30 lines
1.4 KiB
Markdown
30 lines
1.4 KiB
Markdown
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There are a total of six solderjumpers on the board:
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# switching to the barrel jack as voltage supply
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*JP3* and *JP4* set the source for the supply voltage.
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*JP4* connects the voltage input to the barrel jack, *JP4* connects it to the USB +5V rail.
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Per Default JP4 is closed and JP3 is open, making the default way of supplying voltage the USB jack.
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If the Barrel Jack should be used, then **JP4 has to be opened first** by cutting the trace which shorts it by default, otherwise **the USB voltage will be shorted with the barrel jack, causing potential damage to the USB port**.
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Afterwards, *JP3* can be closed with a small blob of solder.
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# activating the equalizer
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*JP1* and *JP2* connect the output of the Audio switching part of the Rohm chip.
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When left in the default setting, they will connect them to the output jack directly, bypassing the Equalisation part of the chip completely.
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By selecting the other possible path, the equalisation circuit becomes usable. For this to work,
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*JP7* and *JP8* have to be closed with small solder blobs as well, since those connect the equalizers
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output to the output audio jack.
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# Assembling the rest
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For assembly of the board, check the [documentation folder](../doc). It contains the (interactive bill of materials)[../doc/interactive_placement.html],
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which indicates what components go where.
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Also take a look at the [BOM](../doc/BOM.xlsx) for what components can be sourced where.
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