Hello friends,

Since last week I was working on migrating Rickey's World from old server to new server. During this migration there was some issue with the server license coz of which migrating to new server was not as smooth as it could be. Many of you might have noticed their missing posts, comments, chatbox messages and many of new members have lost their user logins. I tried my best to get maximum possible data i could get out of old server, But unfortunately I was not able to get last week's data (April 2nd to April 8th).

Incase you have lost your post or messages etc. Please create a new thread or repost your problems. and for those who lost their logins, Please Its a request to rejoin the website again to get new logins. We apologize for the inconvenience caused.

Keep your hopes up! and remember we are always here to help you.

Regards,
Team RW

A simple digital compass can be made using cmp03 compass sensor interfacing Arduino and output can be displayed on 16*2 lcd. Thanks to Santosh Mishra for submitting this project and making a valuable contribution.



Parts Needed
arduino board ,16*2 lcd ,cmp03 compass sensor ,general purpose pcb,wires solder iron,comb connectors etc

Arduino Board

Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It's intended for artists, designers, hobbyists, and anyone interested in creating interactive objects or environments. you can make you own Arduino Board see the links below

Make Your Own Arduino
Pinguino, PIC Based Arduino Clone
Boarduino, Solderless Breadboard Arduino Clone

Compass Sensor(cmp03)

The compass uses the Philips KMZ51 magnetic field sensor, which is sensitive enough to detect the Earths magnetic field. The output from two of them mounted at right angles to each other is used to compute the direction of the horizontal component of the Earths magnetic
field.see data sheet for detail

LCD
a general type 16*2 lcd is used

Schematic Diagram and Explanation of it

Detailed Schematic coming soon in download section

The Arduino uses 7bit I2C addresses, and our own documentation uses 8bit addresses. For example our CMPS03 is at address 0xc0, but on the Arduino you will use 0x60. The Arduino address is the same as our address, but shifted right by 1 bit. The binary of 0xC0 is 11000000, the binary of 0x60 is 01100000.
The Arduino will shift this left by 1bit and add the Read/Write bit automatically. This uses the I2C bus to connect the Arduino to the CMPS03. It reads the bearing as a two byte integer and displays the bearing as a number 0-359 on 16*2 lcd .

connection of circuit diagram is easy scl(2) and sda(3) is pulled up using 4.7 kohm resiters and scl is connected to anolog in A5 pin of arduino and sda is connected to anologue in A4 of arduino.LCD
connections are 4,6 and 11,12,13,14 is connected to 12, 11 and 5,4,3,2 respectively ,5pin of lcd is grounded .A 330ohms resistor is connected to pin 15 vcc if you need back light other wise can be left open.

Digital Compass in Action



Hex and C file

Click Here to Download

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Home Security using GSM, this project secures your home and also creates a log of door activity mean open and close. It has four door sensors and if state of any door changes it will send a text on your cell. you can use these switches as per your requirements for example you can use a break beam detector instead of switch or can use PIR sensors too. So its up to you that what kind of security you need to implement. Here is a view of complete hardware



Here is Circuit Diagram




Author of this project is not sharing code with world Sad but you can write it at your own we all are here to help you in this regard Make use of forum if you need any kind of help

LINK