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/electronics/ - Electronics engineering

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File: 1424348528415.gif (210.07 KB, 1610x799, 1610:799, PCB_Case_Study1.gif)

c25d6a No.2[Reply]

Welcome to /electronics/, the board where we can discuss everything hardware.

Moderation will handle shitpost removal, corporate shilling and other attempts at ruining discussion- even though I believe in the power of self-moderation I understand that it has its limits.

This doesn’t mean that moderators will ban people if their opinions are different; we just really want to avoid repeated “look at how good this product is!” threads. It’s okay to state your opinion and start discussions, just remember to be civil.

You can use this thread to post suggestions to stickies and other constructive criticisms of the board. Some posts may be pruned from this thread as time goes on.

Update:

2015/06/04

The board is under new moderation. I have the same laissez-faire attitude. Just make sure to be excellent to each other dudes!

8 posts omitted. Click reply to view.
Post last edited at

baa21f No.199

>>119

Getting banned from pol is easy.

Get banned from any chans pol news or Christian board

Simply by saying anything at all about Jesuits, good or bad…



File: 1424371828119.jpg (33.07 KB, 180x259, 180:259, The_Art_of_Electronics.jpg)

c3e9f7 No.10[Reply]

This is the thread where students, hobbyists and experienced engineers can share literature, knowledge and advice to become better engineers, learn new skills and share ideas.

Sorry i hijacked your
"Is Horowitz and Hill's the Art of Electronics a good first text? Are there any other free resources?" thread anon, it just had some really good replies.
7 posts omitted. Click reply to view.
Post last edited at

ce8633 No.48

>>31

Thanks so much!


File: 1424352542634.jpg (340.72 KB, 1600x919, 1600:919, usb-fpga-2.13-1600.jpg)

51048b No.5[Reply]

Everything FPGA's. Post your favorite FPGA, discuss HDL languages, dev boards, projects and everything else FPGA.
10 posts and 1 image reply omitted. Click reply to view.

d1d18b No.121

>>107
>Sticking a few arm cores on the side costs basically nothing for the chip manufacturer.
Not for licensing from ARM.
>I guess maybe the FPGAs have some process differences that make it harder, but that sounds like a copout.
FPGAs are single process devices almost all of the time, they're in the range of 22nm where as MCUs from your favorite vendor are 90nm+, the number of passes to have a fully functional microprocessor and peripherals would make it as expensive as buying both(take a look at any currently available hybrids) and how a much higher yield rate.
>But then FPGAs seem to be overpriced in about every way possible
not really, you're getting 2-8x the die for something completely incomparable to an mcu, the silicon cost is the same as any CMOS process.

1f4306 No.122

File: 1428811821605.jpg (202.42 KB, 1600x1070, 160:107, $(KGrHqZ,!ooFHj)vM9EFBR98r….jpg)

So I just acquired pic related through a family friend. I have only shit-tier programming experience and a lot of time. What can I do/learn with this?

fbaa6a No.146

>>122

bamp


2f3f0c No.148

>>5

Has anyone here used xilinx vivado? Its really nice compared to xilix's old program (and some altera program I used back in college)

Only problem is it only support the newer xilinx zynq models (no spartan series support)


000000 No.232

I wrote a poem:

Here I am, staring at the Xilinx login page

It asks me a question:

"Why register?"

It has a pretty strong argument -

"Sign up for product alerts and news!"

"Join Xilinx support forums!"

"Gain access to special content!"

"Register for training and events!"

They all sound very sweet and useful

But there is another reason to register

Far more important than all the others:

I CANT FUKCING DOWNLOAD ISE WITOHUT IT

FUCK YOU



File: 1445789767246.webm (4.09 MB, 480x360, 4:3, Diy-xray-crazy.webm)

2b8b80 No.164[Reply]

I've seen this implemented on other boards and chans with a slow post rate and I thought it would be a good idea to do it here as well.

In this thread you are encouraged to post anything you want, pictures, webms, un/finished projects, questions, stories, opinions… it doesn't matters what, as long as it is remotely related to the board.

The objective is to increase the post rate to get users to come back regularly not only to check their posts, but also other users' posts, hopefully participating in other threads more often, creating a chain reaction and thus kickstarting the community, since the current post rate must be around 3-5 posts per week.

If you see this thread you must post in it.

33 posts and 32 image replies omitted. Click reply to view.

fe5b4c No.223

>>220

I regularly check out this board in case something happens


c4a1ef No.224

I would like to see an NTP type based *chan over the air. Using simple off the shelf software/hardware.


e7dda0 No.228

for past few days I have toyed with idea of making my own computer connected transciever operating on (gprs-mobile phone) 2.4 ghz frequency just for testing and playing around….

should do it but know very little of chips on market or even how to since my knowledge is pretty old

not to mention that I have no money or time

but if I make a project during one of my sleepless hours then I will be likely to inform you guys and share it

(googling schematics and parts now)


e7dda0 No.229

>>183

>I've designed a privilege checking machine

my sides

they hurt so good


13e1ae No.231

File: 1458445419613.jpg (14.52 KB, 253x395, 253:395, NOt.jpg)

Computer Scientists get out.

REEEEEEEEEEEEEEEEEEE



File: 1456057072916.jpg (62 KB, 500x500, 1:1, oem_zte_optik_tablet_v55_m….jpg)

89f812 No.226[Reply]

Now I can understand why these keep appearing in thin devices, in between stationary components.

What I can't understand is why I keep seeing these in laptop hinges and other moving parts without any sort of shielding. When these are unshielded, they'll rip if you look at them wrongly, so constantly pulling/pushing them seems like a horrible application. Is there something I'm missing here, or is this really just bad/cheap design? I don't think a thin layer of plastic would make the cable too thick to use in most places I've seen them.

457325 No.230

Are you talking about EM shielding or structural reinforcement?

If it's the latter, realize that Kapton (polyimide) is pretty fucking strong as long as it doesn't have cuts in it. Also if you look carefully you'll realize that many flat flex cables are bonded to another piece of flexible plastic for extra durability.

It's not bad design to use these cables for flexible joints. That's their design purpose. As long as they are properly strain-relieved on both ends and are protected from getting pinched they will flex and carry signals for a long time.



File: 1425436722883.jpg (69.4 KB, 735x419, 735:419, DS1102D.jpg)

6fdf9c No.110[Reply]

Is very funny that even this board looks like an electronics classroom, empty and maybe without womens.

I just wanna break the ice, asking what are you studying?
17 posts and 1 image reply omitted. Click reply to view.

c856ac No.207

Community college student here, don't know what to do with my life but I'm mildly intrigued by the electronics board. Could be a sign


213b05 No.213

3rd year CE (comp engy)

Going on work placement from jan to august currently, doing QA in an image processing company


55eb3d No.214

>>software engineering

>>inb4 not a real engineering degree

You said it right, b0ss! I just bumped into this board and i'm going to start lurking here a lot.

i'm studying power engineering at my uni in Serbia <3


ba8486 No.221

>>163

Damn fucking right TU Delft


f26edf No.227

File: 1456201832015.png (12.19 KB, 599x470, 599:470, 1348105944286.png)

Electronic Engineering in Robotics and Mechatronics.

I felt confident in my math skills and I wanted to challenge myself. I dove in blind and I'm almost done with my Associate's Degree, so if I can do it, any of you can too.



000000 No.225[Reply]

imei fix. Clearing imei on smartphones Android or apple products any software or links?


File: 1427571313937.jpg (523.29 KB, 2400x1600, 3:2, ownrfamp.jpg)

264108 No.120[Reply]

i built this rf amplifier for 10 meters. although i know all radio waves are single phase i wonder what would happen if i turned the amplifier into a 3 phase amp, i.e added a third transistor and and a third leg on each ferrite transformer, and then drove it with a three phase oscillator at 28mhz. I guess i would need a tripole instead of a dipole antenna. I know when tesla invented 3 phase ac he conceived of the idea of the rotating magnetic field. if i made this thing would it be a circularly polarised transmitter or just a heap of shit that won't work cos all radio waves are single phase?

99c433 No.152

File: 1443644303989.mp4 (41.71 KB, 244x240, 61:60, 1365711594001.mp4)

>dat soldering

I mean….


0a4e13 No.158

>>120

They would cancel and turn in to heat.


107ac5 No.217

File: 1453063917414.jpg (113.07 KB, 600x400, 3:2, manhatbuild_2.jpg)

>>152

Manhattan style tends to be messy, but yeah, it could be neater.



File: 1426508213312-0.jpg (1.36 MB, 2592x1456, 162:91, WP_20150316_002.jpg)

File: 1426508213312-1.jpg (1.04 MB, 2592x1456, 162:91, WP_20150316_004.jpg)

File: 1426508213312-2.jpg (1.3 MB, 2592x1456, 162:91, WP_20150316_005.jpg)

File: 1426508213312-3.jpg (1.32 MB, 2592x1456, 162:91, WP_20150316_009.jpg)

9c5909 No.117[Reply]

Hello /electronics/ i need some help and advice
I have an old late 50's tube radio at home
Its mine and i don't know any use of it, tried to sell it before but there was no interest.
The model is Telefunken Gavotte 9 Export

(specs. http://www.radiomuseum.org/r/telefunken_gavotte_9_export.html )

I got some money now and i saw some youtube videos of similar radios transformed into guitar amp, so i would like to do the same, but i don't have any knowledge needed to finish this project myself, i only know some college eletronics basics and have some basic soldering skills.
So my plan is to leave the radio circuits inside and use one button called Pick up button ( see pic ) to transform the radio into basic guitar amp.
It seems to me that i only have to find the circuits of that function and swap it with guitar jack and some basic elements to lead my guitar signal, but im not sure is this correct and how to do it

Btw sorry for my bad english not my native

9c5909 No.118

File: 1426508577602-0.jpg (1.27 MB, 2592x1456, 162:91, WP_20150316_007.jpg)

File: 1426508577602-1.jpg (1.41 MB, 2592x1456, 162:91, WP_20150316_006.jpg)

File: 1426508577602-2.jpg (1.29 MB, 2592x1456, 162:91, WP_20150316_008.jpg)

File: 1426508577602-3.pdf (474.37 KB, Telefunken_1063.pdf)

I don't need the eq knobs since it has two buttons ( far right ) to adjust sound type, and also i have pedals for that. I would just like nice sounding basic gitar amp so i can practice inside my room. It would be better then mine current amp ( laney lx12 ). So i really need your help how to do it, what parts i need and some advices. If you are willing to help me you can also ask me for my email, if you don't want to please ignore and hide the thread. Here are the manuals with schemes ( sadly on German =( ) and some pics of the back of the radio

970cac No.216

heh, wonder if this ever got off the ground… i hope you are somewhere in the fatherland right now jamming the funk out of this thing…. twf.



File: 1446355676019.jpg (10.62 KB, 400x300, 4:3, Webcam.jpg)

b0bfad No.172[Reply]

is there anyway to convert a USB webcam into wireless device?

acab1b No.203

>>172

You can try using a bluetooth with a usb-to-serial adapter. The output is received by another bluetooth which can either output serial data directly to the computer, or, if it can't do that, you can use another adapter.


acab1b No.204

>>172

Aaah, also, if speed is an issue, or distance, you can use a wifi module instead.


0714f5 No.206

>>203

USB devices are master / slave. OP will need a master device (computer of some sort) to make this scheme work.



File: 1448846905167.png (64.56 KB, 1099x689, 1099:689, tfw.png)

3ec52f No.202[Reply]

>tfw you get matlab ads on skype

I, for one, welcome our new ad bot overlords.

27deb2 No.205

File: 1449046444173.jpg (67.89 KB, 622x429, 622:429, 9Dbz2u4.jpg)

>tfw oscilloscope ads

>on an skype account I use to erp

>tfw typing this while on Windows

I swear I'll quit someday, just like I let go that LEADER 100 MHz Oscilloscope at 75 bucks on Craiglist due to being poor.



File: 1448566084017.jpg (93.63 KB, 720x1280, 9:16, photo_2015-11-26_19-12-54.jpg)

f85b10 No.197[Reply]

I am a total electronics noob and i need help

i need to know if it's safe to rewire the plug for my 3D printer's power supply. i got the printer a while back but it's never worked and i had no support from the creator of it (as they went bust) so i was unable to finish it

the printer: Phoenix by ez3d

f85b10 No.198

it's currently a north american plug and i'm in the UK. i tried using it with a travel converter and it blew the fuses (that's how much of a noob i am)


3d8270 No.200

File: 1448644177829.jpg (35.84 KB, 400x261, 400:261, cable_wiring_for_uk_plugs.jpg)

>>197

Sure, just desolder the old plug and solder the new one, you can take it from any other appliance you're not using anymore if you wish. Just don't flimsy wires.

When you peel of the insulation you'll see a green-yellow, a brown and a blue wire. The green-yellow is ground, connect it to the case if it was previously grounded, you can just simply cut that cable, but I recommend you to connect it for your safety.

The brown cable is the live, solder it to the power supply, probably in a pad that says "L" although it shouldn't matter if you connect it the other way around. Solder the blue cable to the remaining pad.

Make sure the connections are well made and will not touch with each other, other traces or the case.

Make a quick check by using your continuity meter between live and neutral, between neutral and ground and between live and ground. If it beeps with any of those you've done something wrong or the thing has a short somewhere.

I've seen UK plugs have usually connectors inside of them, so you might just need to cut the other plug, strip the wires and attach them to the corresponding connectors without any soldering.



File: 1447144151540.jpg (148.18 KB, 1024x768, 4:3, Matrix_Infinity_v5_05.jpg)

ab66a6 No.180[Reply]

The logo at the boot process of a gamecube/ ps2 is coming from the BIOS, correct? If I want to eliminate the ability to play games and just want to work on developing my own bios to access the hardware like a normal computer, I just need to bypass the current BIOS chip with a modchip correct? Please help me understand this.


File: 1446862848912.jpg (142.31 KB, 745x1000, 149:200, 1192582707655.jpg)

6df105 No.174[Reply]

probably a stupid question:

I know what voltage, amperage, and resistance is on paper and in theory. But what physically causes varying voltage or amperage levels? Like, what causes an increase in amps? if its more electrons, then where are the introduced from? and what increases the electric potential to increase voltage?

d401d2 No.175

File: 1446902619228-0.gif (67.34 KB, 495x497, 495:497, ohms-law-illustrated.gif)

File: 1446902619230-1.jpg (358.54 KB, 1920x1080, 16:9, crowded_world3_h.jpg)

This picture sums it up pretty well. Electrons repel each other and they always want to go to a more positive charged place, voltage is just a magnitude to define how much the electrons want to go from one place to another. Just like pipes and water pressure, there can also be a resistance, this resistance causes a variation in the voltage or "pressure" which forces the electrons through. Amperage is just the number of electrons that are passing through a wire per unit of time.

The number of electrons doesn't changes in a circuit, the thing that changes are the electrons flowing per unit of time, if the amperage has increased it's because the resistance has decreased or the voltage has increased. Voltages (or differences in the distribution of electrons) can be created in many ways, magnetism, chemical batteries, static charges… it's basically an unbalance of electrons, just like people in a crowded place tend to look for more space, electrons repel each other reaching a less "crowded" or a positively charged place to stay, they will have to go though bottlenecks (resistances) reducing the flow (current) causing a variation of pressure between people at both sides (voltage drop) as you can see in the second picture.


6df105 No.176

>>175

thanks

>Amperage is just the number of electrons that are passing through a wire per unit of time.

you know, this is what i think tripped me up. I was thinking amperage was how many electrons, not the rate in which they pass.


d401d2 No.178

>>176

If I recall correctly, an Ampere is a Coulomb (or a negative Coulomb if you prefer) per second, this is 6.241×10^18 electrons per second.



File: 1445128813810.jpg (16.62 KB, 480x360, 4:3, hqdefault.jpg)

a526cd No.159[Reply]

https://www.youtube.com/watch?v=Mno-XDP2o2c

>2,000 Farads in a credit card

thoughts?

bc7602 No.160

File: 1445224263873.webm (506.67 KB, 480x360, 4:3, a_man_can_dream.webm)

According to the video it has a capacity of 500mAh, not bad at all for a capacitor of that size and shape, but still can't compete with lithium batteries in therms or energy density (maybe it could in terms of energy per kg though), the only thing it makes them so good is they could be charged in seconds or minutes and have a much longer lifespan than the lithium batteries.

Everytime I'm hyped for something like this it turns to be a hoax, let's just hope…



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