Celluon Magic Cube laser keyboard
Laser projection keyboard from 2011 manufactured by Celluon. This company does not seem to exists anymore, at least its webpage is dead.
While it cannot fully replace regular keyboard, it might be convenient for some mobile devices or simply for testing Bluetooth and it is definitely a conversation piece.
Given its age it is no surprise that battery has degraded, notably self-discharging in two or three weeks after the charge and it has to be swapped.
FCC has published internal photos of this device: Internal-Photos-1443402.pdf, though it was not clear for me how to disassemble this.
Back: on/off switch, mini USB, Bluetooth HID/SPP switch.
Side panels are glued with thin double sided tape and need to be removed first before unlatching the back.
ATtiny13A
LTC4055: USB power manager and Li-Ion battery charger.
CLM6520R SoC.
583040 LiIon cell, slightly bloated.
Back of the board: CSR BC417 Bluetooth module.
EN25QH16: 16 Mbit SPI flash.
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