Zuw 1R5 1215
(how you like that antique and rare ruler)
You don't really need the converter, i like regulated everything so
i use it. a 8 x AA brick is 12 volts and runs the thing for about 10 hours.
If you use 10 x powerex Nimh AA you get about 20 hours.
Yes that is real size .9 x .9 inch.
You solder the chip thru the backside of the board then solder
on a piece of copper that is .3 inch wide and about 1 inch long.
Why build it. Sounds great and is sjosae tiny. I mean really tiny.
High end? For high impedance phones, sound is amazing for such
a little squirt. Low impedance phones, seriously lacking.