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README: Add Info about pin 11 (3V3 in)

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Felix Kunsmann 2017-06-14 22:31:09 +02:00
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README.md
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@ -7,20 +7,24 @@ While it does have a 40pin GPIO connector, it will also work with older
26-pin variants of the Pi.
The board was created to provide a convenient interface for two
[Octoprint](http://octoprint.org/) plugins: PSUControl and LCD-HD44780 (See
links on bottom of this page).
[Octoprint](http://octoprint.org/) plugins:
[PSUControl](https://github.com/kantlivelong/OctoPrint-PSUControl) and
[LCD-HD44780](https://github.com/Kunsi/Octoprint-LCD-HD44780) (See links on
bottom of this page).
![Board](img/top.jpg?raw=true)
The board itself offers a variety of features:
* Powering the Pi using +5VSB (standby power)
* Switching the PSU on and off using GPIO Pin 12
* Switching the PSU on and off using GPIO pin 12
The GPIO pin can be connected to PS_ON directly, or via a transistor. This is
choosable using the three-pin jumper switch.
Alternatively, the PSU can be forced to be on, by using the 2-pin PS_ON
jumper.
* Providing a "is the PSU on"-detection by wiring GPIO pin 11 to the 3v3 rail
of the PSU
* Connecting a character LCD to the Pi
LCD is wired as follows:
@ -72,5 +76,6 @@ GPIO connector | 1 | 0.11 | [https://de.aliexpress.com/…/32454935478.
ATX connector | 1 | 0.43 | <http://www.mouser.de/ProductDetail/TE-Connectivity/1-1775099-3/>
## Links
* [Octoprint](http://octoprint.org/)
* [OctoPrint-PSUControl](https://github.com/kantlivelong/OctoPrint-PSUControl) by kantlivelong
* [Octoprint-LCD-HD44780](https://github.com/Kunsi/Octoprint-LCD-HD44780) by Kunsi