[NOTES]

Sound Card - Obsolete Hardware Revisions

Sound Card Hardware Ver 2 (r3) 2/3/2018	NOTES Version 2 changed the amplifier to a 10 watt Maxim 9768 (up from 2.6 watts in Version 1), and also adds a reverse-polarity protection diode. Version 2 and later removes the SD flash memory chip from Version 1 which was never utilized (or needed). Version 2 does not have lights or servo outputs. Eagle Board and Schematic V2 (zip) Printable Schematic (8.5x11 PDF) Drawing: Board Top - Board Bottom Bill of Materials - PDF - Excel Bare boards at OSH Park (Note you can also buy your Teensy 3.2 from OSH Park on checkout) Solder paste stencils at OSH Stencils Gerber files formatted for SEEED Studio PCB service for those who don't want to go through OSH Park
Sound Card Hardware Ver 1 4/10/2017	NOTES Version 1 featured a 2.6 watt LM48310 amplifier, which some users found inadequate; it does however also include a line-out connector for use with an external amplifier. Version 1 also includes an SD flash memory chip (in addition to the micro-SD external memory card), however the flash memory was never implemented or used. Version 1 does not have lights or servo outputs. Eagle Board and Schematic V1 (zip) Printable Schematic (8.5x11 PDF) Drawing: Board Top - Board Bottom Bill of Materials - PDF Bare boards at OSH Park (Note you can also buy your Teensy 3.2 from OSH Park on checkout) For a solder stencil upload the Eagle ".brd" file to OSH Stencils Gerber files formatted for SEEED Studio PCB service for those who don't want to go through OSH Park