New Speed Contest Coming Tomorrow

New speed contest to be announced tomorrow. Hint: You don't need a hint.

Posted by fungus amungus 10 years ago

Nice Little Speed Contest Starts Today

New speed contest to start later today. More details soon.

Posted by fungus amungus 10 years ago

DC Motor speed controler

Hi all Can anyone suggest the best way to replace the variable speed trigger of a 18v battery drill, with a remote from the drill adjustable speed control. I want to control the speed and have it stay at the setting until I turn it off or adjust the speed. The drill will be clamped to a board with no battery and powered by a power supply. Thanks for any advice Les

Posted by Les1951 3 years ago

HELP making a 3 speed bike

How can i make a 3 speed gear change bike, instead of 18 gears i just want three

Posted by maccaorgordon 10 years ago

I wan't to know about the speed regulating device known as a governor.

It's also known as the centrifugal governor.It is used in vehicle engines.It's function is to limit the speed of a mechanically driven device.

Asked by ammarasheed 8 years ago

Can you speed up the video?

Can i speed up part of the video (eg, something cooking) because the thing i want to do takes 30 seconds to microwave?? please let me know :)

Posted by DELETED_JoshM96 8 years ago

OMG! It's another speed contest!

You thought we forgot about Valentine's Day. You thought wrong.Enter the Share the Love Speed Contest and win some robot chocolate.Mmm... robot chocolate.

Posted by fungus amungus 10 years ago

High speed digital video camera

I'm looking for high speed digital video camera in price about 5000$. Witch can recording movie in full HD with over 1000fps. Do you know any stores where can I buy something like this. Thanks for help, Pirotech

Posted by Pirotech 8 years ago

Speed control for a 24v to 250w wheelchair motor Answered

 Speed controller for a 24v to 250w wheelchair motor. Can anyone give me a list of parts needed to build  this also a  circuit board diagram showing where to put the components and the size of the PWM that would be required. Thanking you all again. hoplite66

Asked by hoplite66 7 years ago

New Speed Contest Up Now

Mmm...3.14159265UPDATE: The contest has launched! It's a Pie Contest. If you select all the text in this forum post you'll see the hint.

Posted by fungus amungus 9 years ago

Calculating Speed?

If you have an object with a mass of 2000 grams, and it has an average force of 635.029 kg pushing it for a distance of 6.096 meters before it becomes a free-flying projectile.  How fast is the object traveling after the 6 meters and how do you calculate it.

Asked by 5 years ago

How do I speed up my laptop?

Pentium 4, 2.66 Ghz, Compaq nx9010. I reinstall the software that came with it and it runs fast for a while and then slows down again. What am i doing wrong?

Asked by Packers Widow 8 years ago

AC motor speed controller for stereo turntable

Hello Brainiacs, I am wondering about salvaging a electric fan speed controller for my Vintage (1980's) Stereo turntable. I purchased a table from Europe and it ran on 50Hz 240v. But once I rewired the unit for 110v 60Hz it still ran too fast. It is a synchronous 24 pole motor driving a small pulley and belt system. I was told a speed controller would fix the issue by varying the voltage. True? Or if someone could come up with a schematic! ??? Any suggestions? 

Posted by bullit224 4 years ago

How to control DC motor off and on cycles.

I need to control a radio control boat,  i want to cycle the motor on and off to extend the life of the batteries 6 - 12 v 40A my feed would be a normal radio control speed controller Thanks Ian 

Asked by ian.collins.771 3 years ago

Question regarding speed electricity

Hi people! I have another thing which i do not totally understand, so as usual i have asked in one of my favourite sites! :) I always had a doubt on how "fast" is electricity. In our real world, i can observe that it is pretty fast. If i turned on a switch connected to a light bulb, i can see it turned on pretty much "instantaneously". So a question came to mind, how fast it really is? Is it near to the speed of light? So, i did some googling. According to what i have found and understood so far, it is the electric field that carries information and not the electrons themselves. And electric field travels near to the speed of light( of course, depending on the medium).  If that is the case, then from the "textbook" definition of electricity, it is the movement of electrons right? But according to what i have understood so far, electrons move pretty slowly. In DC a few millimeters per hour or so(not having the exact figure in mind, pardon me) and the average displacement in AC is zero. Then how exactly is electricity so fast? I would appreciate it if someone explains it in a simple way, both on speed and what exactly is movement of electrons. :) Update: Okay, so far my questions are answered, and it seems to take off in different directions(like science always does :D). So to stay true to the question posted here, i would like to say my doubts cleared! Many thanks to people who have answered my question, Specially Dr.Kelsey and Josehf , for the information provided! I will post other doubts in new topics.

Posted by charmquark 5 years ago

Has anyone ever invented a practical microwave-freezer? Answered

You can get water from room temperature to boiling in under a minute, but how could you get it from room temperature to freezing in about 2? Obviously I'm referring to more than just speed freezing water, could be useful for other stuff too. I was just wondering if it was even theoretically possible to make something that did this.

Asked by McDouche 9 years ago

How do you play the card game, Nerts? Answered

There's a card game called Nerts, which is highly similar to Squeal, but I can't remember the differences.

Asked by jacobz_20 6 years ago

cpu mhz help

I have an amd duron at home, but no clue how fast it runs. the only other information on it besides a cpu id is C1999 anyone know about hom many megahertz this thing runs on??

Posted by tech-king 10 years ago

i want to make a digital speedometer... What would i need to make it myself ?

I want to make my own digital speedometer for my Suzuki Gs150. I could search the market and buy one but want to make this myself since i think dere's not too much required plus i should know how to. Just for the sake of doing something to upgrade my ride. Would like to add, Any help would be great, As i am eager to learn since i have alot of projects forthcoming, doing my industrial design.

Asked by H4D1 8 years ago

Slowing a motor

I have a 4 Watt mains powered motor that currently spins at 1.6-1.9RPM. I need to find some way of slowing it to maybe 1 revolution every 10 minutes. It's all sealed in a metal case and connected to the mains by a standard plug. I really need to find a way to do this without breaking it apart stuff as it may need a safety test later, I looked at dimmer switches as they essentially limit the voltage and are a max of 300w. Like this - I realise that they are made for lights but it's a similar principle and is only about £6. Would this work? Are there other options if I don't want to break into the motor housing or wiring? Thanks.

Posted by happysnail 6 years ago

What happened to the 'speed' in Speed Contest?

Now, I know that these contests are shorter than ones like the Laser Cutter contest, and the Science Fair, but nearly 19 days long? I thought that speed contests used to be a week, no more. Is there a reason why they are extended now? Thanks, Bran E.

Posted by Bran 10 years ago

New Speed Contest: Toss It!

Show us the best paper airplane you have! Toss It! Speed Contest

Posted by fungus amungus 10 years ago

New Speed Contest Starts Tomorrow

By this time tomorrow there will be a new speed contest on the site. Raw materials for this one will be extremely easy to get, trust us.

Posted by fungus amungus 10 years ago

Airsoft speed loader gift to the dunkis!

Maybe someone could make it from pictures provided?

Posted by Katarukito 9 years ago

How can I make a really simple speed controller? Answered

I have a 100w 12V 360RPM motor and a 12V battery. I'd like to know how to make a really simple speed controller to control the speed of the motor. thanks Jack

Asked by sladek 8 years ago

New Speed Contest Announced!

You have three weeks to make an Instructable that involves LEDs. Go!

Posted by fungus amungus 10 years ago

How do I control this motor? (speed)?

I have a motor 110v 1/3 hp hz 60 phase 1rpm 1750  class B is posible

Asked by 3strada1965 5 years ago

New Speed Contest to be announced later today.

We're getting into the habit of hitting you guys with more and more speed contests. The responses that we've been getting have been great and we'd definitely like to keep it up. So expect one later today!

Posted by fungus amungus 10 years ago

ac motor speed control

My uncle recently gave me a compact, functional ac motor with an axial blower attached to it. its a pretty cool thing, and i am planning on putting it in my mac's plexi case (when its built). i have no clue how to vary the speed. from what i found on wikipedia, an inductance motor cannot have speed control. how do i know if this motor is brushed or inductive?? and if its brushed, how do i vary its speed? help!!??

Posted by tech-king 10 years ago

Cheap High-speed Camera

Yes, I know, It's an oxymoron. I've always wanted a high-speed camera, but they are way too expensive. I was wondering if any of you fellow Instructablers have a high-speed camera that you've lost interest in, and are willing to sell for a low price. Alternatively, if any of you know how to make a cheap, high quality, high-speed camera, could you post an Instructable? Edit: I bought a Casio EX-F1 a while ago, and even made an iBle about it. I also have a bunch of videos here.

Posted by Spl1nt3rC3ll 10 years ago

Best motor for speed control - ( low rpm - spin 1Lb of coffee)

I'm looking for a motor can have its speed varied, down to 1 rpm if needed and that can be done with a simple circuit. I'm building a coffee roasters. I hear that AC induction motors are hard to have their speed changed. The load will be about a pound or so and the motor will spin a cage full of beans over a heat source.  I dissasembled a bread machine and the motor is induction which I have heard is not able to be accurately speed controlled.  DC or AC?  I've seen electric drills used to spin the bean cage. What about a treadmill motor?   

Posted by fizzzbang 5 years ago

How can I reduce the speed of a sewing machine?

Is there an easy way to reduce the speed of a sewing machine?  I'm teaching a young girl to sew, and every machine just goes too fast.   I don't have room for a traditional treadle, but something foot driven would be great.  I need something easy, compact and portable.  At least one machine has an external motor = an external belt.  Any ideas?

Asked by mole1 4 years ago

I am Getting Insanely pathetic Speeds When i download something.?

I Downloaded a 4MB file,and The speed started at almost a meg per second,and very quickly dropped down to as low as 400 Bytes per second,its Was telling me i have 23 hours and 40 minutes left! I stopped the download and tried again. This Is pathetic,It loads Webpages almost instantly,I Tried Connecting to a neighbors wireless,but still,1Kb download speeds. What is going on? And You know what is even more pathetic? This Image Uploaded IN less than a Half second.

Asked by ReCreate 8 years ago

how to convert treadmill dc pulse moter to be used as variable speed moter on a bandsaw? Answered

I would like to have a variable speed  moter on a band saw or a turning lathe and i have a couple treadmill moters .Is there a way to make a power supply or buy one that will work. There's 3 wires on it -1's for a pulse from a hales sencer..

Asked by tom slick 5 years ago

Cheep High speed video camera Answered

I am a science teacher that needs a "cheep" high speed video camera for a project we do as part of our forces and motion unit.  The students build carts out of paper and straws, then race them down an incline.  I videotape them and then analyze the video and the students determine the speed of their cars. (see video here: As you can see from the video, the slow motion video is very blurry.  the frame rate is okay (they are only traveling at 2-4 meters per second, which means about 8-12cm per frame, perfect for the save we are using)., but the initial position and final position is just an estimate due to the blurry car. Maybe I am not using the right terms, I do not know a lot about film/photography, but i need the individual shots to be clearer. I currently use a Flip video camera, which is good because it is super easy to download the videos for student anaysis. What kind of camera will suit my purposes, without spending more than $400? Thanks, Covo

Asked by Covo 6 years ago

A-Jax - Speed - Web Developers

Why use slow flash when faster better ways are there? AJax is great, fast, and does the job. Here is some simple code for your site: xhr = (window.XMLHttpRequest) ? new XMLHttpRequest() : new ActiveXObject("Microsoft.xhr");"POST or GET", "PAGE-URI", 1); xhr.onreadystatechange = (function() { Code to run for the result.. }); Simple yes? My site uses the code above but within lots more Javascript hacks included. My site is My js file is minimized so to get to the code just goto and the same deal with my css file..

Posted by james.mcglashan 7 years ago

Taskings S PAB Support for OrigamiAirEnforcer's Paper Airport

Well, OrigamiAirEnforcer's Paper Airport group is just new...

Posted by wat. 6 years ago

Low Cost DC motor Controler?

I want to power a 90 Volt, 5amp Perment Brush type DC Gear Motor. The, "Variable speed controller", needs to be able to use 115v AC or 115v DC input power, which is selectable by the operator. I have used a Staco variable tranformer which uses 115v AC input and rectified the output to drive the motor. But also need the 115v DC input option.

Asked by Realdann 5 years ago

I need help!

Greetings! I have never built an electronics project like this, however, I do understand the basics of what needs to be done. We are building a car that will run on the Bonneville Salt Flats in 2010. What I am looking for is to build a device to show the difference in wheel speed between the front wheels and the drive wheels. The reasons for this is to give the pilot information on how much traction he is getting at the rear wheels. Since the engine and drive wheels are located 15 feet behind the driver, you cannot do this by ear (especially at 400+mph). The second reason is that the tires used at these speeds cost $800 each, there will be 4 drive wheels, that's $3200 worth of tires. Because of the speed, the tire treads are very, VERY thin, any spinning will destroy the tires in short order. It's not just a money thing, at 400+ getting a flat tire could be fatal. My current thought is to place wheel speed sensors at one front wheel and one drive wheel. That data will be collected and one value subtracted from the other. That difference will be presented to the pilot. I am not opposed to an LCD display or a series of lights that will indicate 5, 10,15, 20 and over 25mph difference. I am a computer programmer by trade and we are planning to integrate a PC into the car for data logging and tuning. I will have a complete CPU available managing the input and output. If we can use the PC to create an application to do this, it should not be an issue. If it is easier/better to build a chip-set to do this, we can go that route as well. I am open to any and all ideas, I have a rough idea of what needs to be done, just no knowledge of parts or processes to complete it. Thanks, Brandon.

Posted by bbarn 8 years ago

How fast is your internet ?

I just want to know please go to and post your results download: 3089 Mb/supload: 547 Kb/sISP: Cebridge Connections

Posted by de-evolution 10 years ago

What should I try taking high-speed photos of? UPDATE1Apr10

I took the two photos below last year, and I want to try a few more for a new project. My rig is simply the flash unit out of an old disposable camera, rigged up to a microswitch. For the falling coins, they landed on a tilting platform with the switch underneath, so that the first coin to hit bumped it down into the switch and fire the flash. The droplet was just by setting the faucet to drip and poking the switch manually and getting a lucky shot. I'd like suggestions for what to try photographing next. I'd prefer something that can activate the flash by simply pressing two contacts together (i.e., a switch), as I haven't had much luck building light- or sound-activated triggers. UPDATE so yeah, I totally this in before spring break and forgot to mention it. The project was a magazine cover, don't knock the radd grafics dezine skillz.

Posted by CameronSS 8 years ago

how can i solder really quickly?

I want to solder about 210 LEDs to a PCB with switches for each individual LED how can i make it not take ages? can i?

Asked by rrrmanion 7 years ago

115VAC low current fan speed controller

Greetings, I am fairly new to electronics, and have mostly worked with DC circuits so far.  I have an AC fan I want to use to make a carbon filtered ventilation fan for my soldering station.  I can do this with a DC circuit and DC fan, but when researching how to do it with an AC fan I came up with more questions than I started with... The fan I have is a Nidec TA450AC model A30122-10.  It is about 5x5x1.5 inches, and rated for 115VAC, 50/60Hz, .26/.21A.  I found data on the fan here: http:// In my research so far it seems there might be three solutions: 1> Use a TRIAC/DIAC circuit, 2> Use a MOSFET circuit or 3> Use a microcontroller/PWM circuit.  There seem to be benefits/drawbacks to each method, and I don't know which method to choose, or even if I'm headed in the right direction..  I don't know how to tell if the fan is  single-phase, triple-phase, induction...  ugh.  I am looking for an inexpensive solution I can build myself,  that performs well. Can anyone help me find the right solution for my application?  Or at least point me in the right direction? Thanks much, doval

Posted by d0val 2 years ago

Excessive heat from my l7805cv voltage regulator? Answered

Hi, I'm a newbie and I've set up a programme using an Arduino Nano to build a high speed photography project using Bluetooth  (from a guy called ZHUT on youtube).  I've used his schematic and  his App and it's almost there, but the l8705cv regulator is heating up fast (almost too hot to touch) after a few minutes( with a heatsink). I'm using a 9 volt dc adaptor, power coming out is 5 volts. The trigger threshold numbers (1023) don't come up on the app. to start the programme running, stays at zero.  I've never used a schematic before, so I think I've wired up something wrong to cause this.  Any suggestions would be really welcome, as I've spent a long time on this and I'd love to get it going. I'll send photos, hope they will help, thanks 

Asked by 0range 3 months ago

How do i slow down a toy car motor without using gears? i wanna know a simple way!!!

I'am having a to car motor and i'am planning to make a robotic arm, but i don't know how to slow it down? so how do i slow it down without using gears or any microprocessor

Asked by DELETED_zerofreak 8 years ago

Using a hall effect sensor with TL494 pulse width modulator.

I have an electric billy cart with a dead controller board. I constructed the kit circuit below to replace the dead board and it works well enough for the job except for one small problem. The throttle on the billy cart utilizes a hall effect device and not a pot. The billy cart also has a handbrake with a switch that closes when applied. I use this with a resistor to discharge C2 and pull pin 4 (inhibit) high. This ensures a gentle start (as the capacitor slowly charges through the 100k resistor) if the brake is released with the throttle advanced. The output range of the throttle is 950 mV to 4.1 V if VREF (5V) is used as the supply. (I'm dropping it in in place of the pot.) 4.1 V is sufficient to achieve the maximum 90% duty cycle of the chip, but 950 mV leaves me with a minimum duty cycle of about 21%, and of course a motor that won't stop. Will changing the divider ratios 20k/2k2 & 47k/47k be sufficient to get me zero speed or am I going to have to do something more exotic? Thanks in advance.

Posted by Rasputin182 10 years ago

Tracking down the speed problems on a laptop.

I've copied the conversation here so we could remove the information from the original instructable's comments.  I figure this would also be of some interest to other forum viewers who may have similar problems, or may be able to chip in. The long and short of it is, 92033 (Ed) has a refurbished laptop that takes literal hours to run a YouTube video on.  I suspect that it's due to a bottleneck with his internet connection.  Here's the conversation thus far: ---------------------------------------------------------------- 92033 (Ed): Thank you kindly for your prompt reply...appreciate it very much. I came across this site by accident in searching for something else and now I'm 'hooked' on it. :) So far I've read over 400 archived posts (whew) well as looking at the videos. The videos are somewhat of a problem because this new laptop only has 512 mg memory...LOOOOOng time to load. For watch a SLOW 5-minute You Tube video takes 5-1/2 HOURS to load...keeps showing a couple words at a time...need to get two new memory chips to upgrade to 2gb. Thanks again...Take care. ---------------------------------------------------------------- eddems: I think you're basic download speed is killing ya, not the laptop. check you're speed at, if you see the link near the bottom for the old test, run it, I like it's graph of upload and download speed much better. ---------------------------------------------------------------- 92033: Thanks much. I'll check it out. I ordered a 1gb SDRAM Memory chip which just arrived yesterday. Hope this speeds things up a bit. ---------------------------------------------------------------- harley_rly: i hear u man, my computer is hopped up, but i live out in the sticks and have dialup...i only get 24kbps at most :( ---------------------------------------------------------------- 92033: Maybe there's hope for 'us' yet. :-) I phoned Tiger Direct to see cost of an upgrading memory chip to go from 512mg to 1-1/2gb. The guy I talked to suggested I get "PC TUNEUP 2.0" which bypasses the Windows Operating System (I'm using Windows XP Pro) and speeds up the system. I gave it a try and ordered the CD (cost $39.98 - $44.77 postpaid). It hasn't arrived yet but will let you know if it helps as he claims it will. He said that if I just ordered a 1gb memory chip my system wouldn't notice much improvement as it is, but this CD should do the trick. THEN...when I DO order the Memory chip(s) to get total of 2gb my system should zip through like a rocket with the CD just ordered. I'll let you know when I get the CD and about the results. Just hope I haven't thrown forty-five bucks to the wind. Thanks for the contact...appreciate hearing from you. TAKE CARE. ~ ED ---------------------------------------------------------------- Javin007: PC Tune-Up "bypasses the Windows Operating System?" This guy fed you a load of crap. (I work on computers for a living.) PC Tune-Up does nothing more than clean up registries, defragment harddrives (if your OS even needs it, some don't) and keeps drivers up to date (which you could do manually.) That guy's an idiot, or just a liar. Could be both. Unless you were buying PC Tuneup 2.0 from Tiger Direct, in which case we can add "sleazy salesman" to that. What are the specs of the laptop? Go to Start/Run and type in DXDIAG. This will give you a quick snapshot of the specs. Specifically, I'm curious as to the processor speed/type. For a 5 1/2 hour "load" you're more likely looking at network slowdown issues (although 512 megs for XP is WAYYYY too little. I HATE when they put PCs together like that). The RAM upgrade will show significant speed increases, but no improvement with YouTube videos or other downloads. I'm glad to see you are returning the CD. ---------------------------------------------------------------- 92033: Thanks much for your input...appreciate it very much. I checked the DXDIAG as you recommended. Here's the info on it: IBM ThinPad Laptop PC. Model # 23738TU. Intel Premium M 1.70GHZ. 512mb SDRAM Memory chip.Page File- 351mb used,513 mb available. Direct Version-Directx 9.00 (4.09.0000.0904). 512 mb SDRAM-Actual 212 Ram. AVAST Anti-Virus. MS Windows XP-PRO.. Dialup Speed-40kbps. PC2700 SDRAM 512mb Memory Chip installed. I ordered 1bb memory chip which arrived yesterday. Now I have to figure out HOW to remove the bottom of this laptop to install it...lotta small screws on it. :-) Oh, total memory shows 32mb. I don't know if this means much to you. I note your comment that the added RAM memory WONT (?) speed up loading YouTube videos? Is that correct? If so, why not? Thanks again. Take care. ~ ED ---------------------------------------------------------------- Javin007: :) At the risk of boring too many people, here's how memory in a PC works: You have two kinds of memory: RAM, and Hard Drive (technically there's three, as there's also onboard video RAM on video cards, but this is primarily used for 3D video game textures, so can be mostly ignored.) Your harddrive's read/write speed is determined by the type of harddrive it is (most are SATA now) and the rotation speed (most are 7200 RPM, though the specs for your system say yours is only 5400 RPM, but there are 10, 15, and even 20K rpm models out there that are exponentially more expensive.) No matter what, harddrive memory will always be degrees slower than RAM. RAM on the other hand is a small chunk of memory that is "temporary" memory, but very fast. Its speed is determined by the type of RAM (DDR2 being the current common one for notebooks, though DDR3 is available with some motherboards (you can ignore this, though, as you can only handle 2 gigs max of DDR with your system). The motherboard will determine the limits for the RAM that can be installed.) When running *ANYTHING* on your computer, and I mean ANYTHING, it must first be loaded into RAM to be accessed by the CPU. The computer doesn't directly access the harddrive. So this means when your operating system is loaded (Windows XP) the entirety of all running processes for the OS have to be loaded into RAM. Now, Microsoft claims that Windows XP only requires a minimum of 64 megs of RAM, but recommends 128 megs. I challenge you to find me a Windows XP system that only uses 128 megs out of the box. It's not atypical for an XP system to chew through all 512 megs of your RAM, leaving no RAM available for other applications. (Interestingly, the default setup for your laptop is only 256 megs of RAM, yet yours is reporting 512.) What happens when there's no RAM left? The system has to then start trading things into what is called "Virtual Memory." VM is nothing more than a file on the harddrive that will temporarily hold information that SHOULD be in RAM, so the RAM can load more info. For instance, say you have a process that's using RAM, but you want to watch your YouTube video. As the video is ready to play, the system will take the other process's data that's in RAM, write it to the harddrive, load your video into RAM in its place, play a portion of it, write the video to the harddrive, load the data for the process to RAM, let it run for a split second (so it doesn't lock up), write it back to the harddrive, load your video into RAM and play a short clip, etc. etc. etc. The result of low RAM on your system is that applications will open slowly (seconds or minutes, instead of instantly or a few seconds) and they will seem slow to respond, will stutter, etc. With enough RAM, your system can freely open as much as it needs into RAM, and ignore the virtual memory and all the slowdowns that it causes. Now, all of this being said, NO lack of RAM will cause a streaming video to take 5 1/2 hours to play. This is 100% going to be related to your downspeed. (Go to and post your results.) RAM slowdowns tend to be most noticeable when shutting down, or starting up your computer, apps will open a little more slowly, they will be slower to respond to button clicks, and video will be very choppy. Anything that is causing a YouTube video to take HOURS will be due to the system simply waiting to get the video in the first place. RAM wouldn't slow down the receiving of the video, but it would cause the video to play weird once it's downloaded. So, all this being said, here's the summary: Your system has a 1.7 Ghz processor, and your RAM is most likely 333 Mhz DDR. If you bump your memory up to a gig, you should see a pretty significant improvement in that your computer will, overall, just "feel" faster. It'll be more responsive, and working with large documents will be many, many times faster. This won't, however, affect your YouTube experience (unless you were getting jittery video often, not the same as "buffering" video.) If you see "buffering" for a long time, your internet connection is your bottleneck. A test on will likely confirm this. However, if you get decent numbers on SpeedTest, then we could have something more sinister going on, though I suspect you'll find your numbers well below the 1 mbps rate. This brings us to actually changing the RAM. I've been out of the PC hardware realm (professional programmer now) for a few years, and was unable to find a manual for your particular model. However, if memory serves, this image should be a fairly accurate representation of the underside of your system: Don't quote me, but I BELIEVE the red circle will indicate the only screw you will need to remove to access the RAM. There should also be a small clip holding the RAM in place that you'll want to pinch to get the RAM out, and make sure that the new RAM snaps into place. (Sometimes you'll have additional empty RAM beds, and you can just put your RAM in there and end up with 1.5 gigs, but I suspect you'll have two 256 gig chips in there.) ---------------------------------------------------------------- 92033: Phew. Thanks again for your most indepth educational lesson. I appreciate all your help more than you realize. I attempted to answer this last night, typing in more than twice the amount of text as your to me, then suddenly realized there was a glitch and I was on another page...lost it all into the ionisphere. :-( Rather than try to retype all I wrote, I shut 'r down and went to sleep. Now I'm trying to recall all I wrote last night but failed to get mailed. I'm not a traditional typist, rather a one-finger bloke so you can understand the frustration there. I do, however, type at a reasonably good speed. With that said, let's continue. I went to search for Configuration of this IBM Laptop ThinkPad 23738TU and am copy and pasting it here. It's relevant to what I have to it is: ********************************************************************************** Overview Specs Features Includes Warranty Supplies IBM ThinkPad T42 2373 Specifications Part # 23738TU Key Specifications IBM ThinkPAD T42 2373 Manufacturer IBM Manufacturer Part # 23738TU Processor Type Intel Pentium M 735 1.7 GHz Data Bus Speed 400 MHz Cache Memory Type L2 cache Installed Size 2 MB RAM Installed Size 256 MB Technology DDR SDRAM Memory Speed 333 MHz System Type Notebook Storage Hard Drive 40 GB, 5400 rpm Storage Controller Type IDE Optical Storage Type DVD ROM Read Speed 24x (CD) / 8x (DVD) Display Type 14.1" TFT active matrix Graphics Processor / Vendor ATI MOBILITY RADEON 7500 Video Memory 32 MB Max. Resolution 1024 x 768 Audio Output Type Sound card Audio Codec AD1981B Compliant Standards DirectSound, AC '97, SoundMAX Telecom Modem Fax / modem Max. Transfer Rate 56 Kbps Protocols & Specifications ITU V.90 Networking Networking Network adapter Data Link Protocol Ethernet, Fast Ethernet, Gigabit Ethernet Expansion Expansion Slots Total 1 x front accessible Expansion Slots Total 2 ( 1 ) x memory 1 ( 1 ) x CardBus - type II Interfaces 1 x docking / port replicator, 240 pin docking 2 x Hi Speed USB, 4 pin USB Type A 1 x parallel, IEEE 1284 (EPP/ECP), 25 pin D Sub (DB25) 1 x display / video, VGA, 15 pin HD D Sub (HD 15) 1 x infrared, IrDA 1 x modem, phone line, RJ11 1 x network, Ethernet 10BaseT/100BaseTX, RJ45 1 x display / video, S video output, 4 pin mini DIN 1 x microphone, input, mini phone mono 3.5 mm 1 x headphones, output, mini phone stereo 3.5 mm Miscellaneous Features Locking device keyhole (cable lock), administrator password, hard drive password, power-on password, asset ID, IBM Embedded Security Subsystem 2.0 Compliant Standards ACPI 2.0, ACPI 1.0b, FCC Class B certified, CE, MPR II, UL, BSMI, cUL, NOM, VCCI-II Operating System Microsoft Windows XP Professional Software Included Adobe Acrobat Reader, PC Doctor, IBM Rapid Restore Ultra, IBM Update Connector, InterVideo WinDVD, IBM Access Connections, IBM Access Support, Access IBM,(OEM) Battery Technology lithium ion Capacity 4400 mAh Average Run Time 5 hour(s) Installed Qty 1 Ambient Temperature Min Operating Temperature 50 °F Max Operating Temperature 90 °F Humidity Range Operating 8 - 80% Dimensions (W x D x H) Unit 12.2 in x 10 in x 1.1 in Weight Unit 4.9 lbs Warranty 3 Years Limited Warranty on parts and labor. IBM 23738TU Summary ********************************************************************************* NOTE...I DON'T BELIEVE THIS...I JUST TYPED FORTY MINUTES REPLY HERE and it instantly scrolled up like speed of lightning and disappeared like last night. I'll ATTEMP to try again later. So please don't reply yet as you need to read my discoveries in changing the RAM chip. Meanwhile, thanks again...take care. ~ ED ******************************************************************************* TRY #3...I'm Back :-) Your diagram showing where the RAM chip is located was right on. Thanks. Here's my DISCOVERY :-( The RAM chip installed was NOT a 512mg...but only a 256mg chip. The ads ans specs say it's a 512mg...NOT SO. I was lied to by either the manufacturer or refurbishing company who removed the original 512 chip and reinstalled a 256 chip. I was lied to by the Tiger Direct guy on the phone. There are NOT two chip slots...only one. So I now have a useless removed 256mb RAM chip. Replaced with the 1gb RAM chip I just installed. So instead of having 1-1/2 gb RAM, I only have 1gb. Here's the crux. To. go to 2gb RAM I'd need to buy a full 2gb RAM CHIP and discard the 1gb for which I just paid $39.99 ($45.00 with s/h). This means another output of almost a hundred dollars plus the $45.00 just wasted because they wont accept return once the sealed chip plastic was opened...even though I had no idea there was only ONE SLOT in this PC instead of TWO like the Tiger Guy said. Now...crux #2...this new 1gb RAM does nothing more to increase speed. I just watched a 2.01 MINUTE YouTube video which took a HALF HOUR to load, so I threw the money away for nothing, eh? There is no noticeable change except the 'speed' shows it now as 41.2 kbps instead of 40 kbps. HOW do I get to speed this thing up to normal viewing in real time? I also saw an ad for 4bg RAM Gateway laptop with 120gb hard drive for $404.99 which is all suped-up with everything. I had to upgrade a LOT since I got this only four months ago...taking over a hundred hours to load it, like Internet Explorer 5 to 6 and then to 8 and now to 9. I'm using AVAST Anti-Virus, after trying for 23 hours to get ADVAR, then find out it didn't load because of problem on the servor's end. Added Firefox and upgraded twice. Loaded MS Protection but it created more problems so I deleted with AVAST which I like. Soooo...I've literally spent over 200 hours to get this thng where it's at now, plus the wasted money for the upgraded RAM chip.and I still don't have increased speed. HOW do I get it? IF the processor has to be changed does this mean I have to gut the thing and install a new motherboard? If so, what kind of money cost are we talking here? I bought this four months ago as a refurbished unit only because I was able to get it on payments of only $25.00 a month. If I had to wait to get $400.00 cash I'd never have it. :-) Okay...that's it for the moment. Thanks much again for your help offering and detailed instructions...appreciate it more than you realize. Best Wishes And God's Blessings To You And Yours In Everything Always. Most Respectfully... ~ ED  ---------------------------------------------------------------- Javin007: Well, let's start with the RAM. If you're running windows XP, you can assume all the extra processes (virus scanners, and whatnot) will be eating up about 512 megs of the RAM. First thing to do is check DXDIAG again (start/run) and verify that it's now reporting the correct amount of RAM. (Don't be surprised if it's like 9 hundred something megs or slightly more. It won't report 1024 or 1 gig.) This being said, that will leave you with the other 512 for your applications. This box won't be running the latest and greatest 3D games, but I suspect it was never intended to. If the heaviest hitter you'll have running is along the lines of photoshop, the 1 gig of RAM you have now should be plenty sufficient. I wouldn't worry about getting 2 gigs. Not for this rig, anyway. Also, Avast is a great (and free) virus protection, every bit as good as Symantec's Norton, so good choice there. If your youtube videos are choking out, we need to start by verifying that it's an actual speed throttling problem. Go to and run the speed test. Come back with the results.

Posted by Javin007 7 years ago