Designing a Multicolor Smartphone Torch App: Feasibility and Development

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Discussion Overview

The discussion revolves around the feasibility and development of a multicolor smartphone torch app that allows users to select different colors of light. Participants explore the technical requirements, hardware considerations, and potential challenges associated with such an application.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Prashant S Akerkar questions the feasibility of a smartphone torch app that can display light in various colors.
  • Some participants suggest that the feasibility depends on whether smartphones have LEDs capable of emitting multiple colors, with uncertainty expressed about the availability of such LEDs.
  • There are suggestions to add multiple LEDs (Red, Green, Blue, Yellow) inside the smartphone to achieve the desired functionality, but concerns are raised about the complexity of integrating this hardware.
  • One participant argues that if additional LEDs are added, it would shift the project from being solely software-based to requiring hardware development.
  • Another participant mentions that the existing flashlight LED in smartphones typically emits only white light, limiting the app's capabilities without additional hardware.
  • Some participants discuss alternative solutions, such as using USB-powered color-changing lights or IR LED transmitters, as more practical options than modifying smartphone hardware.
  • There is mention of bi-color and tri-color LEDs, which can emit different colors, and some participants share their experiences with these types of LEDs in other projects.

Areas of Agreement / Disagreement

Participants express differing views on the feasibility of the proposed multicolor torch app, with some agreeing that it would require additional hardware while others remain uncertain about the capabilities of existing smartphone LEDs. The discussion does not reach a consensus on whether the concept is viable.

Contextual Notes

Limitations include uncertainty about the availability of multicolor LEDs in smartphones and the potential complexity of integrating additional hardware into existing devices. There is also a lack of consensus on the practicality of the proposed app without significant modifications to smartphone hardware.

prashantakerkar
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Is it feasible to design and develop a Smartphone torch app which can display light in different colors selected by the end user?

Thanks & Regards,
Prashant S Akerkar
 
Computer science news on Phys.org
Only if the LED can emit multiple colors. But I don't know of any that can.
 
Thanks.

Will this be a complex circuit to be designed inside a Smartphone?

Have LEDs say 5 numbers inside the Smartphone device emitting 5 different colors viz Red,Green,Blue,White,Yellow controlled by the Smartphone torch app.
By selecting Red, the Red color light is emitted by the Red led diode.
By selecting Green, the Green color light is emitted by the Green led diode.
and so on ...

Thanks & Regards,
Prashant S Akerkar
 
Perhaps I wasn't clear. I don't know of any smartphones with LEDs capable of emitting anything other than white light. There may be some out there that can, but I don't know of them. Since these LEDs cannot emit anything other than white light, there is nothing you can do with software to make them emit a different color.
 
prashantakerkar said:
Smartphone torch app
There are two light sources (worth mentioning) on a typical smartphone. One is the flashlight LED for the camera: this gives 'white' light only and it is actually weak if running long.

Other is the screen, but to change the color of that is a bit trivial I think.
 
Thanks.

Will this work?

1 Add four more LEDs viz Red,Green,Blue & Yellow.
2 Design & Develop the torch app allowing the end user to select any of the five LEDs red,green,blue,yellow & white (camera). Depending upon the Led color is selected the torch flashlight color is displayed.

Will it be difficult to design & develop the Multicolor torch app for the Smartphone device?

Thanks & Regards,
Prashant S Akerkar
 
If you add more LEDs then that's no longer just an app: it's already hardware.
If it's already about hardware then I would rather start with an extension for power banks. Those has the capacity to effectively power a real torchlight, not only for show.
 
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Thank you.

Will it be a complex Multicolor Torch Smartphone app for design & development?

Radio buttons displayed in the app for selecting a single led color choice for display.

Thanks & Regards,
Prashant S Akerkar
 
prashantakerkar said:
Will it be a complex Multicolor Torch Smartphone app for design & development?
No, it will be utterly trivial if the hardware is in place, but no one is going to PUT the hardware in place, so I'd suggest you forget about this concept.
 
  • #10
prashantakerkar said:
Will this work?

1 Add four more LEDs viz Red,Green,Blue & Yellow.
2 Design & Develop the torch app allowing the end user to select any of the five LEDs red,green,blue,yellow & white (camera). Depending upon the Led color is selected the torch flashlight color is displayed.

Will it be difficult to design & develop the Multicolor torch app for the Smartphone device?
As mentioned, unless you work for Apple in iPhone development (or at one of their competitors), this is not something you will likely be able to do. And the cell phone makers would need some compelling business case to justify the extra cost of adding this new feature into their phones.

Something a bit more useful would be an IR LED transmitter that you can power from your phone's USB port that you use along with your phone's camera to be able to see in the dark (for moving around a dark house, for example, and not waking up your spouse with a light). It would likely use less power than the torch.

Or, if you are adamant that you want to be able to change the color of your phone's torch, just make a small version of this and stick it onto the back of your phone over the torch output...

http://www.company7.com/optec/graphics/ifw_wheel.jpg

ifw_wheel.jpg
 

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  • #11
You might be able to buy a USB powered colour changing light.
 
  • #12
Drakkith said:
Only if the LED can emit multiple colors. But I don't know of any that can.
LED can do that .
 
  • #13
psnkeras said:
LED can do that .
WHAT led can do that? Be specific
 
  • #14
phinds said:
WHAT led can do that? Be specific
There are bi-color and tri-color LEDs, and there are "white tuning" circuits that can drive them to different areas of the color spectrum. I've worked with them on a recent LED lighting project at work. Some small bi/tri-color LEDs have the separate die in the same LED package, but for higher powers, they will generally be tight LED arrays on a common heat sink:

https://eenews.cdnartwhere.eu/sites...files/images/amscontrib3530.jpg?itok=tC_r-Gzj

amscontrib3530.jpg
 

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  • #15
Cool. Hadn't heard of those. Thanks.
 
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  • #16
psnkeras said:
LED can do that .

Then there's no issue.
 

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