04:33 Nao-Min (Mechanism part) The mechanism part was completed. The substrate of the oscillator is produced later. 0
04:33 Nao-Min 2 (musical gadget like theremin) The oscillation circuit board was built into the pipe. 0
04:33 Nao-min 2012 “Nao-min” is musical gadget. like a “THEREMIN” The basic circuit of LM358. LM4818 amplifier. 0