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Beginners / Re: Lab Bench PSU
« Last post by PotatoBox on Today at 03:20:45 PM »
The good thing is, I could just salavge most of the parts from the atx psu i already have!
for linear? not really, not even the transformer. been there... well there are some you can salvage, like some misc resistors, wires, and the metal case (if that suits your taste)..

Linear... What does that mean?
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RF, Microwave, HAM Radio / Re: FCC rules in USA
« Last post by TheSteve on Today at 03:16:40 PM »
If it purposely jams the target then it has caused harmful interference - like it or not and even if it is your own device. I don't think you have any chance of having that approved.
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Altium Designer / Re: Altium bug pcb file
« Last post by radar_macgyver on Today at 03:13:59 PM »
Turn off DirectX rendering. I don't remember where in the preferences->PCB dialog it is, but there is (was?) an option to use GDI instead of DirectX. You lose some functionality (like transparent layers) but it will work. I used to enable it when running Altium Summer '09 (or was it Winter '08) over Remote Desktop, it would behave like you're describing ('frozen' PCB view). I haven't done this in recent years, so I don't know if the option exists any more.
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Repair / Re: Signal Burst after repair oscilloscope
« Last post by singapol on Today at 03:13:22 PM »
I think he's refering to his TDS520 scope.

http://www.eevblog.com/forum/repair/need-help-repair-tektronix-tds520b/

First I think he needs to check the voltages of the crt circuit and then adjust the focus eg. adjust until a small
dot (trace) appears and then the front panel pot (focus) as they are interactive. Hope this helps.Please refer to the service manual for instructions.
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Beginners / Re: Line follower and Logic gates simplification
« Last post by MK14 on Today at 03:10:18 PM »
Here is an example of a really simple one (line follower):

http://playwithrobots.com/simple-line-follower-robot/









You really have two sensible choices, but I fear that you will choose neither, and it may not work out as planned.

(1)...Go really simple, and stick with simple. Seriously consider ditching pure digital, and have it much more analogue, if it helps. See how others have solved this problem.

(2)...Go with a Microcontroller. It allows a simple, initial solution. With the capabilities, to continually refine and add functionality, to quickly improve it as necessary.

Attempting a complicated digital gate logic solution, worries me, as it would be much harder to change, and would have all sorts of technical limitations and issues. Digital logic is mainly 0's and 1's, but you really need more complexity to the signals (which Microcontrollers easily can do), and need to make much more complicated decisions, than seeing if something is either 0 or 1.
Great things can be done, purely digitally. But it can take immense skill, experience and education (possibly self taught), to achieve things like that.
Otherwise, FPGA's would be considered really simple.

If you really MUST have a complicated digital logic design. Perhaps consider a different type of project, better suited to a pure digital logic solution. Such as a frequency counter or digital stepper motor controller (possibly with Microstepping) or something.
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General Chat / Re: Inches or mm
« Last post by VK5RC on Today at 02:55:43 PM »
+1 blueskull,  metric is great for accuracy,  imperial great for rough measures eg "6 foot high"  and lathe work! Whitworth understood that well
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Projects, Designs, and Technical Stuff / Re: How to cut silicon wafer
« Last post by blueskull on Today at 02:53:33 PM »
Laser cutting is ruled out. The wafer to cut is a contiguous PV cell, and heat damage on active region can impact performance even quite a distance away since the cells are internally parallel connected.
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Repair / Re: Flooded electric motor and gearbox
« Last post by helius on Today at 02:49:03 PM »
http://crcindustries.com/ei/water-damage-guide.aspx has some good advice. The products they make appear to be widely used by flood recovery teams.
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Beginners / Re: See Y'all!
« Last post by EEVblog on Today at 02:47:46 PM »
Not defending the idiot OP, but this forum does have a ruder overall attitude than many other forums I've used. It's not the worst (by far), but for sure "friendly" is not the first adjective that comes to mind. Helpful, yes; warm and cuddly, no.of
Unfortunately, to make a forum "friendly" IMHO requires much heavier moderation than this one has. It requires posts being edited or deleted by moderators and users being banned for infractions of the rules.
The way I see it, "light" moderation leads to a forum for grown ups, not children. There will be a certain amount of stuff which is blunt, if not rude, and you need to have a thick skin.

Correct.

Quote
Personally, I would rather inhabit the adult world and not be forced to do the equivalent of watching children's television in case I see something that hurts my delicate sensibilities.

The later will never happen under my watch.
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heheh nice one samsung. it's nice to see some advertisement guys that have some head/balls
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