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Micro-controller headstart

I don't have any book to suggest, but I can talk about how I learned... First, I did some C on the computer to get used to programming. After that, we went down to microcontrollers with assembly language. We compiled existing software of limited complexity (LED flasher, for example) and...
- PsYcHoCoW
- Post #3
- Aug 25, 2007
- Forum: Ask a Technical Professional
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Embedded webserver device

Colleague of mine bought one of these : http://www.modtronix.com/index.php?cPath=105_112 for his senior-year project. (wine cellar) It was used to remotely monitor presence of bottles, and turn on/off a light remotely. I can't get any more specific since I didn't use it myself. wtf? it's...
- PsYcHoCoW
- Post #3
- Mar 8, 2007
- Forum: Ask a Technical Professional
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time controlled rheostat

That's a nice little project if you want to do it yourself, you'll most likely end up using a device called a Triac to power the light (a Triac is like a transistor but it works with AC, which a transistor doesn't) as for keeping time, I think the easiest thing to do would be to use an...
- PsYcHoCoW
- Post #4
- Jan 8, 2007
- Forum: Ask a Technical Professional
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BIOS not finding/recognizing PCI-Express video card

Hi, my attempts at rescuing the system have been concentrated on a lower-level, I haven't attempted to update chipset drivers/Forceware because I thought it would only have an effect in Windows, and not fix the pci-e card not waking up. [the drivers that were there have been working for over...
- PsYcHoCoW
- Post #3
- Dec 31, 2006
- Forum: Computer Building
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I forgot to partition my whole drive!

Start, Run, type "compmgmt.msc /s" without the quotes. that'll bring you to the computer management screen ; in there, go to the category that deals with storage, and then disk management. From there you should be able to right click on the unpartitioned space, and partition it.
- PsYcHoCoW
- Post #2
- Dec 31, 2006
- Forum: Computer Building
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BIOS not finding/recognizing PCI-Express video card

MSI K8NGM2-FID (socket 939, geforce 6150) AMD Athlon X2 3800+ 1GB DDR400, KVR eVGA 7900GS / Asus 6800GT Enermax 450W / Antec Neopower 480W WD 300GB HD LG DVDRW It used to work fine, but one morning the monitor wouldn't turn on (light remained yellow instead of turning green and...
- PsYcHoCoW
- Thread
- Dec 31, 2006
- Replies: 2
- Forum: Computer Building
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My Maze Navigating and Predator Evading Robot

can you tell me what motor controller module you used? I'm guessing it doesn't have feedback from the motors, and it's just a PWM generator of some sort?
- PsYcHoCoW
- Post #16
- Dec 23, 2006
- Forum: Ask a Technical Professional
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My Maze Navigating and Predator Evading Robot

nice job on the movement / wall detection, the robot turns in a very fluid way. did you buy all those gp2d sensors? I seem to recall that the unit price is pretty high :o
- PsYcHoCoW
- Post #12
- Dec 21, 2006
- Forum: Ask a Technical Professional
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Analig circuit, explanation

Indeed, the potentiometer lowers or increases time required to charge the 220uF capacitor, which determines the output timing... take a look at the lm555 datasheet for more info.. http://cache.national.com/ds/LM/LM555.pdf
- PsYcHoCoW
- Post #2
- Dec 4, 2006
- Forum: Ask a Technical Professional
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Computer Making Constant Shrill, High Pitched Noise

I've seen ("heard") some PSUs that made really high-pitched noise when plugged in... didn't even have to have the computer on ; just the PSU switch on and it made a high-pitched noise...
- PsYcHoCoW
- Post #6
- Aug 17, 2006
- Forum: Computer Building
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Deferred Procedure Calls killing my system

I had a problem similar to this... I would be using my computer normally and after a few minutes of browsing the internet all of a sudden it would get VERY jerky. I couldn't tell from the task manager what process was taking up CPU, so I just killed everything that wasn't necessary and it would...
- PsYcHoCoW
- Post #6
- Aug 15, 2006
- Forum: Computer Building
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This is best learned from somone elses experience

touching the copper traces with your fingers wouldn't give you a shock as the signals are low voltage. I doubt that it would cause problems, if it does it would be because of your body's capacity... as for plugging something in the PCI slot while the computer is running : a client where I...
- PsYcHoCoW
- Post #3
- Jul 28, 2006
- Forum: Motherboards
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How to rewrite boot sector of another drive from within windowss

PTEDIT32 : http://service1.symantec.com/SUPPORT/po...04b2dfbbb88256e75007ca1e5?OpenDocument Allows you to modify the partition table... found it yesterday while trying to fix my own HD problem (partition turned from NTFS to RAW... partition table was still OK though)
- PsYcHoCoW
- Post #2
- Jul 22, 2006
- Forum: Ask a Technical Professional
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How to determine current CPU speed of Toshiba Laptop

What's wrong is that "Sisoft Sandra scores indicate that the CPU is sometimes stuck at 1/2 speed - not even matching the speed of a 1.7 Celeron", as is written in the original post, first sentence of the second paragraph.
- PsYcHoCoW
- Post #5
- Jul 9, 2006
- Forum: Laptops
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NVidia Geforce 6800 processor use issues

that's a rude welcome. :| how about "you might have better luck over the technical support forums, highly technical is something different"? it gets the point across while remaining polite
- PsYcHoCoW
- Post #9
- Jul 4, 2006
- Forum: Ask a Technical Professional
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Trivia Help Needed

I remember watching the "Get perpendicular" video from Hitachi a while ago, and I was surprised because they weren't the first to come up with this kind of hard drive. I believe Seagate first used the technique in a notebook drive (which was like 120GB or 160GB), and then in its 750GB 3.5" drive...
- PsYcHoCoW
- Post #5
- Jul 1, 2006
- Forum: Computer Building
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The speed of...

I know from my telecomms class that signals don't travel "at" the speed of light. Depending on the conductor, it can be like 90% of the speed of light, for example.
- PsYcHoCoW
- Post #6
- Jun 30, 2006
- Forum: Ask a Technical Professional
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Designing the 1/150 power supply

for one thing, the diode bridge's cooling module would be bigger than what is on current cpus :o funny thought
- PsYcHoCoW
- Post #8
- Jun 28, 2006
- Forum: Ask a Technical Professional
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How do they make CPU pins?

according to p4 6xx datasheet, there are 226 Vcc pins and 273 Vss pins... Icc(max) is 119A for an extreme edition processor at 3.73GHz ; that means 525mA per Vcc pin, if the load is spread ideally... ( ftp://download.intel.com/design/Pentium4/datashts/30638203.pdf )
- PsYcHoCoW
- Post #6
- Jun 27, 2006
- Forum: Ask a Technical Professional
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Do you keep an all-around computer and another dedicated just for gaming?

Right now I have only one comp [built for gaming a year ago], but I plan on getting a 2nd one eventually, which will have HTPC duties. I'd like it to be my file-server at the same time, but that'll depend on what hardware is available when I decide to build it.
- PsYcHoCoW
- Post #12
- Jun 16, 2006
- Forum: Computer Building
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PC case conducts electricity

are they big shocks or just static discharges, and will it happen twice in a row? (I doubt it's static electricity since it seems to happen so often, but it's not out of the question either)
- PsYcHoCoW
- Post #5
- Jun 6, 2006
- Forum: Computer Building
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CPU construction

http://www.national.com/images/pf/LM86/10130303.pdf this picture demonstrates how to use one of National Semiconductor's temperature IC to monitor a remote transistor.. http://www.thermengr.com/TB/TB-02.pdf the first paragraph explains (shortly) why/how it works I've seen an application...
- PsYcHoCoW
- Post #7
- Jun 3, 2006
- Forum: Ask a Technical Professional
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Transfer a file byte by byte to microcontroller

Have you considered transferring the file over Hyperterminal? There are protocols built-in for transferring files (Zmodem, Xmodem, Kermit)... might be the easiest thing to try out. The protocols seem documented on google, so you might be able to get something to work from that..
- PsYcHoCoW
- Post #2
- May 12, 2006
- Forum: Ask a Technical Professional
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UPS opinion

I've done some testing with an UPS equipped with AVR. When RMS voltage hit ~110V, the AVR kicks in, upping the voltage to about 135V... the AVR is just a transformer tap that has a ratio of more than 1:1. The noise and harmonic frequencies are present on both sides of the AVR (and even amplified...
- PsYcHoCoW
- Post #20
- May 7, 2006
- Forum: Computer Building
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understanding probability theory... Infinite monkey theorem

http://www.vivaria.net/experiments/notes/publication/NOTES_EN.pdf
- PsYcHoCoW
- Post #16
- May 2, 2006
- Forum: Ask a Technical Professional
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First Windows?

even if I'm studying in the field, I don't think I could give enough information since the question is quite large... I'd say take a look at http://www.old-computers.com/museum/default.asp ; it's an online "museum" of computers.. you'll see that some of the first computers had switches for...
- PsYcHoCoW
- Post #2
- Apr 25, 2006
- Forum: Ask a Technical Professional
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Any problems with a 25 ft. USB cable?

the USB specification, as you may already know, guarantees that everything will be OK up to 15ft. I think the problem with going longer than that is reflections in the wire. I have seen more than 15ft work once (with extension cords), but it might depend on the application... I'd think it would...
- PsYcHoCoW
- Post #2
- Apr 23, 2006
- Forum: Computer Building
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Downloading/watching TV shows using XP media center *WITHOUT A TV*. ?

if you bought the PC from a name brand and it came with XP MCE, I'm guessing it has a tv tuner card already... you just need to connect the PC to the cable outlet, launch the software and you'll get the same thing you would get with a TV and a video recorder. I built my brother a rig for...
- PsYcHoCoW
- Post #2
- Apr 23, 2006
- Forum: Computer Building
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Dual 12vdc rails to +/-12v?

For one thing, don't try to wire it like you'd wire batteries in series... it'd short 12v to ground With one power supply with dual rails, you'd need a negative switching regulator since the grounds are the same. It doesn't matter that there are two rails in this case...
- PsYcHoCoW
- Post #4
- Apr 19, 2006
- Forum: Ask a Technical Professional
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What were the capabilities of the Altair 8800?

Switches and LEDs can represent binary, and binary is what makes opcodes/instructions and data which are part of a program...
- PsYcHoCoW
- Post #2
- Mar 3, 2006
- Forum: Computer Building
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Asus A8N ... How many of these are there?

let's not forget these honorable mentions... A8N5X : cheaper s939 board... has dual channel memory and sata, but I guess comes with fewer goodies. A8N-VM : small microatx board running on the geforce 6100 integrated video chipset. A8N-VM CSM : another microatx board with slightly more options
- PsYcHoCoW
- Post #5
- Jan 29, 2006
- Forum: Motherboards
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FX-60 System Build with Pics

did you go SLI straight away with the video card?
- PsYcHoCoW
- Post #7
- Jan 25, 2006
- Forum: Computer Building
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How is data transmitted?

various protocols work in different ways... Some protocols (synchronous) use a clock line and a data line. Data is read on the falling or rising edge of the clock pulse. Some other protocols (asynchronous) use just a data line. Beginning with a start code, the sender keeps outputting bits...
- PsYcHoCoW
- Post #2
- Jan 22, 2006
- Forum: Ask a Technical Professional
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Antec sucks.... seriously.... don't buy at all...

I disagree. Antec rocks.
- PsYcHoCoW
- Post #3
- Oct 20, 2005
- Forum: Cases & Cooling
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Now Im Stumped

You should format too and compare.. Also, some BIOS settings can help boot time radically.
- PsYcHoCoW
- Post #2
- Oct 13, 2005
- Forum: Computer Building
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Any SLI 32x mobos?

These boards are very recent, I'd give it a few days/weeks before they're easily available in stores.
- PsYcHoCoW
- Post #2
- Oct 8, 2005
- Forum: Motherboards
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AMD Cool & Quiet Enabled

CnQ doesn't make any difference on my system... it's not any cooler, nor quieter... the fan already runs at like 1200rpm thanks to Asus' Q-Fan. It's at 40C idle...
- PsYcHoCoW
- Post #19
- Sep 10, 2005
- Forum: Computer Building
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For anyone with basic TTL knowledge

Google is useful for this... Here's a link that tells you about lots of TTL chips : http://www.cs.uiowa.edu/~jones/logicsim/man/node5.html the '06 isn't on there but it should be easy to find on google. I've gone through that... first you learn all the TTL logic chips... then you...
- PsYcHoCoW
- Post #3
- Aug 30, 2005
- Forum: CPUs and Overclocking
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Is a laser printer worth it?

I love my Lexmark E210... me and my brother bought it several years ago. It has served us well through like 4 or 5 years of school (HS/college). We've only changed the toner once ; we don't print often, but when we do print a few pages, the ink is never dry (as can be a problem with inkjets) and...
- PsYcHoCoW
- Post #12
- Aug 30, 2005
- Forum: Computer Building
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Canadian Computer Retailers

I really liked my experience with www.adpmods.ca . They sell modding stuff... cooling, lighting, etc.. Worth a look.
- PsYcHoCoW
- Post #63
- Aug 29, 2005
- Forum: Computer Building

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