Temp sensor that's too cool not to share

[auraslip]

Auraslip, the display is beautiful. The possibility for dual probes monitoring both the motor temperature and controller temeprature is what I (and I guess the majoritiy of e-bikers here) really need. Yet, the temperature range is not sufficient, it goes from -10 to 60 Centigrade (I dunno how much that is in Farenheit) for one model and from -20 to 120 Centigrade ont he other. And, the X5 motor (5305) can sustain 140 degrees Centigrade with no problem if proper venting and cooling is arranged. If you could find a similar model but with a temperature range of -60 to at least +200 that would be more convenient for X5 use.

Ok guys....some one really needs to get the scalable meter I posted at the top of the thread.

It should be very simple to set it up with the proper thermocouple and scale it to the proper temp range. A whole lot simpler and easier than taking apart a motor to install a temp plug!

[auraslip]

Came today - got it installed in my latest project - the cooled battery box for the lawn care bike - I got fans in the box as well as the thermo and I'm gonna monitor the internal temp of the PING as well as the battery box. Liveforphysics strongly disagrees with this being necessary, but cycle fade does happen at higher temps and I'm curious just hot hot a battery gets on the inside. Hopefully I won't need this, but I'll be using this bike in the 100 and 10 million degrees of a texas summer!

AN IPOD??? no. a $15 thermometer

dip switches

I got a bit quick making the box because I'm in a rush to get on the road! Yes that is a 5v usb plug for charging my phone/e cigarettes.

It flashes the channel number as it switches between them.

Also it has a cool feature to switch between C and F

Hit it with a light above 60 lumens (or the sun?)


Cover it


Volia - should be interesting to see how it works in broad daylight when you move in and out of the shade

[Doctorbass]

There is some REALLY CHEAP thermometer display ( with external sensor included) on Dealextreme.com

I got them for 3$ each.. I bought 5 of them.

They can display up to 110 celsius( tested) and are really small

http://www.dealextreme.com/p/digital-compact-lcd-thermometer-with-outdoors-remote-sensor-15553






Also i found this one with smaller display and temp up to 300 celsius for 6$ shipped

http://www.dealextreme.com/p/grill-and-bbq-thermometer-50c-300c-11694





The one I use is this one:
( that include presetable alarm... REALLY USEFULL !!!)

http://www.canadiantire.ca/AST/browse/2/OutdoorLiving/BBQAccessories/GrillTopAccessories/PRD~0852086P/Stainless%252BSteel%252BDigital%252BBBQ%252BThermometer.jsp?locale=en

[El_Steak]

Doc, ifI think that the white one has an auto shut-off feature. It turns the display off after 10-15 minutes which is really annoying. I much prefer the Canadian Tire one that is always on and has a built-in alarm. Great find.

[Green Machine]

This is a really a valuable thread..thanks guys for sharing. I really hope cycle analyst adds a temperature sensor to there offerings soon.

[spinningmagnets]

This has turned into another thread that should be stickied!...

Heres another find from Beavinator costing $20, wireless with remote alarm when the set temperature is reached.

http://www.amazon.com/gp/product/B004EHYUVA/ref=olp_product_details?ie=UTF8&me=&seller=

[auraslip]

I just wrote sure electronics asking them if they can provide a dual thermometer that goes up to 200c, or if they could provide instructions on using the resalable digital display too monitor temperature.

The dual temp sensor would be great, but it might be just as easy to use 2 or more sensors with the rescalable digital display. A switch would be easiest, but some sort of system that switches automatically every 5 seconds would be great too. Imagine monitoring a motor, controller, battery, and ambient! Any thoughts on how to do this?

[auraslip]

What do you guys recommend for temp sensor wiring when the size of the axle is constrictive like in 9c hubs?

Would this work for temp sensor and hall sensors? http://hobbyking.com/hobbyking/store/uh ... duct=11850

[Arlo1]

Now we need wireless!!!

[Metallover]

With my 9c I used cat5 wires.. The thin teflon wire that connects the halls might be better tho... 36ga is pretty light so I don't know about that it almost looks like magnet wire

[auraslip]

I was thinking of bundling the halls and temp sensor wires together and heat shrinking them for security.
I dunnu, I guess I should just read the 20 page post lfp started on using 10awg wire in the 9c.

[spinningmagnets]

Arduino LM35 temp sensor info
http://pscmpf.blogspot.com/2008/12/arduino-lm35-sensor.html

From a link on this thread
http://endless-sphere.com/forums/viewtopic.php?f=28&t=22187&start=960#p434684

[auraslip]

Update on the sure temp sensor: Performed well all summer. Battery pack never got hot (above 120f), but the charger in the box sure did! Even with fans!

I'm about to install the hobby king VT temp sensor in my hub:

1) What epoxy to use? I've got some locally with a max temp rating of 150c. That's the limit for my hub as far as I'm concerned, so I'm not too worried.

2) Where do I glue the sensor? It's kinda big, and I don't want to worry about it rubbing on the cover.

3) I was thinking of installing one of these LEDS inside the hub just for fun. http://hobbyking.com/hobbyking/store/uh ... oduct=8941



They should run off 5v. I was going to epoxy it in with the sensor. If it dies, it dies. No biggie. Can I run it off the hall sensor, or the temp sensor voltage?

[amberwolf]

I doubt the 5V from the controller can supply enough current to run them. You'll probably need an external source. How much current do they take, at 5V?

[ptd]

dammit doctorbass, that's all i needed right now, another site with 60,000 cool gadgets. thanks, ya bastard. see y'all next week, lol

[spinningmagnets]

From Beavinator, stainless steel housing $16
"Taylor Digital Cooking/Roasting Thermometer"
http://www.amazon.com/gp/product/B005254TAK

[ambroseliao]

The Ikea Fantast at $6.99 is also a good thermometer for ebikers.
http://www.ikea.com/us/en/catalog/products/80100406/

I wrote about modding one on my blog.
http://ebikerider.blogspot.com/2011/09/ ... meter.html

[auraslip]

I'm still using the HK VT - http://www.hobbyking.com/hobbyking/stor ... oduct=9744

It works great. Only thing I don't like is that it cycles between temp and voltage. The alarm is loud enough and the blue LED alarm lights are a nice touch. The 150c limit hasn't been an issue because by the time the motor hits 120c, it's a boggy ride anyways. Really no point in pushing the motor harder than that.

I've found out that the sensor itself is a $1 LM35

Which opens up fun options for installing multiple sensors on the controller or battery pack. Just wire them up to a switch to change the temp sensor source.

[amberwolf]

You can find those on some motherboards, too. Sometimes three or four of them. ALso on harddisk control boards, here and there.

[neptronix]

BTW.

I picked up the first piece of crap walmart temp sensor i came across and it worked great.
Nothing special needed. Just something with a wire coming out of it

[spinningmagnets]

Here's a discussion about buying a $1 probe, and hooking it up to a CycleAnalyst

"ebikessf's 2k thermal sensor?"
http://endless-sphere.com/forums/viewtopic.php?f=2&t=38830

[cassschr1]

Bump , so I can find thread later.

[GCinDC]

I'm still using the HK VT - http://www.hobbyking.com/hobbyking/stor ... oduct=9744
...I've found out that the sensor itself is a $1 LM35

u sure about that? HK reviewersaid it was an LM37.. any diff? LM 35 also compatible w/ display?

reason i ask, i have an extra LM35 on hand and want to install in motor and then hook up to HK temp sensor. i don't want to have to wait a couple weeks for an HK sensor!

thanks!

[auraslip]

Oh... I don't know. It may be a mistake on my part.

[GCinDC]

Oh... I don't know. It may be a mistake on my part.

actually, i think it's a mistake on the reviewer's part. from more hasty searching, i can't find LM37.

lots more to supportit being an LM35...

thanks. i probably should have read JP's post from herebetter:

There are three other major types of temperature-sensing devices in common use, and I suspect that that you have one of them.

The first, which is the only device properly named a thermistor, is a variable resistor whose resistance changes with temperature, either increasing as temperture rises (PTC, or Positive Temperature Coefficient) or falling as temperature rises (NTC, or Negative Temperature Coefficient.) These devices have two wires, of which one is usually grounded and the other has a pullup voltage applied through a fixed resistance, thus forming a voltage-divider.

The second is essentially a zener diode whose reverse breakdown voltage changes with temperature. These are also two-wire devices, and are used in a similar manner to thermistors. An example of this would be the Texas Instruments LM335.

Finally, there's a class of devices which are internally similar to the above, but which contain active circuitry and output a positive voltage proportional to temperature. These are three-wire devices, and an example would be the TI LM35.