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What is required to build a Sound Input board for my IIgs?

April 26, 2017build IIgs input sound

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What is required to build a Sound Input board for my IIgs?

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I found the following circuit on ground (as text) in the file digitizer.circuit at … ftp://ground.ecn.uiowa.edu/apple2/MiscInfo/Hardware/ [quote] If you don’t mind putting together a few parts, you can build your own adapter, though (explanation follows): GS Analog 10-500 uF In —————+————+—-+————||—— >> | | | -+- -+- + To CD player, 5V Zener /_\ Signal /_\ = 1.5V microphone, diode | Diode | – Battery etc. GS | | | Ground ————-+————+—-+——————– >> [end quote] I changed it to this: GS Analog 100 uF In ————+———–+—-+———-+——-||—– >> | | Z + -+- -+- +——+ Z 10K To CD player, 5V Zener /_\ Signal /_\ = 3V Z Z microphone, diode | Diode | – Bat Z<--+ etc. GS | | | Z 10K pot Ground ----------+-----------+----+------+------------------ >> The Ensoniq is designed to handle 0 to 2.5V input, but audio sources usually swing more or less equally +/- about zero. Therefore we need a level shifter, to put the

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I found the following circuit on ground (as text) in the file digitizer.circuit at … ftp://ground.ecn.uiowa.edu/apple2/MiscInfo/Hardware/ [quote] If you don’t mind putting together a few parts, you can build your own adapter, though (explanation follows): GS Analog 10-500 uF In —————+————+—-+————||—— >> | | | -+- -+- + To CD player, 5V Zener /_\ Signal /_\ = 1.5V microphone, diode | Diode | – Battery etc.