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Gold Prospecting
Do It Yourself (DIY) Projects
(DIY) F1A4 Simple Mod information (hope it helps)
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<blockquote data-quote="AuMan" data-source="post: 104793" data-attributes="member: 2670"><p>Many of the class d amp modules found on ebay require 5v power input. I would not recommend running the amp from the 5v power rails in the detector as it will draw a fair amount of extra current compared to what the rest of the circuits use, drop the rail voltage and upset the stability of the machine. </p><p>Probably best to power the amp externally. You can run them from a 3.7v li-ion battery, or there are small power modules that boost the 3.7v to 5v. If you power it from the same power source as the detector you will need to use an audio isolation transformer for the audio input to the amp.</p><p></p><p>AuMan</p></blockquote><p></p>
[QUOTE="AuMan, post: 104793, member: 2670"] Many of the class d amp modules found on ebay require 5v power input. I would not recommend running the amp from the 5v power rails in the detector as it will draw a fair amount of extra current compared to what the rest of the circuits use, drop the rail voltage and upset the stability of the machine. Probably best to power the amp externally. You can run them from a 3.7v li-ion battery, or there are small power modules that boost the 3.7v to 5v. If you power it from the same power source as the detector you will need to use an audio isolation transformer for the audio input to the amp. AuMan [/QUOTE]
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Gold Prospecting
Do It Yourself (DIY) Projects
(DIY) F1A4 Simple Mod information (hope it helps)
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