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Update hardware_overview.md
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bboyho committed Aug 27, 2024
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Expand Up @@ -435,7 +435,7 @@ There are a few jumper pads available on the bottom of the board.
* **JP2** — By default, this jumper is closed. Cut this trace to disable the user LED that is connected to pin `18`.
* **JP3** — By default, this jumper is closed. Cut this trace to disable power connected to the WS2812 addressable LED's 3.3V pin.
* **CUR** — This three way jumper sets the charge IC's charge rate. By default, it's connected to the pad labeled **500** so the charge rate is set to 500mA. Cutting a trace and adding a solder jumper between the center pad and the pad labeled as **100** will set the charge rate to 100mA.
* **I2C** &mdash; By default, this three-pad jumper is closed and located on the bottom of teh board. The three way jumper labeled I2C connect the two 2.2k&ohm ;pull-up resistors to the I<sup>2</sup>C data and clock lines. If multiple devices are connected to the bus with the pull-up resistors enabled, the parallel equivalent resistance will create too strong of a pull-up for the bus to operate correctly. As a general rule of thumb, [disable all but one pair of pull-up resistors](https://learn.sparkfun.com/tutorials/i2c/all#i2c-at-the-hardware-level) if multiple devices are connected to the bus.
* **I2C** &mdash; By default, this three-pad jumper is closed and located on the bottom of the board. The three way jumper labeled I2C connect the two 2.2k&ohm; pull-up resistors to the I<sup>2</sup>C data and clock lines. If multiple devices are connected to the bus with the pull-up resistors enabled, the parallel equivalent resistance will create too strong of a pull-up for the bus to operate correctly. As a general rule of thumb, [disable all but one pair of pull-up resistors](https://learn.sparkfun.com/tutorials/i2c/all#i2c-at-the-hardware-level) if multiple devices are connected to the bus.
* **SDPC** &mdash; By default, this jumper is closed and for the microSD card's power control circuit. Cut this trace on the **GND/ON** side to disable power to the microSD card's socket. For users that want to control the transistor via a GPIO, add a solder blob between the center pad and the pad that is labeled **17**. Make sure to also define the pin in code to toggle power to the microSD card.

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