0

Making an LED Flash Grenade (for cosplay)
Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.

Making an LED Flash Grenade (for cosplay)

by transmut1 on Wed Nov 08, 2017 9:43 am

Hi there, first time posting on here and not sure if this is the right spot, so admins please advise!

Ok, so what I'm trying to make is a Plasma Grenade from the halo video game series. I already have the grenades 3d printed but I need to make the electronics to go inside them.
I'm stuck on how to do this. I don't want a whole bunch of them, but I do want them to light up in a 360 deg direction as much as possible. I need to put a small speaker in there to for the sound. Weight is an issue too. I want it to click on with a button and have the lights come on, then the sound increases to an explosion sound and a bright flash of light, which can either be making the existing LEDS flash even higher, or using a flash LED or something. My existing 3d prints are about 3" i.d. I think.

There is just so much stuff out there to build from and I don't have time to do all the research, so I'm hoping you guys can help me save some time.

Looking forward to your ideas!

Rich

transmut1
 
Posts: 8
Joined: Fri Dec 18, 2015 12:07 pm

Re: Making an LED Flash Grenade (for cosplay)

by adafruit_support_bill on Wed Nov 08, 2017 10:05 am

Assuming you have some sort of microcontroller inside, Neopixels are probably the simplest way to go. These are available in many form factors - ranging from individual leds to rings, sticks & strips. https://www.adafruit.com/category/168

The best choice will depend a bit on the deign of your 3D model. A pair of rings mounted back-to-back would give you pretty much 360 degree coverage. You could also do multiple individual LEDs studded around the outside of the case.

adafruit_support_bill
 
Posts: 62900
Joined: Sat Feb 07, 2009 10:11 am

Re: Making an LED Flash Grenade (for cosplay)

by transmut1 on Wed Nov 08, 2017 1:48 pm

adafruit_support_bill wrote:Assuming you have some sort of microcontroller inside, Neopixels are probably the simplest way to go. These are available in many form factors - ranging from individual leds to rings, sticks & strips. https://www.adafruit.com/category/168

The best choice will depend a bit on the deign of your 3D model. A pair of rings mounted back-to-back would give you pretty much 360 degree coverage. You could also do multiple individual LEDs studded around the outside of the case.


Thank you for your quick reply!
Yeah I was definitely thinking of having some kind of controller in there, I mean I need room for the battery back and sound card too heh.
So going by what you're suggesting, a couple of these https://www.adafruit.com/product/2856 should do the trick, back to back?
I could have them go bright, and then have them flash super bright for the bang effect?
Or should I add a few of these https://www.adafruit.com/product/2375 in the center for the bang effect?

Originally I was thinking of using a bunch of these https://www.adafruit.com/product/3094 arranged in made up strips, kinda following a peeled orange pattern, you know the seems are the LED lines, but I think the rings would be way better. Just how to I get the light to diffuse evenly?

transmut1
 
Posts: 8
Joined: Fri Dec 18, 2015 12:07 pm

Re: Making an LED Flash Grenade (for cosplay)

by adafruit_support_bill on Wed Nov 08, 2017 1:58 pm

Hard to make specific recommendations without seeing where they need to be mounted. The simplest way to get diffusion would be to print your grenade shell out of a clear or translucent white filament.

The mounted neopixels are definitely easier to work with than the bare chips. The bare chips would require that you also wire in some decoupling capacitors (typically one per pixel). The rings and other mounted pixels have those already built-in.

adafruit_support_bill
 
Posts: 62900
Joined: Sat Feb 07, 2009 10:11 am

Re: Making an LED Flash Grenade (for cosplay)

by transmut1 on Wed Nov 08, 2017 4:45 pm

adafruit_support_bill wrote:Hard to make specific recommendations without seeing where they need to be mounted. The simplest way to get diffusion would be to print your grenade shell out of a clear or translucent white filament.

The mounted neopixels are definitely easier to work with than the bare chips. The bare chips would require that you also wire in some decoupling capacitors (typically one per pixel). The rings and other mounted pixels have those already built-in.


I gotcha.
Yeah they are printed out of translucent clear filament and really strong, made to be tossed around for cosplaying hehe.
I just wasn't sure if I would need to add some thin packing foam to help spread the light, so you don't see the individual leds, like ho they do on an arc reactor.
I'll definitely go with the mounted rings then because that will just be easier all around I think. Do you think one of the small trinkets https://www.adafruit.com/product/1509 will work for controlling them?

transmut1
 
Posts: 8
Joined: Fri Dec 18, 2015 12:07 pm

Re: Making an LED Flash Grenade (for cosplay)

by adafruit_support_bill on Wed Nov 08, 2017 5:28 pm

Any of the Trinkets will be able to control them. The original Trinket will control up to about 100 pixels. The Pro Trinket will do 500 or so. The M0 trinket will do thousands.

adafruit_support_bill
 
Posts: 62900
Joined: Sat Feb 07, 2009 10:11 am

Re: Making an LED Flash Grenade (for cosplay)

by transmut1 on Fri Nov 10, 2017 9:08 am

adafruit_support_bill wrote:Any of the Trinkets will be able to control them. The original Trinket will control up to about 100 pixels. The Pro Trinket will do 500 or so. The M0 trinket will do thousands.


Awesome, thank you so much for all your help!!

transmut1
 
Posts: 8
Joined: Fri Dec 18, 2015 12:07 pm

Re: Making an LED Flash Grenade (for cosplay)

by transmut1 on Fri Nov 10, 2017 9:39 am

adafruit_support_bill wrote:Any of the Trinkets will be able to control them. The original Trinket will control up to about 100 pixels. The Pro Trinket will do 500 or so. The M0 trinket will do thousands.


Another question though, how do I power the assembly, since it needs 5v and all the lipo batteries ada has are 3.7v, though it looks like from the specs it requires up to 7v to run?

transmut1
 
Posts: 8
Joined: Fri Dec 18, 2015 12:07 pm

Re: Making an LED Flash Grenade (for cosplay)

by adafruit_support_bill on Fri Nov 10, 2017 10:05 am

Neopixels run fine on 3.7v when driven by a 3.3v processor.
\
The Feather 32U4 Basic proto might be a good choice for a processor. It is a compact lightweight processor with a built-in LiPo charger.

https://www.adafruit.com/product/2771

adafruit_support_bill
 
Posts: 62900
Joined: Sat Feb 07, 2009 10:11 am

Re: Making an LED Flash Grenade (for cosplay)

by transmut1 on Fri Nov 10, 2017 10:16 am

adafruit_support_bill wrote:Neopixels run fine on 3.7v when driven by a 3.3v processor.
\
The Feather 32U4 Basic proto might be a good choice for a processor. It is a compact lightweight processor with a built-in LiPo charger.

https://www.adafruit.com/product/2771


I have a stock of some parts already, so, could I use these together to run the rings and sound?
https://www.adafruit.com/product/1509
https://www.adafruit.com/product/2124
https://www.adafruit.com/product/1578
https://www.adafruit.com/product/2210

or can that feather controller do the sound too??

transmut1
 
Posts: 8
Joined: Fri Dec 18, 2015 12:07 pm

Re: Making an LED Flash Grenade (for cosplay)

by adafruit_support_bill on Fri Nov 10, 2017 10:31 am

Those parts should do the job. If you are going to run the pixels on 3.7v, you need to use the 3.3v Trinkets.

By itself, the Feather does not do sound. But there is a "Music Maker Feather Wing" designed to plug into it. https://www.adafruit.com/product/3436

adafruit_support_bill
 
Posts: 62900
Joined: Sat Feb 07, 2009 10:11 am

Re: Making an LED Flash Grenade (for cosplay)

by transmut1 on Fri Nov 10, 2017 11:14 am

adafruit_support_bill wrote:Those parts should do the job. If you are going to run the pixels on 3.7v, you need to use the 3.3v Trinkets.

By itself, the Feather does not do sound. But there is a "Music Maker Feather Wing" designed to plug into it. https://www.adafruit.com/product/3436



Ah, well overall weight is definitely an issue, so less parts is better I think, so I can just use that baby right there and accomplish everything I'm hoping too?
Lights and sound with one board?

Though I take it this board isn't as plug and play with the sound as the one I already have?

transmut1
 
Posts: 8
Joined: Fri Dec 18, 2015 12:07 pm

Re: Making an LED Flash Grenade (for cosplay)

by adafruit_support_bill on Fri Nov 10, 2017 11:21 am

The Feather Music Maker Wing does require some programming to play the sounds. It doesn't have the hardware triggers like the Fx board. But it should do what you need for your project.

adafruit_support_bill
 
Posts: 62900
Joined: Sat Feb 07, 2009 10:11 am

Re: Making an LED Flash Grenade (for cosplay)

by transmut1 on Fri Nov 10, 2017 11:25 am

adafruit_support_bill wrote:The Feather Music Maker Wing does require some programming to play the sounds. It doesn't have the hardware triggers like the Fx board. But it should do what you need for your project.



Awesome, I think I can manage that heh. Thank you for all your help!!
updating my shopping cart now hehe.

transmut1
 
Posts: 8
Joined: Fri Dec 18, 2015 12:07 pm

Please be positive and constructive with your questions and comments.