Hey guys, I am doing a final year project which contains four sensors, two LM 35 and two HIH 4000, and i want to display results from these sensors to PC..please assits me which microcontroller is best for me
Well both the LM35 and the HIH4000* provide analog output on one wire, so you need a board which handles 4x analog inputs. Then to talk to the PC, depending on exactly how you want to do that, an Arduino serial monitor may be "elegant" enough,
So a Uno will meet that requirement. If you want to get fancy get an Ethernet shield too, and display the results on a browser.
*disclaimer: I've never used one of these, but read about it after you posted and it looks simple enough.
Edit: Sparkfun say it's "hilariously" simple
As JimboZA stated, the low-end of the Arduino line is all you need, the Uno is an inexpensive board and has USB so that you can use any serial monitor in the OS or use something like "ttempro", which I like and which has great logging capability and it is free!!!
If you wanted to go off the beaten path and do something cute, you could take this approach and have the sensor data go directly into Excel:
http://www.instructables.com/id/Arduino-Digital-and-Analog-logging-using-V-USB/
The code is downloadable and will currently read 6 analog channels and 8 digital channels. The V-USB will work with UNO, Mini Pro, Nano, or your own Arduino "boardboard" Atmega328P-PU. By taking the raw ADC inputs into Excel, you can do you math there. You can also graph!
V-USB for Arduino Uno (328) is downloaded here:
https://code.google.com/p/vusb-for-arduino/
Ray
I do project on reading multiple sensors from different room. Each room i want to record temperature and humidity level and i want this values to display directly to the PC directly when the readings changes....what is best microcontroller and sensors which i can use
I need to diplays readings from multiple sensors directly to the PC which records temperature and humidity readings from different rooms ...which sensors and software in PC is best for me and how about connections and microcontroller is best for me..any suggestions and advice
Normally you use the processing language on the PC and communicate through the vertuial serial port that the USB connection gives you.
Can you elaborate the requirements?
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how many rooms?
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length of cabling?
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or do you want wireless?
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frequency of measurements?
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accuracy of measurements?
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precision of measurements?
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want one micro controller per room?
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multiple sensors for big rooms?
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want to detect other gases like CO2/CO in the future?
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How do you connect to the PC? USB/wifi/cable?
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what is your budget? Good humidity sensors are expensive
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what is your level of knowledge (electronics/ programming)
A good starter is to monitor one room with one UNO and a DS18B20 for temperature.
Seems there are now three threads on this. In the earliest thread you actually mentioned the sensors by type already.
Only two rooms
about 10 meters, not wireless
not less that 10 secs and accuracy of +-2%RH AND +-0.2Celsius
Only 1 micro controller for all sensors
No i don't want to detect other gases and to pc is via usb
Must be not expensive and my level is just a begginer
Temperature take the DS18B20, humidity that accurate will be difficult AFAIK.
Essentially identical topics merged.