Even with that resistor, I still don't get anything from that transistor, could it be because of noise?, I'm powering this via a Computer PSU
[QUOTE=marcin1337;36106384]Even with that resistor, I still don't get anything from that transistor, could it be because of noise?, I'm powering this via a Computer PSU[/QUOTE]
Check the pinout of the transistor and if you have a multimeter with diode test mode you can test the transistor.
Audiophile gear really makes me laugh, people who buy in to this kind of stuff are total idiots and deserve to lose their money.
AC line noise has zero effect on audio quality unless the amplifier happens to be designed by a monkey with a degree in bullshit.
A good portion of that circuitry could be replaced by a simple choke on the cord :v:
Anyways, do yall have advice on picking molex connectors, I've been wading through mouser's selection but I'm hardly finding the complement parts(E.g. Finds a header that's in stock, can't find a plug to complement it)
Started with the usual filters: 2.54mm pitch, through hole, 14 pins(Atleast). Personally I'd like to have the headers bent right since I'm connecting boards that are stacked.
Closest one I found requires a minimum order of 590 units, I only need 4:
[URL="http://www.mouser.com/ProductDetail/TE-Connectivity-AMP/1-794588-1/?qs=Hi11x%252baNdgCXhUncbA7rNCBv7MI50a2QB5job8TrCCQ%3d"]http://www.mouser.com/ProductDetail/TE-Connectivity-AMP/1-794588-1/?qs=Hi11x%252baNdgCXhUncbA7rNCBv7MI50a2QB5job8TrCCQ%3d[/URL]
Audiophile targeted gear is ridiculous. Many "Audiophiles" aren't though, I've seen some excellent development work come from such communities. DIY amplifiers and such.
I've been quite lucky, most of the people I have met in the sound industry have approached this stuff obectively and scientifically and know that a power chord made from unobtainium wrapped in leather with connectors made from wishalloy isn't going to make up for the miles upon miles of cheap copper the power used to get to your home.
Wait what, Chrome is telling me Deal Extreme isn't "safe".
[QUOTE=Mr.T;36110889]Wait what, Chrome is telling me Deal Extreme isn't "safe".[/QUOTE]
Me too, either it's a fake report or there really is malware.
Seems fine to me, no porn popups yet.
[QUOTE=Chryseus;36110914]Me too, either it's a fake report or there really is malware.[/QUOTE]
I was on Deal Extreme like yesterday and it was safe. I hope there isn't any malware.
Alright scratch what I said earlier, I found a good pin strip:
[URL="http://www.mouser.com/ProductDetail/FCI/68021-416HLF/?qs=CEgdKq8q45WfpHFspPPGGP7%2fm8FtPnCVZNk9lowoU1k%3d"]http://www.mouser.com/ProductDetail/FCI/68021-416HLF/?qs=CEgdKq8q45WfpHFspPPGGP7%2fm8FtPnCVZNk9lowoU1k%3d[/URL]
Any ideas on a matching socket/plug?
[url]http://www.ebay.de/itm/5Pcs-Pitch-2-54mm-2x40-Pin-Right-Angle-Male-Double-Row-Pin-Header-Strip-/170850551703?pt=LH_DefaultDomain_0&hash=item27c77c8797[/url]
Much cheaper
Just noticed that Dealextreme isn't selling any lasers over 5 mw's, I think they became illegal...
I got one from Dealextreme which was 200mw some time ago.
This.
[img]http://luckylarry.co.uk/wp-content/uploads/2009/07/L293D.gif[/img]
When I apply Input 1 to GND, everything shorts out. What the frying fuck?
Ok, I think I have a grounding problem, I had my transistor hooked up to my 555 astable, and when I changed the Emitter of the transistor to some other ground on the ATX PSU it worked for a bit, then failed.
:(!
I accidentally bricked my ATMega16 and set it to an external RC oscillator from 8 to 12 MHz, so I took another AVR, set it to the internal 8 MHz clock, and wrote a quick assembler subroutine that just toggled all of PORTB.
The result was a square wave of roughly 3 MHz or so, and I fed it directly into the ATMega16, and changed it's fuses.
[QUOTE=HeatPipe;36116892]This.
[img]http://luckylarry.co.uk/wp-content/uploads/2009/07/L293D.gif[/img]
When I apply Input 1 to GND, everything shorts out. What the frying fuck?[/QUOTE]
L293D
Push-pull four channel driver with diodes
[url]http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/DATASHEET/CD00000059.pdf[/url]
-Snip-
Oh shit, I just broke a resistor on my laser diode, so I thought I'd solder a new one on, turns out I soldered the wrong connections or something, now when I pressed the button, the batteries heated up like so damn hot I let go of it, and then it fell and broke.
:downs:
[QUOTE=marcin1337;36117027]Ok, I think I have a grounding problem, I had my transistor hooked up to my 555 astable, and when I changed the Emitter of the transistor to some other ground on the ATX PSU it worked for a bit, then failed.
:(![/QUOTE]
Hooked up how? What sort of transistor? BJT?
The base-emitter junction is just a diode. If you don't have something to limit the current, it will explode or destroy the 555 timer.
I made a hella awesome GPS tracker that is picked up by local radio towers.
[IMG]http://kj6wmj.torba.us/img/ardutrack_open2.jpg[/IMG]
Here it is showing up on a website set up for this kind of crap.
[url]http://aprs.fi/#!mt=roadmap&z=11&call=a%2FKJ6WMJ-9&timerange=3600[/url]
Tower is 10 miles away and the transmitter uses about the same power as an xbee.
(will post more info after I build a second arduino nano version)
Finally got back to work on that capacitive discharge spot welder.
[img]http://eagle.undo.it:8083/img/cdwelder_09_startbuild_fron.jpg[/img]
[img]http://eagle.undo.it:8083/img/cdwelder_09_startbuild_insi.jpg[/img]
[img]http://eagle.undo.it:8083/img/cdwelder_09_startbuild_back.jpg[/img]
Now that all the holes are drilled and the PSU is in, I can get to putting components on the board...once I get a replacement tip for my soldering iron. I would have probably been more productive using that soldering gun today.
Neat PSU, I have one in a exactly identical case. It can output 30A at 5V.
What are the specs of yours?
Someone build me an Amblone :(
Here's a guide for yeah:
[URL="http://amblone.com/guide"]http://amblone.com/guide[/URL]
DrLuke:
I've seen that case on a random EE project put on display at my college as well. Must be the attractive price point/ease of mounting :)
The [url=http://www.mouser.com/ProductDetail/Triad-Magnetics/AWSP40-24/?qs=lk7NfA15ZfZwhqQgWUTVQA%3d%3d]PSU[/url] is rated for 1.7A at 24V.
Gonna try and make a led globe, need material to make the cylinder with though, what should I use?
[QUOTE=Night-Eagle;36132611]DrLuke:
I've seen that case on a random EE project put on display at my college as well. Must be the attractive price point/ease of mounting :)
The [url=http://www.mouser.com/ProductDetail/Triad-Magnetics/AWSP40-24/?qs=lk7NfA15ZfZwhqQgWUTVQA%3d%3d]PSU[/url] is rated for 1.7A at 24V.[/QUOTE]
As far as I know it's used in a certain slot/rack system, but I don't know it's name.
A package showed up today.
[url=http://i.imgur.com/XZRBk.jpg][img]http://i.imgur.com/XZRBkl.jpg[/img][/url]
Nice, I got the package with my breadboard and the small motor, so I can finally begin doing something with all the shit I bought, everything costed only about 40 euros.
Anyone know the better way to discharge CRT flybacks than a screwdriver with a wire attached from it to the chassis/ground and poking said screwdriver under the anode cap? Tri-tube flybacks always scare the fuck out of me.
[QUOTE=MIPS;36153163]Anyone know the better way to discharge CRT flybacks than a screwdriver with a wire attached from it to the chassis/ground and poking said screwdriver under the anode cap? Tri-tube flybacks always scare the fuck out of me.[/QUOTE]
You could try putting a resistor in series with the ground lead.
[img]http://i48.tinypic.com/1zld668.png[/img]
It's an amazing feeling to hold my own PCB in my hands :)
[editline]1st June 2012[/editline]
[img]http://i45.tinypic.com/fm2zyr.png[/img]
I hope the MOSFET-drivers can survive without a heatsink, because I just noticed that I forgot to took their size into account, as in I'd have to cut one in half.
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