Custom PCB: Help needed for the design of RGB Chemion-like glasses?

When I found the Chemion glasses I at first thought they were very cool, but they were still missing something. So searching on Instructables got me to this project from RGBFreak with RGB's. However this project was for my purpose still missing something.

So my main goal was to create a portable (a wire down the glasses to a box in your pockets seems a bit annoying) version of RGBFreak's glasses with the following subgoals:
  1. Built-in Arduino with dip socket
    • First of all to burn the arduino image on the chip and also to transfer new code to the chip
  2. Rechargeable batteries
    • Li-ion batteries to ensure a good battery life (also maybe decrease brightness)
    • A way to recharge the batteries
    • Batteries behind the ears (looks like the most ergonomic position)
  3. More memory
    • Additional memory to extend the memory on the arduino alone (RGBFreak had to include this because of much code)
    • Shrink down the code (RGBFreak used 256 colors, maybe a way to use less colors?)
    • Different presets and being able to switch between them, with one eq preset and one or more BT presets (later explained)
  4. Bluetooth
    • RGBFreak created an app to control the glasses with an app from his smartphone
  5. A Visual EQ (because it's pretty darn awesome)
    • Include a microphone
    • (RGBFreak worked on it, but wanted it via his smartphone and it was too timeconsuming to figure it out)

So, according to these goals I made this design. However, since this project costs a lot of money, especially the custom pcb's, I would like to know for sure my project should work. Otherwise, a good idea which can reduce cost is also very helpfull. What I found was that EasyEDA is still the cheapest manufacturer I can find (and I must admit I would like to have black pcb's because it looks very professional).

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iceng1 month ago

Your battery positives are connected wrongly.

In the right board the battery positive is connected to the minus or ground

Jeremyv30 (author)  iceng1 month ago

Thanks! I didn't noticed that. Does the rest of the design look solid, or are there still some flaws in it?

iceng Jeremyv301 month ago

Sure, U3.2 will always be low because the minus (-) input will always be higher then the plus (+) input that means it will Never stop charging..

I think you should try to make a pair of glasses that use a 3axis accelrometer to detect head motion to select LED color pattern and counter movement..

And use removable rechargeable batteries with a store bought Lion charger..

Otherwise I do believe you are setting up a slow fail to complete project..

Jeremyv30 (author)  iceng1 month ago

Hmm, interesting. I didn't design the system by myself, so I guess it was a pretty good idea to ask others. Since I would like to have everything in a single package, I would still like to be able to charge them just to the glasses. Do you have a good schematic for a Li-Ion battery that could fit my needs?

Also, my intention for these glasses are to wear them at partys or festivals etc. So using head motion detection doesn't sound like a good idea for my purpose. However it can always be altered (if it does work, I'm planning to do a instructable about it).

Also, do you have any suggestions how to come by cheap pcb's? Next September I will be studying again at the TU Delft (so I live in the Netherlands), but I'm not sure if there's a possibility of printing the pcb for students. So my only options would be to buy from EasyEDA (or any other PCB manufacturer), or maybe a perfboard (which will take loads of time).

Jeremyv30 (author)  Jeremyv301 month ago

Whoops, I need to correct myself: I didn't design the charging part of the system.