Variable voltage regulator :

Using this circuit we can obtain output greater than 5 V using IC 7805 and some capacitors and resistors .

Robotic Arm :

Our first Gripper : works well :D

Mechanism for converting rotary motion to linear motion :

All about Batteries :

http://www.rchelicopterfun.com/rc-lipo-batteries.html

Battery balance and T connectors :
http://learn.trossenrobotics.com/arbotix/arbotix-external-hardware/11-lipo-battery-guide.html

Servo motor interfacing with Arduino :

Adafruit :

https://learn.adafruit.com/adafruit-arduino-lesson-14-servo-motors/overview

Buy LiPo low voltage alarm

Ebay :

http://www.ebay.in/itm/LiPo-Low-Voltage-Alarm-cum-Voltage-Tester-1S-8S-/201216003341?_trksid=p2054897.l5658

Wall follower

Wall follower using PID and ultrasonic sensors :

Links :

1. https://translate.google.com/translate?depth=1&hl=en&rurl=translate.google.com&tl=en&u=https://fahmizaleeits.wordpress.com/2012/09/30/robot-wall-follower-dengan-kendali-pid/

Holonomic X Drive :

Useful Links :

1. http://blog.elliotjb.com/2013/10/holonomic-x-drive-tutorial-theory-of.html
2. http://blog.elliotjb.com/2013/10/holonomic-x-drive-tutorial-programming.html
3. http://blog.elliotjb.com/2013/10/holonomic-x-drive-tutorial-programming_31.html
4. http://blog.elliotjb.com/2013/11/holonomic-x-drive-tutorial-writing-test.html?view=flipcard

Vex Forum ( Full  explanation ) :

http://www.vexforum.com/showthread.php?t=12986 


 

Line following robot :

My Arduino based line follower using 8 digital sensors array

Demo run :

Links :

Fast line follower using PID algorithm :

1. http://thanoseleftherakos.blogspot.se/2011/10/pid-line-follower.html
2. http://www.techbitar.com/fast-line-following-robot.html (with code)
3. http://webdelcire.com/wordpress/archives/619 
4. http://42bots.com/competitions/arduino-line-following-code-video/( using different algorithm)
5. http://www.ikalogic.com/line-tracking-sensors-and-algorithms/  (tips for array intersection)
6. http://www.instructables.com/id/Robot-Line-Follower/ (9 sensor design - fast )

Using Rasberry Pi and Camera :

http://www.raspberrypi.org/an-image-processing-robot-for-robocup-junior/


New line follower design ( under construction ) :

Low ground clearance 

 

Intersection counting :

Fast line follower + Wall follower !!

All about GPS

GPS buying Guide :

https://www.sparkfun.com/pages/GPS_Guide

GPS Visualizer :

http://www.gpsvisualizer.com/calculators

GPS module :

http://www.rhydolabz.com/index.php?main_page=product_info&products_id=475

Kiwi Drive robot with Xbee's

Useful links :


1. http://makezine.com/projects/make-40/kiwi/
2. http://www.catalinacomputing.com/docs/Projects/OmniwheelBotProject/OmniwheelBotProject

For studying the motions :

3. http://www.technicbricks.com/2008/08/going-to-all-places-in-all-directions_29.html
4. http://www.mathsisfun.com/polar-cartesian-coordinates.html 

For the physics involved :

5. http://www.cs.cmu.edu/~pprk/physics.html

For the code( written in Ruby ) and its working :

6. http://www.catalinacomputing.com/docs/Projects/OmniwheelBotProject/OmniwheelBotProgram
7. http://www.catalinacomputing.com/docs/Projects/OmniwheelBotProject/OmniwheelBotProgramming

Mapping from joystick to motions :

8. http://thinktank.wpi.edu/article/136

Arduino code : ( not with PS3 remote )

9.  github.com/WickedDevice/OmniWheelControl

LIVE VIDEO STREAMING USING ANDROID

For those of you who want live streaming over Wifi or any other network using your Android smartphone use - IP Webcam


https://play.google.com/store/apps/details?id=com.pas.webcam&hl=en

1. Download the app
2. Start server
3. Type the address that's displayed in the screen in your address bar .
4. And here you go !!

NOTE : Both the devices should be in the same network ( Either WiFi or Mobile internet )

Microwind

CMOS circuit designing using Microwind :

1) Inverter :

 

Output :

2) NAND gate :

 

Output :

3) NOR gate :

Output :

4) 2 : 1 MUX using transmission gates :

Output :

5)  Expression Y = (ABCD) bar

 

Output :

Thats it !!  : D

VHDL Program for Counter

 VHDL MODULE FOR COUNTER :

entity cou is
    Port ( clk : in  STD_LOGIC;
           rst : in  STD_LOGIC;
           qout : out  STD_LOGIC_VECTOR(2 DOWNTO 0));
end cou;

architecture Behavioral of cou is
signal count : STD_LOGIC_VECTOR(2 DOWNTO 0) ;

begin

process(clk,rst)
begin


if rst='1' then
count<="000";

elsif(clk 'event and clk='1') then

count<=count+1;

end if;

end process;
qout<=count;


end Behavioral;

TEST BENCH :

BEGIN

    -- Instantiate the Unit Under Test (UUT)
    uut: cou PORT MAP(
        clk => clk,
        rst => rst,
        qout => qout
    );

    tb : PROCESS
    BEGIN
   
clk<='0';
wait for 10 ns;
clk<='1';
wait for 10 ns;
end process;

process
begin
rst <='1';
wait for 10 ns;
rst <='0';
wait for 150 ns;

       
END PROCESS;

END;

OUTPUT :