709B
Weller WHS 40 (ugh, I really don't like this one)

I need some shelves and proper light.[/QUOTE]

Yeah well...I have a $30 multimeter that forgets what setting you put it on and often gives incorrect readings until you turn the main dial back and forth. Also the overshoot is amazing. You probe a 4V supply and it will read like 40V momentarily.

It's on the list of things I really need to upgrade.

[woidoi]

my cheap multimeter has some issues with the fold out lcd display having lines not become visible, which is fixed by jamming a piece of cardboard behind it :v:

[Van-man]

[QUOTE=No_Excuses;47371429]Yeah well...I have a $30 multimeter that forgets what setting you put it on and often gives incorrect readings until you turn the main dial back and forth. Also the overshoot is amazing. You probe a 4V supply and it will read like 40V momentarily.

It's on the list of things I really need to upgrade.[/QUOTE]

Damn, I have a 10$ multimeter that just needed a calibration (via internal potmeters) and then it was fine to use for even fine electronics.

[pentium]

[IMG]http://i11.photobucket.com/albums/a166/ballsandy/Computer%20related/IMG_8557.jpg[/IMG]

........fuck.

[TCWilliamson]

[QUOTE=pentium;47374096][IMG]http://i11.photobucket.com/albums/a166/ballsandy/Computer%20related/IMG_8557.jpg[/IMG]

........fuck.[/QUOTE]

Story of my life.

[Fourier]

[QUOTE=pentium;47374096][IMG]http://i11.photobucket.com/albums/a166/ballsandy/Computer%20related/IMG_8557.jpg[/IMG]

........fuck.[/QUOTE]

phahhahaha

happened to me too many times

[nikomo]

I'd feel sympathy if I wasn't too busy laughing.

[pentium]

That stupid plug aside.....all external work on that fucking teletype is now completed.

[IMG]http://i11.photobucket.com/albums/a166/ballsandy/Computer%20related/IMG_8568.jpg[/IMG]

That box was part of the power switching system. It's basically an outlet and two boxes glued or screwed to either side. It fits up underneath the stand and is almost invisible.

[IMG]http://i11.photobucket.com/albums/a166/ballsandy/Computer%20related/IMG_8558.jpg[/IMG]
[IMG]http://i11.photobucket.com/albums/a166/ballsandy/Computer%20related/IMG_8562.jpg[/IMG]

When you switch to LINE, a relay closes and the the outlet goes live, powering the 13V adapter for the modem. It also brings up the +5/+12 supplies which put the electronics into standby and lights the STOP button until START is pressed (and the teletype chatters away because there is no active device on the current loop inputs, so you still have the option of adding an additional device to the current loop if you prefer not to just use a modem/serial device). Once that happens another relay closes, the light goes out, the START button's lamp goes on, the electronics turn on (microcontroller, loop adapter etc.) and the relay in the grey box closes, turning the modem on. The reason for the plug and socket was I didn't want to cut up the original wall wart. In fact, all the cabling leaving the unit has a plug somewhere so you don't have to tear everything apart to separate the teletype from the base. It's just seven different style plugs which are impossible to mix up.

[Zero-Point]

[QUOTE=pentium;47374096][IMG]http://i11.photobucket.com/albums/a166/ballsandy/Computer%20related/IMG_8557.jpg[/IMG]

........fuck.[/QUOTE]

Happens to me all the time at work, except instead of plugs and their associated sheathings, it's flare nuts.
Fucking flare nuts.

[Doritos_Man]

I have my final project for my Circuit theory class coming up and I'm trying to find a project that my group can make. It doesn't have to be anything fancy.

[Chryseus]

[QUOTE=Doritos_Man;47387891]I have my final project for my Circuit theory class coming up and I'm trying to find a project that my group can make. It doesn't have to be anything fancy.[/QUOTE]

audio power amplifier
am radio
ecg
switching power supply
tesla coil
automatic coil winder
something with lasers
death ray

[nikomo]

I made a boost converter at school.
The regulation was off like hell, and a ton of other stuff was wrong. I was getting like 28% efficiency at best.

Just before going home, I hooked up an oscilloscope.
I had an integer overflow in the function that regulates the PWM. Well, there's your problem.
Probably going to fix that today and try it out tomorrow morning. Hardware problems are always more interesting when you involve software in them.

[TCWilliamson]

My work's new scope arrived today, It's a Lecroy wavesurfer 44MXs-b. It has windows xp embedded on it and is touchscreen!

[img]http://www.voelkner.de/products/272072/100-xl.jpg[/img]

So beautiful ;-;

[revzin]

how to workplace

[t]https://pp.vk.me/c621425/v621425558/1c7e7/d6tEHxd_JlA.jpg[/t]

[Ddrl46]

[QUOTE=nuttyboffin;47393730]My work's new scope arrived today, It's a Lecroy wavesurfer 44MXs-b. It has windows xp embedded on it and is touchscreen!

[img]http://www.voelkner.de/products/272072/100-xl.jpg[/img]

So beautiful ;-;[/QUOTE]

Nice, I hope those are more conventional to use compared to their older scopes.
Their older scopes are a pain in the arse to use, they have to do everything different to the other manufacturers just for the sake of being different...

[TCWilliamson]

[QUOTE=ddrl46;47393910]Nice, I hope those are more conventional to use compared to their older scopes.
What a pain in the arse those are to use, they have to do everything different to the other manufacturers just for the sake of being different...[/QUOTE]

I like the Leroy scopes better then other ones, they are different with good reason,
Other manufactures made their scopes more like analog scopes in terms of control. Lecroy never made analog scopes and started off by making digital capture cards, being an offspring company from CERN.

As a result they made the scopes more like a computer in terms of use. If you grew up with them, you'd find them easier.

The Lecroy scope I shown there is a blast to use, really intuitive and very powerful, great maths functions and so on. You can drag areas you want to zoom into and change their divisions separate to the other windows. It's amazing in terms of functionality.

Lecroy design their modern scopes to pretty much be a PCI output into a computer embedded or external, putting all the heavy lifting into dedicated hardware, the computer just showing the information and doing some of the lighter maths and display functionality. It's a work of art.