[QUOTE=DrDevil;46231468][url]http://www.aliexpress.com/item/Free-shipping-ESP8266-serial-WIFI-wireless-module-wireless-transceiver/2031529724.html[/url]
So I think I'm gonna order a handful.
Some info: [url]https://nurdspace.nl/ESP8266[/url][/QUOTE]
I have some too, currently waiting for my Chinese Mini Pros to show up so I'm twiddling my thumbs on that subject.
But that is a significant improvement datasheet wise compared to ElectroDragon's datasheet.
[QUOTE=AGMadsAG;46231421]Around 65 kr. each, which is around 10$ each. + 10$ for shipping.
They're bought from Farnell.. element14 whatever they wanna be called.[/QUOTE]
Sounds about right, STs dev stuff is dirt-cheap. There's a new Discovery board that's worth checking out, as well as the new F7 line of MCUs.
[QUOTE=AGMadsAG;46229950]So in school we had to use optical fiber or do wireless for communication. I decided to opt for optical fiber and do some bit banging across 2 MSP430's.
[img]http://dl.dropboxusercontent.com/u/100328/Facepunch/pic1%20resized.jpg[/img]
[img]http://dl.dropboxusercontent.com/u/100328/Facepunch/pic2%20resized.jpg[/img]
[img]http://dl.dropboxusercontent.com/u/100328/Facepunch/TEK0000.BMP[/img]
Quite bad report, but w/e [URL]https://www.dropbox.com/s/m0iqqawgtcpyawj/Mads Stark Optic and Wireless communication Report.pdf?dl=0[/URL][/QUOTE]
You might want to fix the end...
[quote]
It can be concluded that making your own big banging protocol can be done quite easily.
[/quote]
don't you mean bit banging? big banging sounds more like the name for a rough porno movie.
I have a new favourite part. Linear CCDs.
[url]http://www.ebay.ca/itm/251215127824[/url]
This makes everything so much easier! I don't need to do any vibration compensation or strap an optical grating to a stepper motor. Concave mirrors erry'day.
Edit: Converting from m.ebay.ca to ebay.ca has been fixed!
[QUOTE=Cakebatyr;46231793]I have a new favourite part. Linear CCDs.
[url]http://ebay.ca/itm?itemId=251215127824[/url]
This makes everything so much easier! I don't need to do any vibration compensation or strap an optical grating to a stepper motor. Concave mirrors erry'day.[/QUOTE]
What are you doing with them?
My new project is coming along very well, only thing I'm having trouble with is finding a decent attenuator.
[img]http://u.cubeupload.com/Chryseus/BNkfSJ.png[/img]
[QUOTE=nuttyboffin;46232047]What are you doing with them?[/QUOTE]
Raman photospectroscopy.
Well, photospectroscopy in general. Basically the CCD is a one dimensional sensor array, so if you defract light across the width of the sensor then you accomplish the same thing as physically moving the diffracting surface across a digital light sensor.
Makes the whole task simpler, faster and more precise due to lack of moving parts.
Those Linear CCDs sounds pretty awesome. I wouldn't mind getting one and setting up a scrolling camera.
Is a scope really worth it for someone who's just starting out in electronics? I keep thinking how one would be useful, but I also keep thinking that I can't afford to spend really any money at all right now.
[QUOTE=papkee;46239141]Is a scope really worth it for someone who's just starting out in electronics? I keep thinking how one would be useful, but I also keep thinking that I can't afford to spend really any money at all right now.[/QUOTE]
Scopes are fairly far down the line for a beginner, that said there are [URL="http://www.instructables.com/id/Use-Your-Laptop-as-Oscilloscope/?ALLSTEPS"]tutorials[/URL] abound for turning your sound card into an O-scope (Given the signal is in the audio range).
[QUOTE=papkee;46239141]Is a scope really worth it for someone who's just starting out in electronics? I keep thinking how one would be useful, but I also keep thinking that I can't afford to spend really any money at all right now.[/QUOTE]
That really depends on what kind of electronics you're doing. It took me over a year before I got my first scope, which was a 1-channel analog scope, followed by another year before I got my first digital scope (Rigol DS1052e).
I got the analog scope for free. People give those away to beginners a lot. Just ask around on bigger electronics forums and you ought to find some kind soul willing to part with an old scope.
So another random question today. Not sure if this would belong here or in Web Development.
For my senior science project I'm working on an ethernet-connected power usage monitor and building all the code and web interface myself. I've got an arduino that sends out current watts and amps in JSON format whenever a client connects to it, and want to have a web interface that grabs this data and logs it so that you can view graphs and history, etc.
I've been trying to figure out how to save the data from the arduino. With my minimal knowledge I know I can't do it via the webpage, and the arduino doesn't have enough memory to do it, so I'm stuck wondering where I'm going to save this data.
The basic plan is this:
Arduino -> local webserver (logs data & hosts webpages) -> Web interface (on any device on the network)
I've got the Arduino and the Interface both covered, but the data logging is the last big hurtle.
Thanks for any help or input.
I have an ugly-ass webapp that displays data generated from a couple of DS18B20 sensors attached to a Raspberry Pi. The code running on the Pi just dumps the values directly into a MySQL database every couple hours. The front-end web app grabs the values and (This is ugly, I'm just lazy and haven't fixed it) prints them out to a javascript array. [url]http://home.benjeffery.ca/templog[/url]
I'm not sure if an Arduino is capable of talking to MySQL directly, if it can that would be really cool. If not, then just have an intermediary application that polls the arduino, spits the results out to a database table and then goes to sleep for a bit.
using an ethernet/WiFi shield you can upload nearly everything I believe.
I'd say check out [URL="http://www.instructables.com/id/Save-data-of-temperature-and-humidity-on-MySQL-wit/"]this page[/URL], it seems quite helpfull for what you want.
My water-clear RGB LEDs arrived.
Gave the green 4mA and started seeing spots in under a second.
Went to 2mA, started seeing spots in under a second.
Went to 0.3mA, started seeing spots in about a second.
I now understand why people use a diffused coating on LEDs.
Buying this off a friend, along with 16 more of those 1700V 800A IGBTs:
[img]http://i.imgur.com/4Nj9R1g.png[/img]
Thats 6 massive hockypuck Diodes and one massive Thyristor for turning on/off the supply on a wind-turbine.
That Thyristor will be..... perfect for a coilgun :D
somehow managed to read the text on those diodes. They are:
[url=http://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CCMQFjAA&url=http%3A%2F%2Fwww05.abb.com%2Fglobal%2Fscot%2Fscot256.nsf%2Fveritydisplay%2F564d6a1cac1f50cec1256f90004bd8c1%2F%24file%2F5sda_24f2303.pdf&ei=WURAVJK9MYeM7Aa12YCwCg&usg=AFQjCNF5JvV4TrS4ZSGp6KTdhBrXeCSE-Q&sig2=xxc-uUQ5EJdJ32wtoaKQBQ&bvm=bv.77648437,d.ZGU&cad=rja]Here[/url]
[img]http://i.imgur.com/B6ItGQQ.png[/img]
Just managed to read the thyristor too:
[url=http://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CCEQFjAA&url=http%3A%2F%2Fwww05.abb.com%2Fglobal%2Fscot%2Fscot256.nsf%2Fveritydisplay%2Fd6316074725603fd83257c63004d5215%2F%24file%2F5STP_27H2801.pdf&ei=QEVAVLKwBcrUauavgvgE&usg=AFQjCNFTYO5GJ2NKZky6yj1mD_aoJjzo-A&sig2=_T8fJOpxv9XTwuIClpDi0g&bvm=bv.77648437,d.ZGU&cad=rja]Here[/url]
[img]http://i.imgur.com/x38DD8y.png[/img]
[media]http://www.youtube.com/watch?v=PC55DPXSpr4&list=UUNAAxVKWPAbaZiB90_kjDJw[/media]
Never gets old...
[QUOTE=nuttyboffin;46260612][media]http://www.youtube.com/watch?v=PC55DPXSpr4&list=UUNAAxVKWPAbaZiB90_kjDJw[/media]
Never gets old...[/QUOTE]
But how? This is a trick of video editing, right?
[QUOTE=HiddenMyst;46268154]But how? This is a trick of video editing, right?[/QUOTE]
Nope, there's circuitry inside the LEDs and on the underside of the LEDs (where the leads go in) and inside the switch, all made from stupidly tiny SMD components.
How exactly this one works I'm not sure though.
Example:
[media]http://www.youtube.com/watch?v=RkTvDjhImwo[/media]
and solution
[media]http://www.youtube.com/watch?v=mzDTZuFJYX4[/media]
Just sold my Rigol DS1052E, if you have one I suggest you sell it and get the new DS1054Z.
[QUOTE=Chryseus;46269929]Just sold my Rigol DS1052E, if you have one I suggest you sell it and get the new DS1054Z.[/QUOTE]
How much did yours go for in the end? Mine went for 240€
[QUOTE=DrDevil;46269946]How much did yours go for in the end? Mine went for 240€[/QUOTE]
£152 (€192) on ebay, I could have held out for a bit more but meh good enough.
[QUOTE=Chryseus;46270209]£152 (€192) on ebay, I could have held out for a bit more but meh good enough.[/QUOTE]
Im still offended you didn't accept my offer of £13.37 :/
I have a USB Wifi dongle (lel) that I bought for my raspberry pi.
It looks like this without the case on!
[thumb]http://i.imgur.com/kdIvZBb.jpg[/thumb]
[thumb]http://i.imgur.com/YkRFlId.jpg[/thumb]
How dangerous/risky would it be to desolder the USB port from the dongle (lolol) and run wires from it (the way it is now, if I put it in my case I have for my raspi, it JUST touches the edge of the case, leaving no room on the other side for the power lead) to the now taken off USB port. Just so I can move the dongle(again lel) to another part of the case easier?
Would I damage any of the SMD components with too high heat so close to them? (probably)
Just checking!
Also, pretend I'm basically dumb when it comes to this stuff, because I have maybe a billionth of the amount of knowlege the awesome wave on screen makey guys have
It may be more advantageous to just get a small USB patch cable with a low profile connector.
[QUOTE=LoneWolf_Recon;46277485]It may be more advantageous to just get a small USB patch cable with a low profile connector.[/QUOTE]
Agreed.
However, if you still want to remove the connector, it really shouldn't be a problem. All of the components have to withstand 240c through the SMD oven.
[QUOTE=birkett;46283987]Agreed.
However, if you still want to remove the connector, it really shouldn't be a problem. All of the components have to withstand 240c through the SMD oven.[/QUOTE]
The components are only made to withstand this heat once, and for a limited amount of time, though looking at the dongle there probably wont be any damage if he is careful
[t]http://u.cubeupload.com/Chryseus/BxRgk7.jpg[/t]
Things are not going so well, I've been trying to fix this for 3 days.
Really need a scope now. :suicide:
Been getting used to using oscilloscopes this week at school.
Stuff's pretty sweet.
Only problem is that my workspace now has an analog scope, a digital scope, a function generator, a switching-mode DC power supply, a soldering station... Running out of space.
I'm too spoiled with my tektronix right now to consider a digital scope.
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