# USB connector switch

**URL:** <https://forum.arduino.cc/t/usb-connector-switch/1154535>\
**Category:** UNO R4 WiFi\
**Created:** [August 3, 2023, 9:22am UTC](https://forum.arduino.cc/t/usb-connector-switch/1154535 "2023-08-03T09:22:15Z")\
**Posts on this page:** 1\
**Showing post:** 21

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**Author:** ![awneil](https://avatars.discourse-cdn.com/v4/letter/a/49beb7/32.png) [@awneil](https://forum.arduino.cc/u/awneil)\
**Post date:** [August 21, 2023, 8:48am UTC](https://forum.arduino.cc/t/usb-connector-switch/1154535/21 "2023-08-21T08:48:44Z")

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Another example of "Do Not Fit" parts not identified on schematic?

> [@Uno R4 schematic](https://forum.arduino.cc/t/uno-r4-schematic/1160263):
>
> Schematic shows 16mhz main oscillator crystal. This appears not fitted. Should that be indicared on schematic? 16mhz is too fast for PLL input, would 12mhz be better? Schematic shows USB\_VBUS detecting +5v. Should this be connected to VUSB?

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