FrostyTech.com Heatsink Reviews and Analysis
> GO < Search
TOP 5 BEST Heat Sinks     SEARCH     News     Reviews    
Follow Frostytech on FacebookFrostytech News RSS FeedFollow frostytech on Twitter
° Reviews and Articles
° Breaking News
° Mfg's Index
° Top 5 Heatsinks
° Top 5 Liquid Cooling
° Top 5 Low Profile   Heatsinks

Top 5 Heatsink Charts


NoFan Computer
What's New in Heatsinks?
°  Enermax ETS-N30 Budget CPU Air Cooler Review

°  Noctua NH-U12S @ LanOC Reviews

°  Noctua NH-D15 Review

°  Corsair Hydro H75 & H105 Coolers

°  Colder Products Company LQ6 Liquid Cooling Connectors

°  Corsair's new 120mm H75


   - or - Best 5 Heatsinks?
Guide To Making Thermistors: Updated
Guide To Making Thermistors: Updated
Overall Rating:   0%
Abstract: We've had some great responses to the "How to make a thermistor out of a laptop battery". It seems there is great interest, so lets' look at a couple of points in a little more detail.

 Company link     Category     Published     Author    
FrostyTech   $$ Price It! ££ Cooling / Heatsinks   Feb 03, 2000   Max Page  


Update to: "How to make a Thermistor out of a Laptop Battery"


We've had some great responses to the "How to make a thermistor out of a laptop battery".  It seems there is great interest in the topic, so lets' look at a couple of points in a little more detail. I've had a few questions about some things so hopefully this update will clear up any fuzzy points in 'how to make a thermistor out of a laptop battery'.

1) How are multiple probes connected to the sensor?

A picture of the orange connector was shown in the original article, but I can see how this point was open to a bit of confusion. The femal connector on the left was attached to the sensor display. Various male connectors were "hooked up to the sensor when we need a reading." At the moment, what that means is if there are four thermistors within the computer, each one must be sequencially hooked up to the display sensor to determine the temperature of that particular thermistor. It's the best possible solution we could come up at the time - hooking up a little connector is a lot easier then moving the requisate thermistor all around, and possibly contaminating temperature results during a test for example.

The focus of the article was assembling the actual thermistor probe, however we are currently working on a multi-point thermistor rig that would allow several probes to be hooked up to one sensor, and enable rapid indexing. I'll be posting an article about that when its complete. Keep an eye out for it, its not too far away...
 


2) How do you insulate the thermistor?

As stated in the article; "Soldering lead wires to the thermistor, with a bit of heat shrink tubing (4' - 1/8" dia. ~$0.50) or tape to insulate the soldered joints, is about all that needs to be done."Heatshrink tubing is slid over the wires before they are soldered, and then positioned over the exposed metal after soldering is complete. Heating of the tubing material (hair drier / lighter) causes it to decrease in diameter, encasing the wire and thus insulating from possible shorts. In the image below you can see a finished thermistor after the leads have been insulated. This can also be accomplished easily with electrical tape as well. Bare leads in close proximity to a processor could be a recipe for disaster if they happen to short out a component.


3) Why spend the money on a used battery instead of getting new thermistors?

Well, there are a couple of reasons. From our position in Canada, ordering thermistors from the source we quoted it just too expensive for more then one or two. The least expensive ones are $6 US @ 1.56 exchange is about $9.36ea. not including shipping, taxes or minimum order restrictions. We currently have six thermistors  salvaged from various equipment in use. That translates into $56.16 we didn't have to fork out. We paid $6 US for the laptop battery in the test and got two thermistors for it. $3 a piece is a pretty good deal for thermistors. Also, some people may be fortunate to have an old laptop battery lying around doing nothing, or know where some are being sold off for a few dollars each, and could potentially use them. Lastly, Recycling - its good for the envirnoment too!

4) Affording the test equipment used to save a few bucks on a thermistor.

There wouldn't be much point in getting a digital multimeter just to test thermistors. If one is available, its a great way to test thermistor compatibility. If a multimeter isn't readily available there were a couple other ways we pointed out to test compatibility. 

As an aside, the point of the article is not really about what is affordable, it was intended to show an alternative to commercial avenues for getting thermistors. There are many articles out there which will tell you the exact part numbers to buy from Radio Shack in order to make your thermistor. www.bxboards.com has a really good write up if anyone doesn't feel like tackling this kinna thing.

° Next Page 

Article Contents:
 Page 1:  — Guide To Making Thermistors: Updated
 Page 2:  More Questions...

Resources
° Got Feedback?
° Mk.II Test Platform
° Where To Buy?
° Manufacturer Index
° Industry Dir.
° Cooling Projects

nPowerTek NPH-1366-140HC Heatsink Review

Dynatron G666 2U Xeon Server Heatsink Review

Dynatron G556 2U Xeon Server Heatsink Review

Dynatron G555 2U Xeon Server Heatsink Review

Dynatron G199 1U Xeon Server Heatsink Review

Cooler Master Nepton 280L Liquid Cooling System Review
...More Articles >>

 

Websites you may also like:
PCSTATS

Google Search Frostytech

Time stamped: 3:01AM, 04.17.2014



FrostyTech.com
Since June 1999

Find a Heatsink / RSS Feeds
Latest Heatsink Reviews
Top 5 Heatsinks Tested
News RSS Feed
Reviews RSS Feed


Social Media
Facebook Fan Page
Twitter
Pinterest


FrostyTech.com Info
Feedback
Contact Us / Heatsink Submissions
Submit News
Legal

Contact the Suite 66 Advertising Agency
© Copyright 1999-2014 www.frostytech.com. All Rights Reserved. Privacy policy and Terms of Use
Images © FrostyTech.com and may not be reproduced without express written permission.