good start for Infrared Remote Library for the Arduino

http://www.righto.com/2009/08/multi-protocol-infrared-remote-library.html

Product / link	Quantity	Rate	Total	Condition
HXT500 5g / .8kg / .10sec Micro Servo	2	245.00	490.00	Brand New
HXT900 9g / 1.6kg / .12sec Micro Servo	4	190.00	760.00	Brand New
HobbyKing Red Brick 30A ESC	1	550.00	550.00	Brand New
Control Horns 13.5x16mm (10pcs)	1	65.00	65.00	Brand New
Turnigy 4mm Heat Shrink Tube - RED (1	1	20.00	20.00	Brand New
Turnigy 4mm Heat Shrink Tube - BLACK (1mtr)	1	20.00	20.00	Brand New
Turnigy Heat Shrink Tube 25mm Transparent (1	1	50.00	50.00	Brand New
PolyMax 3.5mm Gold Connectors 10 PAIRS (20PC	1	105.00	105.00	Brand New
Super Light 5 Spoke Wheel D46xH9 (5pcs/bag)	1	150.00	150.00	Brand New
Super Light Multi Spoke Wheel D40x11mm (5pcs	1	105.00	105.00	Brand New
FC 28-22 Brushless Outrunner 1200kv	2	450.00	900.00	Brand New
FC 28-05 Brushless Outrunner 2840Kv	1	450.00	450.00	Brand New
Reinforced Plastic Undercarriage (Pair) STRO	1	65.00	65.00	Brand New
Prop Saver w/ Band 3mm (10pcs)	1	195.00	195.00	Brand New
3mm Prop Saver w/ Adapter & 3 bands	1	100.00	100.00	Brand New
Light Foam Wheel Diam: 60, Width: 10mm (5pcs	1	160.00	160.00	Brand New
Hobbyking SS Series 18-20A ESC	2	300.00	600.00	Used
Turnigy Accucel-6 50W 6A Balancer/Charger w/	1	1500.00	1500.00	Used
AX 2308N 1100kv brushless Micro Motor	1	250.00	250.00	Used
FC 28-12 Brushless Outrunner 1534kv	1	250.00	250.00	Used
Turnigy 1000mAh 3S 20C Lipo Pack	1	275.00	275.00	Used
ZIPPY Flightmax 800mAh 2S1P 15-25C	1	300.00	300.00	Used
Turnigy AA LSD 2200mah Low Self Discharge (r	8	50.00	400.00	Used
Turnigy 2200mAh 3S 20C Lipo Pack	2	475.00	950.00	Used
Turnigy 1600mAh 2S 20C Lipo Pack	1	375.00	375.00	Used
HobbyKing 1500mAH LiFe 3S 9.9v Transmitter p	1	500.00	500.00	Used
Radio Turnigy 9X  with 4 receivers	1	5500.00	5500.00	Used

HobbyKing R/C Hobby Store :

HobbyKing R/C Hobby Store :

Well known site for buying RC products. Most prefered from RC enthugiast. Very populor for low cost shipping, avilability of different brands RC products and timly and quality deliveries.

Microcontroller programming and spares

http://extremeelectronics.co.in/category/avr-projects/

My fevorite sodring products

http://www.soldron.com/

Turnigy 9x + Android + telemetry

http://rctech.blogspot.in/?view=sidebar#!/2012/01/turnigy-9x-frsky-telemetry-android-diy.html

Using android sensors

Very good article on using android sensors.

http://www.ibm.com/developerworks/opensource/library/os-android-sensor/index.html

Electronics Blog

http://dduino.blogspot.in/2011/10/here-are-dome-pics-of-ntxtetrix-robot.html

PC Remote Control USB

http://hackaday.com/2008/10/30/how-to-usb-remote-control-receiver/

Bicycle computer / Speedometer

Many of 2 wheelers (Motor cycles) we drive in India comes with speedometer.  But isn’t it cool idea to have speedometer to your bicycle also.

There are many digital speedometer are available now. These also comes with many functions , like Speed, top speed , trip meter , average speed etc..

Very basic instrument that I am using comes with following features which I feel sufficient for hobbyist.

Ø  SPD - Current Speed of bicycle

Ø  ODO - ODOMeter (Total Distance)

Ø  DST - Trip Distance

Ø  MXS - Maximum Speed

Ø  AVS- Average Speed

Ø  TM - Elapsed Time

Ø  RPM - Rotation per minute

Ø  CLK - Clock (12H/24H)

Ø  SCAN - (Icon)

Ø  "Up" / "Down" Comparator (Down arrow shows speed less that average speed and vice varsa for up)

Ø  Setting Speed Scale (km/h,m/h)

Ø  Setting Tire Circumference (60CM-229CM)  : This is primary setting you need to do while installing speedometer. Feed the circumference of bicycle wheel.

Ø  Setting the last value of ODOMeter
Ø  Auto On/Off

Installation:

On ordering or by purchasing you will get one speedometer, magnet, sensor, and battery and instruction manual.

Installation is very easy:

Step 1: Put the battery inside computer and close the lid, observe the lid it contains small rubber washer to it. This will provide somewhat resistance to water.

Step 2: Input the circumference of your wheel for my MTB it’s 209. Here left button of computer work as mode and right button works as counter just like you set any digital watch.

Step 3: Set as per your requirement Miles/Hr or Km/Hr I prefer Km/Hr as it’s very common in India.

Step 4: Set current time in 24 hour format or in 12 hour

Your computer setting is done! Now sensor.

Step 5: Take the magnet and fit it to spoke of wheel facing to fork of the cycle.

Step 6: Fit the sensor to the fork as such that it will face to magnet attached to spoke. Make sure that distance between the magnet and sensor is 2-3 millimeters only.

Step 7: Attach computer on holder of sensor, Check any speed recording you are getting on computer by moving wheel forward and backward, if not readjust the sensor and magnet until you get some reading on computer.

Step 8: If you are getting some reading then it’s time to fix the computer on handlebar and take real test drive! Cheers!!  

Step 9: Validate the accuracy. Easy way to do this try to cover same distance from your bicycle and motorcycle and by car. If the distance mismatches adjust circumference accordingly. (You will have to remove and re-install the battery to do this.)

The bicycle computer attaches to the mounting shoe by sliding the unit it snaps firmly into position. So you can easily unplug it and keep it with you if park your cycle somewhere.

RC Helicopter.

About RC Helicopter.

RC Helicopters are Radio Controlled helicopters. It can be control from certain range say 50m or 100m  depending on the trans-receiver circuit.
History

My younger brother give me two fuselage of broken helicopter and ask me to do something with it.

So I combined both to build one working one. Tail and receiver was broken of first so get it replaced from another one.

Transmiter PCB was broken after soldering some broken paths and replacing couple of registor it start reponding.

Below are the pics of completed assembly. While first flight test transmiter is powered by my cars battery.

Watch this helicopter in action here.


Some Pictures

Assembled helicopter  :                                                       12V power suply from cars battrey :