# Polarity of the resistor arrays in core LPC 17

**URL:** <https://forum.midibox.org/t/polarity-of-the-resistor-arrays-in-core-lpc-17/16028>\
**Category:** MIDIbox HUIs\
**Created:** [December 2, 2011, 3:45pm UTC](https://forum.midibox.org/t/polarity-of-the-resistor-arrays-in-core-lpc-17/16028 "2011-12-02T15:45:36Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![chapelier\_fou](https://forum.midibox.org/user_avatar/forum.midibox.org/chapelier_fou/32/10759_2.png) [@chapelier\_fou](https://forum.midibox.org/u/chapelier_fou)\
**Post date:** [December 2, 2011, 3:45pm UTC](https://forum.midibox.org/t/polarity-of-the-resistor-arrays-in-core-lpc-17/16028/1 "2011-12-02T15:45:36Z")

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Hi, i have a doubt on how to solder the R2 and R33 on the core module. what does “appr. square pad” ? like the closest corner ? In other terms, looking at the photos, dot of R33 is left, dot of R2 is right ?

Thanks !

louis

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**Author:** ![Shuriken](https://forum.midibox.org/user_avatar/forum.midibox.org/shuriken/32/149_2.png) [@Shuriken](https://forum.midibox.org/u/Shuriken)\
**Post date:** [December 2, 2011, 4:19pm UTC](https://forum.midibox.org/t/polarity-of-the-resistor-arrays-in-core-lpc-17/16028/2 "2011-12-02T16:19:25Z")

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The dot is always pin 1. That should be soldered in the square pad. The rest of the pads are round.

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**Author:** ![chapelier\_fou](https://forum.midibox.org/user_avatar/forum.midibox.org/chapelier_fou/32/10759_2.png) [@chapelier\_fou](https://forum.midibox.org/u/chapelier_fou)\
**Post date:** [December 2, 2011, 5:54pm UTC](https://forum.midibox.org/t/polarity-of-the-resistor-arrays-in-core-lpc-17/16028/3 "2011-12-02T17:54:17Z")

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That’s clear. Thaaaanks.