It's ~2.2W with the brightness setting 10, ~ 115g and the battery life is ~ 45min. Originally there were plans on hot swappable batteries, but that did not materialize in the timeline...

@@4sIElectronics swappable battery is still a good idea if the wear have to last for longer (cosplay conventions, smart tech event show, etc), same with a modular design in general (panel w/o touch, microphone, pre-recorded patterns, hard on/off switch) It’s neat tho, can’t wait to see it released!

It weighs ~115g with the battery, and the whole back being velcro, distributes it fairly evenly. It could be an option to just have a small as possible board without the touchplate and the battery.

@@4sIElectronics Nice, well it is awesome nonetheless!

ws2812b1010, atleast xinglight makes them in this package

Yes, it is using the microphone and doing 255 bin fft, that is then selectively condenced / averaged to 48 bins for the bars. With the original ArduinoFFT I had a lot of problems with frequency folding.

That sounds like worth to try

@@4sIElectronics Subbed {Subbed(waiting for next video)}

No, there is no protection against that. on the breakout board there is space for adding at least diode to VUSB, and series protection resistors similar to this revisions usb data lines. I don't think that there is problem on the usb differential pair, it's pretty robust by the standard, tho the series resistors would probably not hurt. Unfortunately I didn't measure the ones on the board, and they do not have markings on them. The VUSB is probably the bigger problem, and on the mini usb, at least in this revision there is no reverse blocking diode, so as for now I have stated that just do not plug them in at the same time. Unfortunately there is no more photos.

@@4sIElectronics Thanks for the detailed answer. Where did you attach the USB c breakout board to? Just hot glued on top of the pcb? Or did you fix it to the chassis?

@@paulemeister42 On the original I first used hot glue, but just to be sure I changed it to epoxy. Haven't had or heard problems with it coming loose. Tho some actual fasteners would be great for potential repairibility, but there is not really any space. For this particular revision I designed the pcb to be almost exactly the size of the opening, so it stays in place pretty well even without any glue. The space also depends much on the revision of the calculator body...

I'm not completely sure if I understood this correctly, if you mean the output of the fly-back transformer, I measured the one with highest resistance and used that. At least on the ones that I have had it has been this way, but you can also do dirty trick and check by pointing the HV output cable to the pins and see where it jumps the greatest.

I'm not exactly sure if you are talking about the 3D-printed part that keeps the led with its heatsink star centered or the small reflector. I also had some trouble getting the reflector back on, which was mainly due to the solder joints rising too high. Which kind of driver do you have on your flashlight? Because the original (atleast mine) does not step up the voltage, so it doesn't even light up with it. Also, how is the led mounted on your flashlight? (the bottom of the star heatsink should be electronically isolated) with this kind of power, the cooling becomes a big problem, and that is pretty much the only problem with my flashlight. The highest power can be used pretty much only if the surrounding air temperature is below -5 deg C... I thought that I lost all the footage making the heatsink, but I managed to recover some of the pictures. Here is a folder where you can find some pictures of the heatsink mega.nz/folder/fs93XDjB#fP3gwI955aXRITtRxp-vCQ

@@4sIElectronics wow thank you so much. I was not expecting such a detailed and comprehensive answer. I'll send this info to the chief engineer karma and see if we could get this fixed. Thank you again, I really appreciate your response.

I have now done this to couple more calculators. The thing is that TI has many different revisions of the calculator, and the internal construction is not always the same, and because of this, the pcb cannot be used in all revisions of the calculator.

(at least) not yet.

I'm not really looked into, but WLED might work with matrices. Another one is that adafruitGFX probably could be used for text and grahics creation. They are also probably highly optimized and stable. I created these animations and the text function for practise. The fft code has been built largely around this project:(github.com/daoquyanh2000/ESP32-spectrum-analyser), to understand how arduino fft works and how to blend the bins.

@@4sIElectronics thanks, Already have WLED and WLED SR. But few effects which your demo has are not available on WLED or even when using LedFx. Will check those link. Appreciate your help 🙏🙏 Wish you a great holidays and New Years. Wishes from India.

@@4sIElectronics What about for Raspberry Pi Pico Ws? Know of anything for that? Awesome work btw. I'm looking into building something similar.

Ahhwwwwwauuuuuuawwwwhhauuu

I was thinking the same thing lol sounds crazy. The sound might be liquid returning to the compressor since there's practically no evaporator. It's a 410A compressor running on propane.