Blitzkrieg

[Soumya Y]

Hi

About the Blitzkrieg arena.. It's going to be in front of MB right. How big can we make it?

[Adarsh Hasandka]

Depends on what permissions we get. I'll try to get the entire wooded area from in front of library to mining department. Don't expect I'll get all of it, but at least the area around the fountain shouldn't be a problem.

[Adarsh Hasandka]

Hey I found this entore setup online. seems cheap and we can all have additional add-ons. What do you guys think? Should we use this setup (slightly modified for our convenience of course, ie change arduino/PIC to msp etc.) ?

[Adarsh Hasandka]

http://www.lasertagparts.com/mtdesign.htm
They have a fully functioning system with add-ons, pcb designs codes etc. Would greatly reduce our design work...

[Adarsh Hasandka]

Here is an update,
Based on what I've seen of other systems this is the format I'm proposing:
Game can be individual or team,
Totally 8 systems will be there (2 teams of up to 4 max)
Each system will have one grenade attached.
The gun will play sounds to provide all the sound effects.
There will be power-ups scattered throughout the arena (laser sight, rapid-fire, and armor for now if you can think of anything else let me know)
There will be an inbuilt time limit after which the system stops responding and says game over. (For now I'm thinking 20min... what do you guys think?)
at the end of the game, each system will display the number of deaths the player experienced.(I'm thinking of a way to find number of kills)
If i've missed anything, or if you feel I should add anything please let me know.
Regards,
Adarsh

[varun reddy]

If you want to know how many kills then you'll need some kind of wireless link between every system and you'll need to code each individual gun to transmit some specific code through ir so the guy getting killed will know who killed him right?

[Adarsh Hasandka]

Yeah I can easily find out who killed you, but sending that info back wirelessly during play would be a problem (price,complexity,etc). Instead, what about after the game is over, we collect the data from each jacket and make a scoreboard?

[pavan k shetty]

Heres something u could try out. Since you plan to use IR anyway you could try and send16  different message signals from different guns and use that information to find out who killed you and store it. And have a way of putting this data together in the end,by maybe plugging each MSP(or the jacket) to a comp which collects data on no. of kills and the attackers id. Then tabulate it and show it on a flashy interface.

On Fri, May 18, 2012 at 9:50 PM, Adarsh Hasandka <adarshh...@gmail.com> wrote:

Yeah I can easily find out who killed you, but sending that info back wirelessly during play would be a problem (price,complexity,etc). Instead, what about after the game is over, we collect the data from each jacket and make a scoreboard?

--
regards
Pavan K Shetty

3rd Year Btech 

ECE

NITK Surathkal

[varun reddy]

But thats only at the end of the game........ so you can't see score as a real time display. And if you want jackets i have like 20 of those 3m reflective jackets they got for last years technites.

[Adarsh Hasandka]

awesome that should be enough. we'll put different coloured leds on them to identify them. I can give the player his number of deaths on the fly though.... would that be enough? I really don't want to introduce RF wireless unless i really have to. at the end when they all turn in their jackets they could get a readout of the results.

[Adarsh Hasandka]

This is the sound code for Blitzkrieg. Those of you who know how to code the MSP can try improving upon what we already have

[Adarsh Hasandka]

Update on Blitzkrieg.
Yesterday Malali and I tested the range with the lens. Without aluminum foil or any other reflactive material, we were getting a range from technites room door to second window of MSH. I think this is enough. Upon adding reflectors, this can only increase. PCBs have also been ordered and should come in a week.
Work remaining:
This should be done before PCBs arrive:
Getting 4 more lenses (someone needs to go to the optician in surathkal with this lens and ask if he can make more like this {similar dia, 15cm focal length})
Making 10 Barrels with Reflectors inside.
Building 10 guns out of hardboard,wood,PVC.

Once PCBs arrive:
Soldering PCBs
Making 10 Grenades
Making and Stitching 10 Jackets
TESTING, TESTING, and more TESTING.

With this Blitzkrieg should be done well in time for Engi. I look forward to everyone's cooperation in this respect.

[Adarsh Hasandka]

Hi,
These are all the Blitzkrieg codes.
They were compiled on CCSv4.
If you have any questions, fell free to ask.
Regards,
Adarsh

[Jim Aldon D'Souza]

leelamma how's work on the new packet protocol going?

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--
Jim Aldon D'Souza

Third Year

Electrical & Electronics Department

National Institute of Technology Karnataka, Surathkal

[Leela Prabhu]

Got a couple... but haven't tried anything out practically.

Basically, it has addressing as a new field. 

We will have 8 jackets totally, right?

So 3 bits of address... Then one bit for error check. The reply would be some code

Leela Prabhu

Vth Semester

ECE

[Shashi Gowda]

What is this packet protocol? Put more info.

[leelaprabhu93]

Haven't tested with hardware so I can't give you too many details... basically we are looking for a light communication protocol that can manage the "who shot" issue. ..

The fields we need are

Address

Some error check

There can be a rf acknowledgment. 

In the case of collision we might need some thing to decouple the two. We can multiplex two frequencies maybe. ..

Sent from Samsung Mobile

[Shashi Gowda]

Oh. What's wrong with these http://en.wikipedia.org/wiki/Serial_communications#Examples_of_serial_communication_architectures? Maybe I'm completely off-track. Bear with me :p What if there is a 3-way collision? :P

[Niket Agrawal]

The present prices of TI's EZ430 RF target boards which we had discussed that day hav shot up to twice their old rates(20 X 2=40$), so they might not be feasible anymore.Trying to look for some cheaper ones or xbees maybe? coding+protocol part can be emphasized on as if now...

[Leela Prabhu]

its not a confined media... these protocols are for wired communication. They won't work in a wireless system. Well if there is collision then we generally ask for a re-transmission. This is not an option here, you can't re-fire. It's possible to avoid the situation by making an assumption that a perfect collision will never occur, i.e. two ppl will never shoot one person at the SAME time (with respect to the processor). If we want to avoid that then we can do something like what they do in some remote controllers... like each key emits a frequency- 1 emits 1kHz, 2- 2kHz, 3- 3kHz... The receiver picks up frequency and decides which jacket shot it. (a simple timer capture code on MSP430G2553)

On Mon, May 20, 2013 at 7:32 PM, Shashi Gowda <shashi...@gmail.com> wrote:

[Leela Prabhu]

@Niket- What were the wireless modules for again... :P I think i can get cheaper modules.

[Leela Prabhu]

http://www.rhydolabz.com/index.php?main_page=product_info&products_id=410

http://www.sunrom.com/rf-wireless/rf-transreceivers/rf-transreceiver-2.4-ghz-spi-interface-30-meters-range

These are cheap but they aren't easy to interface... if u want something which we would be familiar with

http://www.nskelectronics.in/cc2500_xbee_.html

http://www.nex-robotics.com/products-topmenu-45.html?page=shop.product_details&flypage=flypage.tpl&product_id=195&category_id=12

[Jim Aldon D'Souza]

XBEEs too expensive. One per jacket will come up to be a lot. They are, however cheaper than the TI ones (which have a wide application base). We need something dedicated and cheap. CC2500 seems just like it

[Niket Agrawal]

@Leela : Wireless modules were basically to send the info regarding team status(points,succesful shots,etc) to a PC which could be displayed...Ya interfacing and compatibility will be an issue to look upon before deciding...will got thru these once.

[Niket Agrawal]

@Jim: Ya,Xbees will be expensive...i just mentioned dem over der,but the TI CC2500 target boards aren't cheaper too.Those were preffered b4 coz der was no interfacing issues as such but the cheaper ones will hav these prblms so probably need to see that aspect as well.

[Jacob Varghese]

@JIM n niketh:Question How was all this done Last year . or weren't these features there .n  u guys were plannin on spending 1K per jacket extra O_O . Bros before buying stuff let me know . Engi marketing team just started. :P
Leelams: Shouldn't haskande's codes from last year be there. I remember seeing an IC online somewhere that could send a modulated signal at 38Khz carrier perfect for TSOPs .otherwise if haskande's codes aint there  enjoy doing it the old fashioned way ( code it :P )

Jacob Varghese

III year ,EEE department

NITK surathkal

INDIA

 

[Leela Prabhu]

Really??? Thats a dream IC. Haskande's code doesn't support the kind of addressing we are looking for

[Niket Agrawal]

@Jacob: these things were planned last year but eventually not
implemented.not planning to buy anything immediately,will let you know
about that

> *Jacob Varghese*
> *III year ,EEE department*
> *NITK surathkal*
> *INDIA*

[Jim Aldon D'Souza]

nothing concrete now. Though there will be some decent expenditure according to the revamping plan.