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I was working on the #2 assignment using MySQL but I kept on getting errors so I decided to do #1 and eventually, I got datalogging to work. The picture below is the #1 assignment which is Arduino-Processing-PHP-TEXT


1. Uploaded PHP file by FTP
2. Made blank datalog.txt file and uploaded by FTP
3. Arduino-Processing-URL http://itp.nyu.edu/~yp364/datalogging/datalog.txt - get datalog

I used a Potentiameter with my Arduino to get the data.

Below is my problem with the #2 , which is Ardunio-Processing-PHP-MySQL: take a look at this error, I put the URL and I get a blank page! What is happening here?


1. Copied sample code in BBEdit and modified PHP code using my settings
2. Created database called "testDatabase_sensor" with 3 tables "value", "time", and "date".
3. Uploaded PHP file using FTP
4. tried Arduino-Processing-URL(itp.nyu.edu/~yp364/datalogging/sql_datalog.php?list =1) then got errors (blank page!)

Posted by YouJeong Paik at 12:55 AM | Permalink | Comments (0) | TrackBacks (0)

Wireless Chip (315Mhz ASK Data Receiver Module)

I chose this wireless chip because I previously purchased this when I was visiting Korea. I want to study this wireless chip and apply this to my project. Fortunately I found the data-sheet for this on the internet. This chip is used in remote controls as well as modem type of devices and it is used for data transmissions. This chip also has a remote control feature that has the ablility to turn on and off remote controlled devices. This chip can be used for controlling automatic doors and auto dimming lighting and is also modular. This chips electricty use is about 3-5Volts.

The best feautre about this chip is that it is 'Modular' so it is easy to use. however the chip itself is difficult to understand. This chip is very complicating with many feautres it offers. It has 20 pins that have different functions.

Formal Description:

The RX3310A is a fully integrated, amplitude-shift-keying (ASK) modulation, single chip receiver. It is designed to operate in a variety of low powereed radio application. All popular radio frequencies from 250MHz to 450MHz may be supported by simply choosing the appropriate external components. Particular emphasis has been placed on low current consumption.

Features:

Wide frequency range: 250 MHz to 450 Mhz
High sensitivity
Low power consumption
Automotive termperature range
High integration level requiring few and inexpensive external components
SOP 18L package or SSOP 20L (150mil) package

Applications:

Remote control systems
Car alarm and other security systems
Baby finder, wireless doorbell, wireless toys

Posted by YouJeong Paik at 02:24 AM | Permalink | Comments (0) | TrackBacks (0)

Flex Sensor





The Flex Sensor is a unique component that changes resistance when bent. An unflexed sensor has a nominal resistance of 10,000 ohms (10 K). As the flex sensor is bent the resistance gradually increases. When the sensor is bent at 90 degrees its resistance will range between 30-40 K ohms. The flex sensor may be bent greater that 360 degrees depending upon the radius of the curve. Operating temperature is -45F to 125F. The sensor measures 1/4 inch wide, 4-1/2 inches long and 0.19 inches thick.


Schematics for Flex Sensor





Reusable FlexSensors





SpO2 Reusable FlexSensors---medical purp
Nonin’s Flex Sensor System combines the convenience and performance of a disposable sensor with the economics of a reusable sensor.


SpO2 Disposable Sensors
Nonin’s Value Line and Flexi-Form® II sensors are ideal for extended monitoring or situations where the risk of cross-contamination is high.
Reusable flex sensor-- wearable,
Proven high-intensity LEDs for accuracy at critical SpO2levels
Comfortable options for spot checking, short-term and extended monitoring
Full range of sizes for all patients
Options for environments such as MRI and veterinary





Interface to a Flex sensor







http://www.tufts.edu/programs/mma/emid/projectreportsS04/kriete.html --sensor gloves
http://itp.nyu.edu/~dc788/fall2002/physcomp/keyboard_midterm.html
Keyborad Glove by Dennis Crowley





http://www.irvine-sensors.com/pdf/desnews_art_699.pdf
The EMG sensor was first protoyped in a hard printed circuit board configuration (left). A
custom ASIC on a flexible substrate is used to refine the sensor architecture (center), before
a fully flexible, silicon circuit sensor is developed.

High-flex Sensor Heads
http://www.keyence.com/products/sensors/fiberoptic/fu/fu_features_6.php


Some applications for the Flex Sensor are:

.Collision detection on mobile robots
.VR Gloves and VR suits
.Physics applications and experiments
.Bio-Metrics

Flex/Bend sensor responds to a physical range between straight and a 90 degree bend. This sensor uses the same technology as many of the glove controllers used for video consoles or computer games. It outputs a conditioned signal in the industry standard voltage range of 0.25-4.75 Volts.

http://itp.nyu.edu/physcomp/sensors/Reports/Flex by Rebecca Bray, Spring 2006
She is very organized about Flex Sensor..Take a look at what she has done.....

Flex Sensor Reaction Curve



Flex Sensor's reaction curve: Maximum bend count is 137, and minimum bend count is 35. (average)



Miltivariable Viewer Fancy



Serial Message in Arduino (simple data viewer and multi data viewer)

Posted by YouJeong Paik at 01:28 AM | Permalink | Comments (0) | TrackBacks (0)