AT89C2051 is PT2258 master volume control, digital control, infra-red remote control, 2.1/5.1 sources choice), including a full set of schematics, source, the HEX file

PT2258
......\Remote.dwg
......\SC6121AZ.pdf
......\SC6122AZ.pdf
......\y22.doc
......\yds25e4c.asm
......\Yds25e4c.hex
......\YDS320-02SCH
......\YDS320-03SCH
......\YDS560-04SCH

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