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GaryLazerFinz / ECE-411-Capstone-Practicum

Group 8's Practicum Repository
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Temp sensor... #5

Open GaryLazerFinz opened 6 years ago

GaryLazerFinz commented 6 years ago

We need to get some temp sensors. There are none in the EPL store. The URS store may have some on couch st and 9th. I think we might as well order the ones that fit our purpose. Can someone reseasearch temp sensors. How much are we willing to spend ? What are we trying to cool?

Xiaoqiao6 commented 6 years ago

I had seen one example use ds18b20 as the temp sensors.

bornhor2 commented 6 years ago

I think I may have a temp sensor but I'm not sure if it will work for this application. I'll look into it... if not I can purchase one online if we can't find it locally.

bornhor2 commented 6 years ago

Ok. I do have a temp sensor and an arduino board with code to print the temp every 2 seconds. Here is what the console prints out. I'm assuming this would be really similar to what would be done on the picaxe chip. arduino serial

GaryLazerFinz commented 6 years ago

Its really just syntax i suppose. Maybe we could use it to test. Do we want to use the arduino? We should order more then one thing to make it worthwhile. Here is the datasheet for the ds18b20. It costs 2.78 at digikey. Seems kinda expensive,but maybe its worth it. The NTC / PTC resistor type are much cheaper. Im not sure which is better.

DS18B20.pdf

GaryLazerFinz commented 6 years ago

What kind of temp sensor is it?

bornhor2 commented 6 years ago

https://www.sparkfun.com/products/10988 This one. Analog.

GaryLazerFinz commented 6 years ago

Here is a surface mount version. Around the same price 1.70. https://www.digikey.com/catalog/en/partgroup/tmp35-tmp36-tmp37/10726?WT.srch=1&gclid=EAIaIQobChMIrI-3jNjn1gIVgX5-Ch234wLNEAAYASAAEgL76vD_BwE

bornhor2 commented 6 years ago

Ok. I can order a few of those.

GaryLazerFinz commented 6 years ago

Lets pu together a larger order. It looks like under 8 oz is only 4 dollars shipping. Did you order some already? I started an issue to put together a larger order.

GaryLazerFinz commented 6 years ago

I would also like to consider these. https://www.digikey.com/scripts/DkSearch/dksus.dll?Detail&itemSeq=241018854&uq=636435041972559383 So tiny so cheap.

bornhor2 commented 6 years ago

That link went to the search. Can you post the part number.

GaryLazerFinz commented 6 years ago

Digikey part no

445-2550-1-ND

GaryLazerFinz commented 6 years ago

I noticed on page 133 of the ATtiny85 datasheet, there is an internal temp sensor.