# PHAT DAC Which GPIO are in use

**URL:** <https://forums.pimoroni.com/t/phat-dac-which-gpio-are-in-use/1388>\
**Category:** Support\
**Created:** [December 15, 2015, 5:55pm UTC](https://forums.pimoroni.com/t/phat-dac-which-gpio-are-in-use/1388 "2015-12-15T17:55:52Z")\
**Posts on this page:** 1\
**Showing post:** 10

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**Author:** ![Terry](https://avatars.discourse-cdn.com/v4/letter/t/b9e5f3/32.png) [@Terry](https://forums.pimoroni.com/u/Terry)\
**Post date:** [December 30, 2015, 12:14pm UTC](https://forums.pimoroni.com/t/phat-dac-which-gpio-are-in-use/1388/10 "2015-12-30T12:14:33Z")

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So, for anyone still not sure, we just need 7 out of the 40 pins.  
(right?)

1. Pin 1 (3.3V)
2. Pin 2 (5V)
3. Pin 12 (GPIO 18)
4. Pin 35 (GPIO 19)
5. Pin 38 (GPIO 20)
6. Pin 39 (Ground)
7. Pin 40 (GPIO 21)

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