i need to design control system that use about 14 analog sensor with arduino mega 2560 and control with labview interface for arduino . in tecnical term i think it is possible to do this. but in hardware term i want to know that it ok to do this ? or should i use daq ? i think it may have some noise or error on analog input and also when use it to long the heat on chipset may cause error or something that make problem on this.
Thank you for your assistance regarding this matter.
You need to post a link to the datasheet for the sensors you plan to use.
How many samples per second do you need to take from each sensor and from all sensors combined?
...R
i need x 4 thermocouple , x 4 pressure tranducer , load cell,flow meter,water level, and air quality sensor(optional) and also use about 4 switch and led that use digital port. i think i will use arduino mega sensor sheild v 2 to supply power and connect sensor. Thank you for your assistance regarding this matter. and quick reply
You need to post a link to the datasheet for the sensors you plan to use.
How many samples per second do you need to take from each sensor and from all sensors combined?
Digital Converter Module for K-Type Thermocouple (MAX6675) + Thermocouple Type K 0-800 C * 4 sensor
Digital Converter Module for K-Type Thermocouple (MAX6675)
MAXIM MAX6675 is an American company with a cold junction compensation, linearity correction, thermocouple break detection ADC Serial K-type thermocouple, its temperature resolution capability is 0. 25 Degree, cold junction compensation range - 20 ~ + 80 Degree, wide operating voltage range 3. 0 ~ 5. 5V
Digital Converter Module for K-Type Thermocouple (MAX6675)
Operating voltage: 3. 0 ~ 5. 5V
Internal integrated cold junction compensation circuit;
With a simple three serial interface;
Temperature signal can be converted into 12-bit digital
Temperature resolution of: 0. 25 Degree;
Cold junction compensation range: - 20 ~ + 80 Degree,
Embedded thermocouple break detection circuitry.
Using SPI 3 wire communication
K-type temperature probe
Type K temperature range 0-800 degrees
OF05ZAT High-precision Flow Sensor Meter for Water Oil Kerosene High Density Liquid G1/2
loadcell 10 kg (sparkfun)
MPX10GP *2
solenoid vale
AMT1001 AHT11 Temperature and humidity Sensors Analog voltage output
Feature:
supply voltage (Vin): DC5V ± 5%
Current Consumption: 2mA (MAX 5mA)
Operating temperature range: 0 to 60 ° C
Humidity range: 95% RH (non condensing)
Humidity measuring range: 20 to 95% RH
Storage temperature range: 0 to 60 ° C
Storage humidity range: 95% RH (non condensing)
Humidity measurement accuracy: ± 5% RH (condition: at25 °C)
The standard humidity output voltage: (conditions: at25°C), Vin = 5.0V
Relative humidity(%RH) 20 30 40 50 60 70 80
Output voltage(V) 0.6 0.9 1.2 1.5 1.8 2.1 2.4
The temperature detection characteristics: ± 5% R (25°C)) = 10Kω ± 5%
Temperature dependencies (11) (Reference): ± 5% RH (Vin = 5.00V DC ,40-80% RH,25 °C) as the reference range of,0-50°C))
Voltage dependence (12) (Reference): ± 5% RH (at25 ° C 40 - 80% RHDC5V benchmark,4.75-5 .25 V range
and other sparkfun air quality sensor (optional)
i want to use sensor that can measure like this and connect on arduino mega sensor sheild v2 and i also need some more sensor about 2-3 combine it to sensor that i give to you but i not sure exactly sensor that i choose use the sensor now.
Thank you for your assistance regarding this matter.
Hi,
Welcome to the forum.
Please read the first post in any forum entitled how to use this forum.
http://forum.arduino.cc/index.php/topic,148850.0.html
Can you tell us your electronics, programming, Arduino, hardware experience?
What is your application, what are you building?
Thanks.. Tom.. 
son1122:
Digital Converter Module for K-Type Thermocouple (MAX6675) + Thermocouple Type K 0-800 C * 4 sensor
Using SPI 3 wire communication
So that makes it a digital sensor, requiring total 7 pins (3 for the SPI bus plus four SS lines).
OF05ZAT High-precision Flow Sensor Meter for Water Oil Kerosene High Density Liquid G1/2
"output signal: pulse voltage".
Good luck with that, hope you know how to deal with it or can find a library. Connects to a digital input (I guess you can read this with pulseIn()).
loadcell 10 kg (sparkfun)
https://cdn.sparkfun.com/datasheets/Sensors/ForceFlex/TAL220M4M5Update.pdf
Appears to have an analog output, but it's a bit unclear and I'm not familiar with such sensors.
Analog - but 35 mV full scale! You may need an OpAmp to amplify this signal to closer to 0-5V full scale.
solenoid vale
https://www.sparkfun.com/products/10456
Needs a digital output, and appropriate driver circuit (MOSFET probably) with external power supply.
AMT1001 AHT11 Temperature and humidity Sensors Analog voltage output
Two analog inputs for that one maybe? Unclear.
Grand totals:
8 digital I/O
4 analog I/O
1 digital out.
I don't see the need of the sensor shield. It may make connecting a bit easier but that'd be it. You still need to build your drivers for the MPX10GP and the solenoid. Also a smaller Uno or Micro can easily connect all of this with room to spare. These sensors appear to use very little power so can be powered directly from the Arduino.
thank for reply, best regards