Open dwblair opened 12 years ago
dwblair
commented
12 years ago Amazing development: just found out that John Resig (who wrote processing.js) has created an entire intro to computer science course at Khan Academy based around the Processing language
mbockmann
commented
12 years ago If you're looking for an inexpensive waterproof temp probe, Craig and I had worked on a library for taking temp measurements with a thermistor. The example Arduino sketch is designed for a RSBR-302J-Z50 Teflon-Coated 3k Thermistor from Redfish sensors. I was going to use it for some projects related to homebrew, but I had also thought of taking it to show my highschool chemistry teacher who may find it interesting. I've been working on plotting the data in Python... but I have some interest in learning Processing. The library I mentioned is here: https://github.com/cversek/umass-physics/tree/c9e91d67d62d72875d9acaf70caf54b9843b3a4c/teis/arduino/ThermistorLib
dwblair
commented
12 years ago Matt -- I confess to thinking this is a great suggestion, in part b/c I'd already ordered precisely of the same Thermistor from Redfish, and was planning to use it for this project :) Great to hear you were thinking of talking to your high school chem teacher -- we should plan some demos / prototypes, and then maybe do a Kickstarter all together? I will check out the python library these next few days -- I'd like to work something up in Processing because of the connection to Khan Academy, but it'd be great to have a python option in parallel ...
dwblair
commented
12 years ago Tom Igoe's serial port library: http://tigoe.net/pcomp/serial-processing.shtml
dwblair
commented
12 years ago Fix for problem with native RXTX libraries on Mac OS: http://www.sundh.com/blog/2011/05/get-processing-and-arduino-to-talk/
dwblair
commented
12 years ago The fix I'm trying for the serial port: http://www.tonyivanov.se/posts/118
dwblair
commented
12 years ago Serial issues: http://wiki.processing.org/w/Serial_Issues
dwblair
commented
12 years ago Holy cow. On Ubunut, just needed to download the latest version of Processing.
dwblair
commented
12 years ago BOOM! Working.
dwblair
commented
12 years ago Nice tutorial: http://www.processing.org/discourse/beta/num_1254511350.html
dwblair
commented
12 years ago Working demo of Processing + pressure measurement! http://www.youtube.com/watch?v=18x_vbNHqf4&feature=youtu.be
dwblair
commented
12 years ago dwblair
commented
11 years ago Cheap little USB microSD reader: http://www.amazon.com/Kingston-microSDHC-Memory-Reader-FCR-MRG2/dp/B0028R3NCU/ref=pd_cp_e_3
tacrosby
commented
11 years ago Cheap pH meter http://www.flinnsci.com/store/Scripts/prodView.asp?idproduct=17142
Not sure how useful or cost effective it is at this point but some "cheap stuff" does exist
dwblair
commented
11 years ago Great! Looking forward to taking one of these apart :)
On Wed, Nov 7, 2012 at 8:55 PM, tacrosby notifications@github.com wrote:
Cheap pH meter http://www.flinnsci.com/store/Scripts/prodView.asp?idproduct=17142
Not sure how useful or cost effective it is at this point but some "cheap stuff" does exist
— Reply to this email directly or view it on GitHubhttps://github.com/Pioneer-Valley-Open-Science/pioneer-valley-open-science.github.com/issues/8#issuecomment-10173177.
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dwblair
commented
11 years ago Nice hardware alternative to the Leonardo -- the "LeoStick" -- http://www.freetronics.com/products/leostick#.UJsp4TQaPtA
dwblair
commented
11 years ago Another neat kit from freetronics -- mobile sensing kit: http://www.freetronics.com/collections/all-products/products/mobsendat#.UJsq9zQaPtA
dwblair
commented
11 years ago // Calibration coeffs for RSBR-302J-Z50 Teflon-Coated 3k Thermistor
Thermistor firstThermistor(A,B,C,R_25C,R_STANDARD);
int pointNum;
// initialize the library with the numbers of the interface pins LiquidCrystal lcd(7,8,9,10,11,12);
void setup() { // set up the LCD's number of columns and rows: lcd.begin(16, 2); // Print a message to the LCD. //lcd.setCursor(0, 1); //lcd.print("[Recording]"); Serial1.begin(9600); // NOTE: for Leonardo, need to use "Serial1" if want to access TX and RX pins while (!Serial1) { ; // wait for serial port to connect. Needed for Leonardo only } firstThermistor.begin(tempPin); pointNum=0; }
void loop() {
double T = firstThermistor.readTemperature(); double pressureVout = (analogRead(pressurePin)/1024.)*Vin; double pressure = ((pressureVout/5.)+.04)/.004; // scaling in kPa from data sheet double P = pressure/101.325; // convert to atm
// print to the lcd lcd.setCursor(0, 0); lcd.print("# "); lcd.print(pointNum); //lcd.print(pointNum); lcd.setCursor(0,1); lcd.print(T); lcd.print(" C "); lcd.print(P); lcd.print(" Atm"); //lcd.print(T); delay(1000);
//print to USB port
Serial.print(pointNum); Serial.print(", "); Serial.print(T); Serial.print(", "); Serial.println(P);
//print to board Serial1.print(pointNum); Serial1.print(", "); Serial1.print(T); Serial1.print(", "); Serial1.println(P);
//increase pointNum pointNum=pointNum+1;
}
dwblair
commented
11 years ago Arduino Uno Ethernet: http://www.adafruit.com/products/418
and ethernet shield: http://www.adafruit.com/products/201
... both include a microSD slot!
Background
Goal: Develop a cost effective device that can simultaneously measure pressure and temperature for use with a variety of high school science labs. The device should be able to function as a stand alone measurement tool for simple measurements and/or be able to connect to a computer to output data real-time data graphically while generating a .csv file for later analysis.
Prototype v0.01
Brief description of capabilities for v0.01
Parts List v0.01 The links are ONLY SUGGESTIONS for purchasing materials and may not be ideal. The devices were wired using the manufacturer datasheets found at Digikey.
Main Components
Minor components
Software
Code v0.01 Current Arduino code for v0.01 -- (DEPRECATED)
Future updates
Resources