[QUOTE=ddrl46;37149553]Gee DrLuke, that's like the 4th alt you've made this week.[/QUOTE]
Gosh, thanks for telling me!
[QUOTE=DiplIng.Luke;37149732]Gosh, thanks for telling me![/QUOTE]
Maybe you shouldn't get banned so you don't have to make them, just some advice.
[QUOTE=ddrl46;37149947]Maybe you shouldn't get banned so you don't have to make them, just some advice.[/QUOTE]
You really give the best advice.
Word.
Hi guys,
never posted here before but I've been following the thread for a while and, well, you've all convinced me to order a bunch of parts from China and start fiddling. I've been reading a few books while waiting for my shipment as well.
Here's my dealextreme package:
[IMG]http://i.imgur.com/hluzE.jpg[/IMG]
and then I've spent a couple days messing around with all of this stuff. I built an astable multivibrator:
[IMG]http://i.imgur.com/yOaSR.jpg[/IMG]
It works! :D I'm just not sure how yet. I'm using an old laptop as an oscilloscope so I can see the output, ~20KHz bandwith but it's free!
So yeah, hopefully this will be a bit of an adventure, and I'm looking forward to understanding what you lot are on about half the time.
Welcome to the fascinating world of electronics, and yes you got that right, it is gonna be an adventure, but hellalot of fun aswell.
Besides, nice chaps all over the thread.
[editline]10th August 2012[/editline]
Btw, can't I just make the simple combination of a coil and a capacitor to make something oscillate and make it audible on the radio? Or is there more than that?
For a good oscillator you need feed back to sustain oscillation. That's why active components(Tubes, FETs, Bipolars) are used. They provide feedback to sustain oscillation.
If you just applied a voltage to the LC tank, it'd oscillate, but the oscillation would slowly die down.
[QUOTE=ddrl46;37149553]Gee DrLuke, that's like the 4th alt you've made this week.
And subby, if you have to ask us how to make one it's probably not a good idea for you to make one.[/QUOTE]
I cant see the relevance to knowing the dangers of HV and knowing how to build a tesla coil.
Still, its good to know both
[QUOTE=LoneWolf_Recon;37161971]Still, its good to know both[/QUOTE]
Knowing the operation of the tesla coil maybe but not the maths,
[QUOTE=ddrl46;37162774][url]http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=150695403285&ss[/url]
[url]http://www.ebay.com/itm/Shakti-On-lines-Electromagnetic-Stabilizer-NEW-/160858399845?pt=US_Surge_Protectors_Power_Strips&hash=item2573e86465#ht_2596wt_1139[/url]
Oh wow.[/QUOTE]
Selling this bullshit audiophile crap to retards is a true artform "more speed, dynamics, clarity, better 3D !"
[QUOTE=SubbyV-2;37162797]Selling this bullshit audiophile crap to retards is a true artform "more speed, dynamics, clarity, better 3D !"[/QUOTE]
[URL="http://www.amazon.com/s/ref=sr_st?qid=1344588929&rh=n%3A172282%2Cp_4%3AAudioquest&sort=-price"]These guys[/URL] have mastered that art
I absolutely can't stand more of this audio shit.
Utter bullshit.
[QUOTE=Chezburger;37165920]I absolutely can't stand more of this audio shit.
Utter bullshit.[/QUOTE]
[QUOTE]As part of AudioQuest's re-examination of HDMI cable design, specific attention was paid to maximizing the [B]sonic performance of HDMI[/B]. While we've been aware of this since HDMI's introduction, AQ's Indulgence HDMI series [B]push the HDMI sonic performance to new levels[/B].
While test equipment is excellent at tracking control errors or ensuring data pass through, [B]no computer can compete with the human ear[/B] when it comes to perceiving the subtle but crucial audio errors and distortion that can reduce the enjoyment of your home theater system.[/QUOTE]
There's a reason why Equalizers were made
I was browsing the internet archive and found some very useful stuff
[url=http://archive.org/search.php?query=creator%3A%22F.E.+Bennet+%28+ed.%29%3F%22]Practical Electronics Magazines[/url]
[url=http://archive.org/details/BasicElectronicsPart3]Basic Electronics Part 3[/url]
[url=http://archive.org/details/BasicElectronicsPart4]Basic Electronics Part 4[/url]
[url=http://archive.org/details/BasicElectronicsPart5]Basic Electronics Part 5[/url]
[url=http://archive.org/details/BasicElectronicsPart6]Basic Electronics Part 6[/url]
[url=http://archive.org/details/FundamentalsOfTransistors]Fundamentals of Transistors[/url]
[url=http://archive.org/details/BasicPrinciplesOfElectronics-Vol2Semiconductors]Basic Principles of Electronics - Volume 2 Semiconductors[/url]
[url=http://archive.org/details/BasicTheoryAndApplicationOfElectronTubes]Basic Theory and Application of Electron Tubes[/url]
[url=http://archive.org/details/VacuumTubeAmplifiers]Vacuum Tube Amplifiers[/url]
[url=http://archive.org/details/VacuumTubeRectifiers]Vacuum Tube Rectifiers[/url]
[url=http://archive.org/details/RcaTubeHandbookHb-3Vol.1-2]RCA Tube Handbook HB-3[/url]
[url=http://archive.org/details/rcareceivingtube00radi]RCA Receiving Tube Manual[/url]
[url=http://archive.org/details/GettingTheMostOutOfVacuumTubes_105]Gettings the Most Out of Vacuum Tubes[/url]
[url=http://archive.org/details/CrystalOscillatorDesignTemperatureCompensation]Crystal Oscillator Design and Temperature Compensation[/url]
Much of this stuff is a lot more understandable than many modern textbooks I've read.
[QUOTE=TTSDA;37163843][URL="http://www.amazon.com/s/ref=sr_st?qid=1344588929&rh=n%3A172282%2Cp_4%3AAudioquest&sort=-price"]These guys[/URL] have mastered that art[/QUOTE]
shit can't breathe
[QUOTE=SubbyV-2;37161224]I cant see the relevance to knowing the dangers of HV and knowing how to build a tesla coil.[/QUOTE]
You want to build a spark gap tesla coil. That means that you will have a low-frequency high voltage supply to charge the capacitor and bridge the sparkgap.
That means that you need precision work and quite a bit of HV-knowledge, or your tesla coil will fail very fast, mostly around the capacitor area.
You can build your own capacitor by sandwitching aluminium foil and plastic sheets together, or create an array out of foil capacitors. Both way you'll either get breakthroughs on the capacitors, or you'll get a creeping current (is it called that in english?) where non-conducting materials suddenly will start to conduct and eventually lead to failure due to relatively low-ohm shorts.
Also RF-burns.
FUCK YEA LETS BUY TONS OF SHIT AND MAKE LIKE, THE BIGGEST TESLA COIL EVER.
About homebuilt capacitors, what will happen if I make my own variable capacitor, but not normal sized but, extra extra over kingsized aluminium sheet-format capacitors?
Recommendable ?
[editline]11th August 2012[/editline]
I always wanted to do this.
[editline]11th August 2012[/editline]
For the fun ofcourse.
[editline]11th August 2012[/editline]
Not to make some super-charged capacitor that will most certainly kill me and therefore put myself on the list of inventors killed by their own contraptions.
[editline]11th August 2012[/editline]
Although that's hell of a status.
Well, in a tesla coil you usually have the primary coil as the adjustable part.
You can't just make a bigger capacitor and expect bigger sparks. The capacitor and the primary/secondary coil and sparkgap must be in tune for maximum output. There are all kinds of calculators on the web to calculate toroid sizes/number of primary and secondary windings/capacitance........
I thought my workplace was a graveyard for the failed experiments, so I un-graveyarded it and since the funding on Chezburger labs has been stopped somewhile ago, I am gonna re-re use parts now in order to save more emone.
Cleanin' da workplace
Finished my little bench power supply.
Zero to +/-11V or zero to +22V, 250mA max, 5mV offset, 40mVpp noise @ 100Hz.
The noise seems a bit excessive and there is a rather odd 3rd harmonic at 300Hz which I'm having trouble tracing down but whatever a high pass filter should take care of it.
[img]http://i.imgur.com/sWI9a.png[/img]
[b]God damn that LED is bright[/b]
[img]http://i.imgur.com/SWCCJ.jpg[/img]
[b]The foil shield is connected to earth which pretty much eliminates 50Hz noise[/b]
[img]http://i.imgur.com/HI9AR.jpg[/img]
[b]Please don't vomit over your monitor[/b]
[img]http://i.imgur.com/aPvwL.png[/img]
Well at least it works.
Made a heatsink for my DX purchased dc-dc converter module
[t]https://dl.dropbox.com/u/59112523/EEP%20thread/2012-08-11%2022.33.38.jpg[/t]
[t]https://dl.dropbox.com/u/59112523/EEP%20thread/2012-08-11%2022.34.44.jpg[/t]
[t]https://dl.dropbox.com/u/59112523/EEP%20thread/2012-08-11%2022.35.52.jpg[/t]
Since the back is mostly groundplane I sanded off the soldermask to give me a nice big surface to attach a heatsink to. Cutouts are a bit too big but I can't be bothered to remake it.
Better too big than too small
No wonder none of my oscillator circuits have worked, after some testing I found my breadboard power rails had a fairly high resistance up to 100k in one case due to old oxidized jumpers.
Some fresh jumpers and a little wash in IPA and everything is back down to 0.1 ohm or less, so don't forget to check your breadboards regularly guys.
