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sorry for being such a slow one, how would u suggest me do so?
basically the ATmega is belong to the arduino(my arduino using Atmega328), I'm just using it for easy connect for now. I'd planned to use atmega cause it had ADC function in it.
However I use the MCP3002 ADC first to convert to...
hi FvM,
I finally got the value come out with thermopile is .220 something increase to .6 something if I move my hand over and to 0 V if put like a ice temperature over it.
thermistor I got stable out .2030 it does increase or decrease a bit like .2120 when hand over.
I used the same second...
:) alright. I will hook it up now and post result. Thanks FvM.
---------- Post added at 18:10 ---------- Previous post was at 16:35 ----------
hi FvM
I got them hook up and using this code to embeded to my arduino
unsigned long now;
unsigned long lastSample;
unsigned int sampleSize;
unsigned...
Thanks for replying FvM, your comments are so helpful :).
This is the first diagram that I come up with before your post 18 .
But after that, I base on your comment and post 8 to redraw it. Could you please give comment on this diagram.
I used ADC to add those to signal together in digital...
Thanks FvM.
1. So I need to have a third resistor that equal R1 // R2 on positive terminal on the thermopile ampifier?
2. The thermistor itself output is really small, as mall as the thermopile, that why I put an amplifier infront of it. Right now I still not clear on the ambient...
hey FvM, sorry for late reply. this is a general diagram that I cameup with. It's different from the old one is that I dont connect power supply to the thermistor. I wonder what I'm doing is right or not? With the ambient thermistor's output and thermopile's output., usually how much do we need...
I see. how would test it to see if the circuit is working FvM.
with the original circuit i connect the ouput (from the opamp) and the ground cable to precise multimeter. I got around .26 V as I mentioned, it's increase when I put my hand over or put some thing hot on it.
I've connect the...
wow, nice.
but would it be ok if the voltage divider's out put connect to the thermopile? I thought thermopile itself general voltage already.
On the other hand for the thermistor would I need to rotate the - and + sign? because right now the supply connect to the negative sign, or it meant to...
Thanks FvM.
I don't intend to send to anything except give the value to LCD.
Sorry for my lag of knowledge, but how would u calculate it? I read the article u send but doesn't make sense. I know that thermistor resistance of ztp135 is 100+- %3 @ 25C (77F) from the datasheet.
I might...
Thanks for you help FvM.
+ How lower would u suggest that I should use?
+ So I should use .1 uF for all of my capacitors?
The capacitor under the 200K is working at the filter already.
When you said the reference temp information from thermistor would needed to feed to the second analog...
I think the gain itself is 1000 times. However the measurement i got is temperature dependent. If I actually touched the sensor's surface it would go up to 2 something voltage though. I know that's too much offset, however I try to learn how to connect to the microcontroller so I could see the...
Hey all,
If anyone who has knowledge on this please help me out, I would really appreciate it.
I"m doing a project which make a Infrared thermometer. The requirement of the project is that I need to do everything so I could not use the awesome...
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