Franklin Dattein

Plug it and Arduino can sense magnet!

The magnetic reed switch module is a wonderful tool for designers who would like to turn a circuit on and off based on proximity. A digital “high” value is given when approached by magnet in around 1 inch (depends on strength of the magnet)

Building interactive work is as easy as piling bricks, just plug it to our Sensor Shield with a buckled cable, and make it looks professional and neat.

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Arduino Sound Sensor Module for Sensor Shield

Original post on EBay

Example code to read data from the sensor:
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Arduino Buzzer Module for Sensor Shield

Original Ebay post.

This is a small buzzer for the Sensor Shield. It creates different noises based on the different frequency of I/O toggling. All you need to do is to plug in the buzzer module to sensor shield, and tell the function which pin you’d like to use, the frequency you want to hear, and the duration to play that frequency.

Building interactive work is as easy as piling bricks, just plug it to our Buzzer Module with a buckled cable, and make it looks professional and neat.

Example code to play melody:
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Arduino Sensor Shield V4 digital analog module & servos

This is a copy of the original post on Ebay
Arduino Sensor Shield V4.0 allows you to connect to various modules like sensors, servos, relays, buttons, potentiometers……….just plug & play.

Each functional module has buckled port with VCC, GND and Output, which has corresponding port on the Sensor Shield, connected with a plain 2.54mm dual-female cable you may start playing already. Buckled brick cables are like cement for bricks, make the connections easier, secure and more professional looking.

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Plug it and Arduino can sense your presence of object by infrared!

Original post on Ebay

The Infrared Reflectance Sensor Module carries a single infrared LED and phototransistor pair in an inexpensive, tiny module that can be mounted almost anywhere and is great for obstacle detection of robot and home alert system. The optimal sensing distance is within 50cm (20 inches).

Building interactive work is as easy as piling bricks, just plug it to our Arduino Sensor Shield with a buckled cable, and make it looks professional and neat.

The Infrared Reflectance Sensor Module simply gives a digital signal when it detects infrared reflection from a person or object, so the code is exactly as the one we would use for a pushbutton. Please be noted that, when reflection is detected, it gives a “low” value.

int ledPin = 13;       // choose pin for the LED
int inputPin = 2;      // choose input pin (for Infrared sensor)
int val = 0;           // variable for reading the pin status

void setup() {
  pinMode(ledPin, OUTPUT);   // declare LED as output
  pinMode(inputPin, INPUT);  // declare Infrared sensor as input
}

void loop(){
  val = digitalRead(inputPin);  // read input value
  if (val == HIGH) {            // check if the input is HIGH
    digitalWrite(ledPin, LOW);  // turn LED OFF
  } else {
    digitalWrite(ledPin, HIGH); // turn LED ON
  }
}








red light at the back to show presence of object 

Ever wanted to control the lights from your home computer?
Or perhaps some other appliance in the house?

This post is a copy of this Arduino Relay on Ebay. I am replicating it here because ended items on Ebay are not indexed by Google, the author’s page is written in Chinese and doesn’t contains the Source code. If you are the author and you are obset with this, please get in touch.

Appliances with high voltage and current can’t be controlled by the Arduino digital IO ports directly, we need a relay to solve this problem. The Arduino Relay module allows Arduino Sensor Shield with digital outputs to control larger loads and devices like AC or DC Motors, electromagnets, solenoids, and incandescent light bulbs.

-Featuring Omron G5LE relay-Switching capacity of 250 Vac / 5 Vdc -LED indicator display the output status of the Relay Module-Compatible with our Arduino Sensor Shield

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This is a quick tutorial about sending and receiving  SMS from/of the computer with a GSM/GPRS modem and Java.

Requirements

• A Cellphone with credit and its USB cable
• Java version of SMSLib (download of sources here)
• Apache Jakarta Commons.Net required by SMSLib
• Slf4J also required by SMSLib.

Introduction
It is possible to use a programming language to send Hayes Commands (aka AT commands) through the serial port to a cellphone modem, plugged into a PC . With these commands the cellphone can send SMS.

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Continuing in the Anemometer project, I guess I found the cheapest way to send data over the GPRS network.

The SSerial2Mobile project is a library for Arduino, to stablish a serial connection with a mobile phone.
The project web site says that they could connect with a cheap Motorola C168i.

It costs around U$27,00 plus shipping on Ebay.
I bought an used one for U$14,00 (plus U$13,00 of the shipping)

It is pretty cheap compared to the EUR$77,00 GPRS Shield for Arduino from Libelium.

In my last post about the Anemometer project I did mention that the LaCrosse station could be integrated in Arduino, but it would require a complex reverse engineering.

Looks like Jonathan Oxfer and his friend Marc Alexander have already implemented it. Check it out:

http://www.practicalarduino.com/news/id/171

I have previously discarded the option to integrate LaCrosse stations in my projet, due to its total cost. However, it is now back on the plan.
I still consider that this station is too expensive when compared to a DIY version, but the truth is that many people are currently using them. Altough, many are unhappy, due to the complex infrastructure needed to transmit data over the internet, as explained in the previous post.
By running a parallel project to integrate LaCrosse stations with Arduino, I could provide this “extensions” to these guys in a kind of partnership.
I would give them the ability to measure wind without their expensive computers and they would give me permission to use the anemometer measurements in my web-site.

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As I promised, this is the first review of an Automated Trading System (ATS).

It’s called Open Forex Platform. Although the name mentions Forex, it also works in other finacial markets. It first started as a Forex tool, changed to a more generic approach and the name remained.

Check list
- Source code: It is open source GPL V3. The overal quality of the code is good, the organization of the projects is very clear and the business logic is separated of the UI code. Unfortunately, it doesn’t have unit tests.
- Updated documentation: here are some wiki pages, but they are outdated (I wouldn’t expect anything different in a version under 1.0).  On the other hand, the Forum is active.
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