Digital Thermistor Thermometer

[shameelfaraz]

can i use it to measure body temperature ?

[martyfriedman666]

Haha i bet your girlfriend was thrlled! what women doesnt want a DIY thermometer! ha! looks like a cool project tho dude!

[29riteshkakkar]

Nice work, but i don't know how to use uP or PIC.....

[adamz003]

I hate your voice.

[josebachata]

hello, where can i buy these parts?

[oehrlein49]

@josebachata sparkfun or digikey

[silverpizza100]

you are learning. ITT i take it. wont be long before you work in a porn shop like my friend. But your project looks better/

[MrZuki78]

great!!!!!!

[Dilshan123321]

Fucking Physics

[francisroan]

how do we make it?

[ThePaola2005]

shut up

[chethan089]

fuckkkkkkkkkkkkkkkkkkkkkkkkkkk­kk offfffffffffffffffffffffffffff­ffff

[innakozh]

Hello! Well done! Could you please help me to write program on C for communication from PIC to 7 LED.?

[jashianne]

hey what type of thermistor did you use?

[etzenmichi]

You can also use an IC7107 .. this is much easyer and you dont have to programm anything

[prkkmusic]

Which one is the thermistor?

Is it necessary that we should use that type of IC?

What are the names of components?

What is the shcematic diagram,can you give me?

Good effort, are you engineer?

!Thanks!

[adamsone67]

Nice work -- well commented. Thanks for explaining why such a BF microcontroller (my wife would've gotten the wimpy 10-bit ADC -- maybe only 8-bit -- and learned to love it!) Did you calibrate against your specific thermistor, or just roll with the datasheets? (One of my EE profs slid me $15 to sample a calibration curve for him...)

[oehrlein49]

@adamsone67 I actually did try to calibrate for my thermistor Per my microcontoller prof's recommendation. I did this by putting it in ice water and trying to calibrate that to 0C and boiling water to 100C.

Turns out it was just way more accurate when I used the datasheet info. Figures.

[xbatusai]

I make circuits for my girlfriend too.

I made a voice vu-meter for her cosplay costume

contragulations!

[SirFelix377]

Great work. very well done.

[oehrlein49]

Thanks!

[chethan089]

shut ur assssssssssssssssssssssssss budddy

[dancdt]

Please answer my to some questions:

1. Is necessary to programme this IC

2 What is the name of this IC

3. Thank's

with respect, dan_cdt

[oehrlein49]

1) yes, you need to program the IC

2) the IC is a PIC18F4523 from microchip

3) no problem :]

[nissangaw]

hi can you help me out... i want to build the same.. but im new to electronics.. can u tell me step by step how to make it? pls pls pls

[pyrod5x5x]

schematic? i am trying to build a temperature control circuit better than the one i have for my keggerator i built and i need to learn more about circuit design to do so. any help?

[themainproblem]

Not a bad effort. Thanks for posting it.

[yhsiew999]

Why bother to use old-fashion, poor-linearity thermistors and ADC (analog to digital converter) to do temperature interface in this 21st century! Maxim has come up with a digital temperature sensing IC named DS1620. When interfaced to a PIC microcontroller, the temperature sensing IC sends streams of pulses to the PIC. Temperature can be read by interpreting the pulse-trains received in the PIC. No ADC is ever needed - be it external to or built in the PIC (such as the PIC18F4523 u used).

[oehrlein49]

Yeah, i know. I later on replaced the thermistor with a temperature sensor from analog devices. ;]

[AmnAbdulla9]

people are very interested in technology these days.

[vish12]

please could you help me out im making a similar sub system like yours for my electronics project could u tell me what resistor you have in series with the thermistor?

[oehrlein49]

You treat the thermistor just like a resistor. You can use different values of resistance. I think I used a 2K resistor with a 2K @ 25ºC thermistor. My suggestion is to read the datasheet for the thermistor for a better idea of what you might need.

[talescos]

I need to do one of those for me... can you please teach me how to do it. i am horrible at eletronics an circuits. if you could send me the sketch and the names of the components.

[appnote]

Great work, mate. I tried to make a thermometer with a thermistor as you do, but i have the problem with non linearity of it. So i used KTY resistor temp. sensor and it worked great. Can you tell me what temp sensor you used?

[oehrlein49]

I initially used a thermistor. You have to look in the datasheet for the temperature function. It's kind of a pain to make your micro do all of that extra math (natural logs and such) required for the thermistor. The temp sensor is definitely the way to go. I later replaced the thermistor with I *think* an analog devices AD22100 or something like that.

[min0577]

Your girlfriend is soooo lucky she gets circuitz

[oehrlein49]

nah, she hates em. :]

[min0577]

what a bitch.

[jesvb014]

Nice work... Did you program the PIC yourself?

If yes... What programmer you used to download the program to the PIC?

Thanx

[First2ner]

Wow very nice project, great job done

[cardjoey18]

Great work, thanks for sharing your project. What is the maximum and minimum range of your thermometer based on the thermistor?

[FutureTranX]

I'm going to write my thesis on building a similar device. The microcontroller will store thermo data and it will be possible to download data to PC with an application.

[cjunk351]

nice