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Mini ZVS

Lasersaber SJR 2.0:Strange oscillating

The SJR 2.0 by Lasersaber

                                                    This project is a replication 
                                                   I hope you like this video

Home Security System Using Cell Phone

The project is about a home security system in which a cell phone is used as a device that will alert the owner of the house when an intruder enters the house.

The owner just have to turn on the system before leaving his house.When an intruder enters the house in the absence of the owner the owner receives a call from a registered number which is the phone number of the hacked mobile phone at his/her house.


Materials (electronic components) required

1) A Cellphone having press buttons (i used an old one which i had).

2) A 10K ohm resistor.

3) A 10K ohm potentiometer.

4) An LDR (Light Dependent Resistor) 10K ohm or A 2 legged IR sensor (IR sensors are better bcoz they are not affected by surrounding light).

5) An LM358 (Dual op-Amp) IC.

6) An Optical LASER (I used a red LASER). In case you are using IR sensors use an IR LASER.

7) wires.

How does the Circuit work.

Cell phones have switches which when pressed short the terminals (gold plated) hence a number is seen on the screen

so what i have done is put my cell phone number on speed dial on the phone i hacked and when this number is pressed for a while i get a call.

so basically what we r doing is a circuit that will short the phone terminals. when a intruder enters the house.

IC LM358 is a dual op amp.

The output of an op amp is difference of the input times the gain of the op amp. ie. it compares the 2 inputs.

NOTE: refer datasheet for ore details about the IC.

pin 2 of IC 358 is threshold a potentiometer is connected to it so it forms a voltage divider and a particular voltage is set up at pin 2 which the op amp compares with voltage at pin 3.

to pin 3 an LDR is connected it behaves in following way.

1) when light shines on LDR its resistance decreases hence a more positive voltage is set up at pin 3 which forces the output to be high.hence there is a potential difference at the terminals of the number on the cell phone.

2)when the light is cut off by the door which is opened by the intruder the LDR resistance increases hence a more negative voltage is set up at pin 3 which forces output to be low (0v).

in the equivalent op amp circuit shown Avid is approximately 0v when output is low and resistance Ro is very small hence the output is shorted to the ground thus shorting the 2 terminals of the cell phone.

Youtube Channel:http://goo.gl/1m8Rs6

Credits instructables :http://goo.gl/FJOQRf

The "Mister Fantastic" Sensor

This project involves a flex sensor, a type of sensor that senses when it is flexed, or the Mr. Fantastic of all sensors much like the laser LED is the Cyclops of sensors. It basically a resistor that puts more resistance as it is flexed. This can be useful in many different ways, such as in toys when an arm is bent, it can make a sound. Or if a shoe is flexed, LED’s turn on. The possibilities are only limited by your own imagination.

Step 1: Materials

Things You Will Need: (And where to get them.)

Arduino Uno: https://www.sparkfun.com/search/results?term=arduino+uno

9 LED’s: https://www.sparkfun.com/products/9590

Flex Sensor: https://www.sparkfun.com/products/10264

1 22K Resistor: http://www.jameco.com/1/1/28314-cf1-2w223jrc-resistor-1-2-watt-5-carbon-film-22k-ohm.html

9 33o-630 Ohm Resistors: http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_690742_-1

11 Jumper Wires: https://www.sparkfun.com/products/11026

Breadboard: https://www.sparkfun.com/products/12002

Step 2: Wiring the Flex Sensor

To start, plug a jumper wire to the analog pin 0 on the Arduino. Then plug this jumper cable behind the left side of the flex sensor on the bread-board. Then, take another jumper wire and plug it into the 5v on the Arduino. This jumper will connect behind the other side of the flex sensor on the breadboard. Next, plug in the 22k resistor behind the same analog 0 jumper wire, and plug the other end 2 spaces apart. This will be where the ground wire will be. Plug another jumper cable into the ground on the Arduino and put the other end on the same rail as the other end of the resistor not connected to the flex sensor. The wiring for the flex sensor should now be done. Up next, the wiring for the LEDs!

Step 3: Wiring the LED's

On the opposite side of the breadboard, line up LED’s in a horizontal row, with the positive leg (longer leg) leading to the left. Then, plug in jumper cables from the 12, 11, 10, 9, 8, 7, 6, and 5 pins on the Arduino to the negative leg (shorter leg) on the Arduino. Following this, plug in those 330ohm resistors into the same rail as the long leg of the LEDs, while putting the other leg into the negative rail of the Arduino. The wiring for this project should be finished as of now. The end result should be that the flex sensor shuts off the LED's depending on the amount of flex used.

Step 4: Sample Code

The sample code for the project. Feel free to adjust, use it, or do whatever you want with it to fit your needs.

Link:http://www.mediafire.com/view/qqzk4aceyebhtv7/The_Mister_Fantastic_Sensor.txt

Instructables:http://www.instructables.com/id/The-The-Mister-Fantastic-LED/

DIY tilt switch

In this instructable I'll show you how to make a simple tilt switch, this tilt switch works best with microcontrollers that can debounce the signal and overcome interferences produced by vibrations.

Pros:

-Tiny.

-Easy to make.

-Extremely cheap.

-Perfect for small projects with microcontrollers.

Cons:

-Vulnerable to vibrations.

-Not really suitable for 3d motion (might activate at different angles depending on how it's placed).

-Quite exposed to the elements, might not have a very long life under tough conditions.

Materials:

• Shrink tube (5mm - 3/16inches Ø).
• Bearing ball ( 3mm Ø) (or many of a smaller size).
• Male pin strip.

Step 1:

Bend the pins until the ball fits nicely between them, this will prevent unstable connections, don't bend them too much, just the right angle so the pins fit inside the shrink tube. 

You can also use 2 pairs or pins and make a bi directional tilt switch.

Step 2:

Cut about 2cm (0,8 inches) of shrink tube and place the pins inside it, leave about 1mm of separation between the end of the shrink tube and the black plastic that holds the pins, then proceed to heat that part until the tube contracts and can hold the piece by itself, be careful when you heat the part near the long pins, too much heat applied near the end of the pins and the gap won't be enough for the ball to touch them, try to heat only near the base. 

Step 3:

Add the ball, if you want more stable connections you can try to put many balls with a smaller diameter.

Close the end by heating the tube, if you want to close it completely you can heat it and melt the end pressing it with pliers.

If all has gone right you should have a functional tilt switch.

This is not my project i found this in the instructables go and check this guy he has some nice project:http://www.instructables.com/id/DIY-tilt-switch/