Last Updated or created 2025-09-27
While watching TV, I drew some schematics for the YM2203 player.
For another project, I was researching the best way to get the voltage levels perfect for below analogue input.
(See the little red breadboard in the right picture above! )
Damn, I couldn’t do this stuff in school. Tried to forget it all … now I need it!
Top of this image shows what I want to accomplish. Audio or other input which has negative values also, convert to another voltage range to be read by analog read on an Wemos. These can only read 0-3v3