Challenge Blog

Received Finisher Prize for Experimenting with Thermistors

misaz

Hello everyone. About three weeks ago I received prize for my three blogs as part of Experimenting with Thermistors. I was busy so I write about it now. I originally plan to post more blogs as part of competition, but I wrongly estimated time complex...
- 27 Nov 2022
Announcing the Winners of 'Experimenting with Thermistors'

dychen

The Experimenting with Thermistors Design Challenge, sponsored by Molex and featuring Molex thermistors, has officially wrapped. We had 10 participants with 9 finishers, including the Grand Prize Winner and Runner-up. Our judges have read each blog a...
- 11 Oct 2022
Blog #3: Inexpensive Temperature Chamber - Building the Temperature Chamber

neuromodulator

Peltier or Resistor? To change the temperature of the chamber I evaluated 2 alternatives: a Peltier module and resistor. Peltier modules are more versatile as they are heat pumps that can either heat or cool depending on the current direction. On th...
- 20 Sep 2022
Thermistors for Thermostats - Bonus Blog Post

ntewinkel

One of the backburner thoughts through this challenge was whether or not I could use a thermistor in a simple circuit to control my humming bird feeder heater.So I did a little bit of extra experimenting... Spoiler alert: it's not that simple. Here w...
- 19 Sep 2022
Blog 3: Temperature following robot

rsjawale24

This is the third project in my experimenting with thermistors blog. An interesting technology based on heat sensing is the heat seeking missile. This is where I got an idea of making a heat following robot. We have seen line following robots. They a...
- 19 Sep 2022
Blog #2: Inexpensive Temperature Chamber - Thermistor selection and temperature reading

neuromodulator

Thermistor selection As part of the design challenge I received 10 different thermistors: 213860-1637 NTC Ring Thermistor, 10 kΩ, 1% Tolerance213860-2637 NTC Ring Thermistor, 10 kΩ, 2% Tolerance213862-2637 NTC Ring Thermistor,&n...
- 19 Sep 2022
Blog 2: Analog auto-cutoff circuit using thermistor

rsjawale24

I proposed three experiments with thermistors in my first blog, this is the first one. Using a thermistor as a thermal switch for auto-cutoff/thermal protection of electrical appliances. This can help check for overheating of electrical appliances su...
- 19 Sep 2022
Thermistor Thermometer - blog 2

dougw

Intro This has been an interesting challenge, but very rough. I got ill and have not been able to bounce back.. However the challenge requires 2 blogs, so I will attempt to publish what I have accomplished so far in this second blog. The 2 applicatio...
- 19 Sep 2022
Experiments on the propagation of heat #2

redcharly

Experiments on the propagation of heat #2 Introduction Hi, I'm Carlo Russo. In this second blog, we're going to do a simple heat transfer experiment using thermistors as sensors.The experiments in this blog will be based on Fourier&#39...
- 18 Sep 2022
Where's the Heat? Blog #2

kmikemoo

First off, this Design Challenge has been a blast. I actually had to dust out the mental cobwebs and derive some equations because I hooked up my circuits differently than those on the internet examples. I truly feel less foggy-brained.&n...
- 17 Sep 2022
Blog #13: Characterising Thermistors – Pulling Out, Overload, Response Time, Building a Flow Meter & Final Conclusion

Gough Lui

With the Experimenting with Thermistors Design Challenge drawing to a close in just a few days, here comes my final blog post. In this post, I continue testing thermistors in a more destructive fashion, attempt to resolve the question of thermistor r...
- 17 Sep 2022
Blog #3 - Profiling the heat distribution in a room - Results

hitesh.boghani

Finally, I have got some results! Before we delve into the room heating results, I would like to note a few observations: Ring thermistors do not seem to be appropriate for measuring air temperature (this might be obvious to many). Compare thermiste...
- 16 Sep 2022
Hummingbird Feeder Monitoring Using Molex Thermistors - Final blog post: Bringing It All Together

ntewinkel

This is my final blog post for the Experimenting With Thermistors challenge. After experimenting with thermistors for over a month, it is time to put all of the things I’ve learned into practice: It’s time to add a thermistor to my hummin...
- 15 Sep 2022
Blog #2: Profiling the heat distribution in a room - Setup

hitesh.boghani

Let's measure some temperatures using Molex thermistors! But, where shall we begin? A thermistor is basically a resistive element whose electrical resistance changes when it is subjected to heat. So, if we can sense this change in resistance, we can ...
- 14 Sep 2022
Choosing The Right Thermistor

ntewinkel

For this Experimenting With Thermistors challenge, element14 and Molex provided us with a kit of 10 different thermistors to experiment with. After experimenting and researching for the last few months, I wondered if perhaps not all of them are ...
- 13 Sep 2022
Blog #12: Characterising Thermistors – Sticking Rings on Tabs & Sinks, Absolutely Crushing It!

Gough Lui

The last blog was a difficult one, as the experiments were long, but the reward was a set of characterisation results that seemed to match well with the datasheet information (just with an offset). But my proposal for this “experimenting-with&r...
- 11 Sep 2022
Using Multiple Thermistors

ntewinkel

This last week or so I've been experimenting with a way to read temperatures from multiple thermistors. But First... before we talk about thermistors some more, let’s hear it for the case they came in, ok? These things are often o...
- 10 Sep 2022
Blog #11: Characterising Thermistors – Show Me Your Curves

Gough Lui

In the last blog, I went off-track a little to explore the practicality of implementing a multi-thermistor acquisition system using an ESP8266 and learned quite a bit about the practicality of hacking digital I/O pins as sources, the difficulties of ...
- 3 Sep 2022
Blog #10: Characterising Thermistors – Multiple Thermistors on ESP8266

Gough Lui

In Blog 8, I mentioned some of the key difficulties in handling multiple analog signals such as those generated by thermistors and while working with the Arduino MKR WiFi 1010 to produce the results in Blog 9 was quite instructive, I felt that it wou...
- 25 Aug 2022
Side Notes - Breadboard Friendly Connections

ntewinkel

The thermistors were provided mostly with pigtail wires, and a few had special connectors that, sadly, I don't have a match for. So I decided to solder some breadboard friendly ends onto all of the thermistors in the kit, to make it easier to exp...
- 23 Aug 2022
Thermistor Easy Quick Start - Using Molex Thermistors The Easy Way.

ntewinkel

I'm Keeping It Simple Today. There is a lot of complex math and science that goes into the manufacturing of and using of thermistors, but as a humble hobbyist end-user that can get overwhelming very quickly! So my experiment today is going to be ve...
- 23 Aug 2022
Blog #9: Characterising Thermistors – Multi-T Results, Insulation R Redux, 5th Order Fits & Model Performance

Gough Lui

It’s been a few days, which means it’s time to check on the results of my multi-thermistor experiment. But before I worry about that, it would be important to revisit the anomalies around the ring thermistor resistance insulation test res...
- 20 Aug 2022
Blog #8: Characterising Thermistors – Practically Running Multiple Thermistors

Gough Lui

Being able to measure the temperature at a single point using a thermistor is great, but often we will need more than just one in a practical system. For example, an over-temperature protection and fan-speed control system may need to evaluate the te...
- 18 Aug 2022
Limited ADC on ESP8266, and possible options.

ntewinkel

TL;DR My favourite IoT board, the Wemos D1 Mini, only has ONE analog input - this limits me to using just one thermistor at a time. Read further as I look at my options. Why Wemos? The Wemos D1 Mini has WiFi built in, it’s easy to progra...
- 17 Aug 2022
Blog #7: Characterising Thermistors – Boiling, Freezing and Zapping the Truth Out of Them!

Gough Lui

By now, you’re probably bored of all the theoretical experiments and minor side-quests that have been covered in the six blogs to date. At last, we come to a blog about the thing this whole project was pitched at doing which is characterising t...
- 15 Aug 2022