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D/A converter - Revision history
2026-07-27T03:29:15Z
Revision history for this page on the wiki
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https://www.temlib.org/AtariForumWiki/index.php?title=D/A_converter&diff=12382&oldid=prev
>Wongck at 03:21, 19 February 2012
2012-02-19T03:21:50Z
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>Wongck
https://www.temlib.org/AtariForumWiki/index.php?title=D/A_converter&diff=12381&oldid=prev
>Wongck at 15:26, 10 October 2011
2011-10-10T15:26:34Z
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>Wongck
https://www.temlib.org/AtariForumWiki/index.php?title=D/A_converter&diff=12380&oldid=prev
>Simonsunnyboy at 06:39, 21 February 2007
2007-02-21T06:39:00Z
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<p><b>New page</b></p><div><pre><br />
3. HOW TO MAKE AN EVEN CHEAPER D/A<br />
─────────────────────────────────────────────────────────<br />
<br />
For the price of 20 1% resistors and a plug, with no power supply<br />
needed you can make a D/A converter that sounds close to the IC<br />
one above (it seems only the UK can get a Plessey ZN426E)<br />
<br />
You need one plug for your amp, one for your parallel port and<br />
9 20k and 9 10K resistors<br />
Use 1% resistors if possible ─ and 20k sound much better than 22k<br />
<br />
Printer Port:<br />
<br />
signal pin 20k 20k<br />
D0 2 >───░░░─┬─░░░──0v<br />
20k â–‘ 10k<br />
D1 3 >───░░░─┤<br />
20k â–‘ 10k<br />
D2 4 >───░░░─┤<br />
20k â–‘ 10k<br />
D3 5 >───░░░─┤<br />
20k â–‘ 10k<br />
D4 6 >───░░░─┤<br />
20k â–‘ 10k<br />
D5 7 >───░░░─┤<br />
20k â–‘ 10k<br />
D6 8 >───░░░─┤<br />
20k â–‘ 10k<br />
D7 9 >───░░░─┤<br />
20k â–‘ 10k 100nF<br />
├──────┤█────> TO AMPLIFIER<br />
â–‘ 10k<br />
GND 20 >───────┼────────────><br />
0v<br />
<br />
Thanks to Harry Stox for the above circuit. Again, make sure all<br />
the 0v lines are connected together. The 100nF capacitor may not<br />
be needed, try removing it if this circuit sounds poor.<br />
</pre></div>
>Simonsunnyboy