My boss is going to be out of town for 3 weeks so I may just use the office printer to make this happen.
Was checking the schematic, nice notes! I would have sprung for a regulated -9V using a dedicated switched cap doubler chip (they're cheap, 1x of these to invert, 1x to double) and a LDO follower.
It would save on a lot of the discrete components used, I am not a fan of running open-loop voltage supplies.
I have no idea what planar magnetic means, but it sounds impressive.
Just based on the name, I'd guess headphones with flat magnets. I never knew this was something I needed in my life. I'm tired of those spherical magnets controlling everything!
How to Geek has a good write up.
TL;DR - it's a different way to make sound waves that can be extremely responsive and low distortion at higher volumes at the expense of weight and a more flat response curve.
Really cool seeping ploopy.co expanding their offerings. I've wanted to get a Ploopy trackball for a while now.
Those look so rad. Huge respect to the person /people who put the work into making those. Makes me wish I had more 3d printing/fabrication knowledge...
I wonder how easy it would be to modify these to get them to be clip on ear phones. Maybe the drivers would be a bit too big as standard to make ones that could conformably hang on your ears
