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3D TV, High Definition Television, HDTV 4K and AV
Hi Fi section
Second life for a good old car stereo
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<blockquote data-quote="4wd" data-source="post: 1057125" data-attributes="member: 393358"><p>Yes, lots of interactions in these modern ages. The car it was removed from had just speakers & a rear camera, no problems afaik.</p><p></p><p></p><p>measured the 'sleeping brain' current draw, only 2,5 mA. And the 9v test shows it retains memory even when voltage drops low below 12v. So nothing critical. Must think of some system with relay or switch, completely disconnecting the main 12v supply cable while instantly connecting to whatever memory battery I may opt for (depending of wanting to keep settings for minutes or months).</p><p></p><p>Anyway, resetting the unit (eq and a few more things) takes less than 30 seconds, so no big deal even without the memory battery. Just nice to fiddle with things and make up something that works and is useful :O)</p></blockquote><p></p>
[QUOTE="4wd, post: 1057125, member: 393358"] Yes, lots of interactions in these modern ages. The car it was removed from had just speakers & a rear camera, no problems afaik. measured the 'sleeping brain' current draw, only 2,5 mA. And the 9v test shows it retains memory even when voltage drops low below 12v. So nothing critical. Must think of some system with relay or switch, completely disconnecting the main 12v supply cable while instantly connecting to whatever memory battery I may opt for (depending of wanting to keep settings for minutes or months). Anyway, resetting the unit (eq and a few more things) takes less than 30 seconds, so no big deal even without the memory battery. Just nice to fiddle with things and make up something that works and is useful :O) [/QUOTE]
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3D TV, High Definition Television, HDTV 4K and AV
Hi Fi section
Second life for a good old car stereo
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