Aug 12, 2012

We are men ... We make fire !!!

Time: April 2nd 2011, 3AM
Location: Shambhavi Palace, Manipal.

The whole building is asleep. Two engineers toil through the night building the quadrocopter. Hunger sets in and they decide to make some food. The kitchen cupboards are full. The eggs are plenty. There is bread . There is butter. There is cheese and there is Maggi. The only problem there is no gas lighter or matchstick that can be used to ignite the stove.

While in Manipal i have on occasion used the heat from my laptop to heat burgers (Only possible while rendering or playing a intensive video game). However in this case we (Mudit Gupta and me) needed fire to get the job done.

If you ever find your self in a similar situation the following things don't work:
  • Trying to burn a resistor on the stove.
  • Trying to blow up a capacitor above the stove.
  • Trying to charge and then discharge a 470uF capacitor over the stove.
  • Trying to charge and then discharge a 2200uF capacitor over the stove.
  • Trying to grind a drill bit to a piece of metal to generate sparks over the stove.
  • Trying to short a 6V lead acid battery over the stove.
  • Using the heating coil from a Hot Glue Gun (What the hell were we thinking).
  • Using a soldering iron.

What does work is shorting a 24V transformer to create sparks to ignite the LPG gas.

The stove in question:

Success (Sorry for the horrible video)

If you liked this you might also like : How To Make Omelette Using Power Tool and Demel-7700-Experiments

Demell 7700 Experiments.

I already own a cordless drill which has come quite handy in all the projects I have done ever since I bought it. I thought of increasing my collection and so decided to buy a Dremel tool (7700-30). This is a 7.2v cordless rotatory tool.

With the drill I made a an omelette/defrosted a fridge so for the Dremel tool I decided to go for a similar test. This time i decided to slice a pizza using the power tool.

Step 1: Order a pizza - Dominos Regular Margherita Pizza !! 

Step 2: Charge the battery for your Dremel. Technically this should be step 1. 

Step 3: Attach cutting wheel to the Dremel.

Step 4: Slice and Dice away

Step 5: Realize it did not work because the cutting wheel size was too small. Plan to order a bigger cutting wheel.

Step 6: Use a knife. Eat Pizza.

Anyway after that failed I decided to come-up with something different to show the power of the Dremel.
I have recently purchased a dart board and have been paying around with it quite a lot due to which one or two of the darts had become quite blunt so I decided to sharpen them. My flatmate who is a photography enthusiast (More like a photography maniac) decided to click some high exposure photographs of the same. 

The Tool:

The Victim: 

The Result

Exposure: 1/640 sec , ISO 6400

Exposure: 1/200 sec , ISO 6400

Exposure: 2 sec , ISO 1000

Exposure: 2 sec , ISO 900

Exposure: 2 sec , ISO 2800

Exposure: 2 sec , ISO 2800

Photography Credits: All the good looking ones by Rahul Krishna Upadhaya.

New Desktop (Well ... Sort of)

Well this is awkward. I wrote this post about 5 months back but forgot to upload it. I just realised my mistake today while writing another post. Anyway here goes.

Finally got a new system !!!

My current laptop has been tortured enough ( May it rest in peace.

Processor: Intel i7 2600K 3.4 GHz
Mobo: ASUS P8Z68-V PRO/GEN3 Motherboard
RAM: Corsair Vengeance DDR3 4 GB 1600MHz x 2
Graphics: Zotax nVidia GTX 570
Cabinet: Cooler Master Elite 431 Plus
PSU : Cooler Master Extreme Power Plus 600 watt
HDD: Currently using the 160GB 2.5" HDD from my laptop. Will update later.
Monitor: Dell S2230MX 21.5" Ultra-Slim Monitor with LED

PS: Rendering on this is about 8.75 times faster than my laptop.

Feb 7, 2012

Quadrocopter - Part 10 - I find your lack of faith disturbing.

It is possible i might be overdoing it with the Star Wars references. If you find a better name for the next post (which will probably be the first flight) let me know.

I worked the whole of last Sunday and finally got the model now ready. So here it is. This time the whole model weighs only 1396 grams. A 19% improvement on the old model.

 The motor (EMAX CF2822) along with the propeller (8"x4")  and the bullet connectors (3.5 mm)

 Luke !!!

Battery - Tied down with Velcro. 

Link to more posts on the Quadrocopter.

Quadrocopter - Part 9 - A New Hope

There have not been any updates from my side on the quadrocopter for the past 6 months. This is partly because i was working on other stuff but mainly because i got lazy (really really lazy). So one fine day about 2 weeks ago i decided that i have to finish this project. I ordered a quadrocopter control board as i was getting one at a very reasonable price (details later) and i did not have the time to build one for myself (as earlier planned - i might do this sometime later). I did make some changes to the design changes. 

Firstly this time i went for an entirely wood construction instead of the aluminium and acrylic combination(what the hell was i thinking??). There are a few reasons for this. It is easier to work with than aluminium. Wood reduces the vibrations of the motors. Wood is cheaper (was able to get material for building 4 quadrocopter for 280 bucks !!!!) and most importantly it available near my house unlike aluminum rods (laziness FTW). 

Secondly i purchased some matching clockwise and anti-clockwise propellers hence i will not have to work at compensating for the angular momentum by tilting the motors.

Finally i decided to do away with the nuts and bolts that hold the main structure and go for screws. This was easier as i was going for wood instead of aluminium. This also helped reduce the weight.

The quadrocopter control board - Ordered from ..... More info on the board at

The materials

 Plywood (1/4"x6"x6" pieces).

 Birch wood (1/2"x3/4"x13").

The completed assembly.

I also used a lot of bullet connectors while building the model and they require a lot of soldering (which im not very good at - mainly because i keep on burning my finger and at times my eyebrows) so i decided to make a bullet connector soldering stand. I was later told by my friend Mudit Gupta that people have already though of this.So i looked it up and people had indeed thought of this (There goes my patent). Anyway here is my attempt:

Link to more posts on the Quadrocopter.

Jan 10, 2012

Pearl EPO Glider 800 - First Flight / Crash

For my 50th blog post i decided to post videos of the crash of the Pearl EPO Glider 800. The crash happened on our first try on the 18th of December. I would have posted the videos on that date but we had recorded the videos using a sony handycam and it took some time to extract the videos (I hate sony handycams and their non standard USB's and Memory Cards). Anyway i did manage to get the videos and here they are. Enjoy

First Try Second Try

Ill fix it up and have it up as soon as i have some free time.In the mean while enjoy he pics of the broken plane: