I got the assembled kit without headers and have some (minor) issues: - The assembled version comes fixed onto the battery holder with several dual-sided sticky pads and very short leads to the battery, which makes it hard to solder cables to the board. - Contacts of the button used to switch between displays of the LCD cannot be accessed (again due to the PCB being fixed onto the battery holder), which makes it next to impossible to extend the switch to the front of a case. - The same is true for the on/off switch: It's not possible to easily affix cables for a switch placed in a case. - The LCD display is plugged onto the PCB, which makes it possible to relocate it so it is visible when the unit is put into a case, but as it is only affixed to the board with short pins, the display easily bends out of place while not fixed to a case. - For placement in a case it would also be useful if there were additional soldering points for the input power so the USB connector could be placed at a convenient location.
(The ratings for documentation and communication are arbitrary as they were required but I have no experience with them yet.)
My suggestion would be to deliver the "no headers" version as three separate parts, (i.e. PCB, battery holder, display) with the sticky pads in place but covered. This way would minimize the risk of breaking the product while customizing it for placement in a case and to also provide some additional solder points for the input power, the display switch and the on/off switch.
For starters, I just want to point out how fast the shipping was. I absolutely didn't expect that.
The next thing I didn't expect was it to be all assembled and ready to listen to rock. So I took it out, plugged it in, and boom! I've got some excellent flashing lights. So far as I can tell it's able to do everything as advertised in a very sleek and interesting enclosure.
Current circumstances (with COVID) caused a delay at the carrier but nothing the seller can do about that. Seller was great at following up on enquiries and communication generally was perfect. After reminding myself about adjusting the sensitivity with the resistor on the board had Pi driven music/light show in no time at all. Looking forward to playing with the light settings a bit more now
Sept. 3, 2020
Works well. "Full brightness" version is blindingly bright.
Today I received the ring (full brightness version) and soldered a 18650 Li-ion to it, although a smaller battery may do. It is blindingly bright, sufficient for being well seen in daylight shadow. The full brightness version may be a bit too much for a dim disco environment (unless you adjust brightness in the source code, recompile and download). A button is helping to switching between various preprogrammed light patterns and colors.
There is a tiny potmeter to adjust microphone sensivity. Medium sound level is required, even in the most sensitive setting. The micro is not very sensitive to rubbing the PCB on clothing, so you may wear the ring as a necklace.
Neither button nor potmeter are mentioned in the documentation.
Adjustable brightness, e.g. by long-pressing the button, may be a useful feature.
Response from MAT | Sept. 6, 2020
Thanks for your comment, Adrian.
You are right, the full brightness version may be too bright in some environments, and it would be useful to be able to modify it without having to recompile the source. I will add this feature soon in a new firmware version along wit more detailed documentation.