Hey team,
I'm about 95% of the way done with the design on the (open-source) Helium supercapacitor-powered portable speaker. It works great if you plug it in the right way...
But the reverse polarity protection I put in seems to not work, i.e. when connected in reverse the N-CH MOSFET that should block the negative side smokes.
(12V common cathode zener should limit Vgs to 12V ish.)
I'm pretty sure I'm just being dumb...does anyone see how?
https://github.com/blueshiftPDX/Helium/releases/tag/1-2
THANKS A TON.
I'm about 95% of the way done with the design on the (open-source) Helium supercapacitor-powered portable speaker. It works great if you plug it in the right way...
But the reverse polarity protection I put in seems to not work, i.e. when connected in reverse the N-CH MOSFET that should block the negative side smokes.
(12V common cathode zener should limit Vgs to 12V ish.)
I'm pretty sure I'm just being dumb...does anyone see how?
https://github.com/blueshiftPDX/Helium/releases/tag/1-2
THANKS A TON.