> For the complete documentation index, see [llms.txt](https://makermoekoe.gitbook.io/picoclick-c3/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://makermoekoe.gitbook.io/picoclick-c3/extension-boards/pir-sensor.md).

# PIR sensor

The PIR sensor extension board is based on the **EKMB1107112** by Panasonic. It has an ultra low power voltage regulator on board. The output of the PIR sensor can be used to activate the Picoclick.

There is a soldering jumper on the board which will bridge the input of the voltage regulator with its output. If the sensor is able to work with up to 4.2V then the voltage regulator may be omitted and the jumper can be closed.

## Hardware

### Overview

<figure><img src="/files/Ygr8ORw2WqRI75PzJ59E" alt=""><figcaption></figcaption></figure>

<figure><img src="/files/3fnIAyPsXVFexhDGDnly" alt=""><figcaption></figcaption></figure>

### Technical drawing

<figure><img src="/files/VchtVzwGEpcOMrwwrR9W" alt=""><figcaption><p>Measurements in mm, grid is 0.5mm</p></figcaption></figure>

* PCB: 18mm x 18mm
* Thickness: 1mm
* Mounting holes: 3.2mm
* Corner radius: 2mm

### Schematics

<figure><img src="/files/GyIul2vV7nFZRlaMr6JB" alt=""><figcaption></figcaption></figure>

## Software

Coming soon.