Well, here it is. Gen 0 hardware:

Assembled hardware above, raw PCBs below:

It's too long to fit inside the saber, but I'm already working on a new revision that should fix that issue.

Hardware used in this version:

• Adafruit Feather nRF52840 Express
• Sparkfun level-shifting uSD Breakout (or you can use the non-level-shifting variety)
• Adafruit I2S Amplifier
• Sparkfun QWIIC Button
• Sparkfun VR IMU (Not used in firmware yet!)
• IRLB8721 N-Channel Power MOSFET (That's the TO-220 hiding under the Feather)
• Misc. connectors & wires
• Existing Blue LED from a donor saber
• Existing high-power resistor from a donor saber

Firmware (and therefore hardware features) have not progressed much since the last update. Instead, I've been trying to focus on hacking together an Android app to control the BLE side. For those with older phones, Bluefruit is an option, but it won't install on my phone, and nRF Connect is only vaguely usable. Once I get the hardware shrunken down enough to fit in a lightsaber hilt, I am going to need a much more usable app for demoing the prototype.

As for the schematic, I'm not committed to the hardware yet. I'm going to have to detour for a bit, juggle details, and then settle on a final circuit. You'll see some of the juggling when I post about the gen1 PCB.