> For the complete documentation index, see [llms.txt](https://docs.idew.org/code-internet-of-things/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.idew.org/code-internet-of-things/tutorials/meet-your-iot-kit/1.2-other-components.md).

# A-2 Other Components

{% hint style="success" %}
**GOAL:**  Identify the other components in your Photon kit and their purposes (inputs, outputs, connectors, and cables)

**TASK:**  Review the information below, and then complete [this assignment](https://drive.google.com/open?id=1op5CGn4ZSe-FFW_nTxTW_Yz_FeZpcXrW0pxKeu_eFF0) by finding each component in your Photon kit & identifying its name and function.
{% endhint %}

## Physical Inputs

Your Photon kit includes these physical inputs, which can be connected to your circuit board:

* **Push Buttons** – detects if button is being pushed (kit has red, yellow, green & blue buttons)
* **Trimpot Dial** – detects position of dial (can be turned clockwise or counter-clockwise)
* **Motion Sensor** – detects if something is moving in nearby environment
* **Magnetic Switch** – detects if something is open or closed (such as door, window, etc.)
* **Photocell (Light Sensor)** – measures amount of light in environment
* **Humidity & Temperature Sensor** – measures relative humidity & temperature of air
* **Soil Moisture Sensor** – measures amount of moisture in soil (or similar material)
* **Accelerometer** – measures acceleration or tilt in 3 dimensions; can also detect taps or bumps

The following is **not** a standard part of the Photon kit, but your teacher may have added it:

* [**Ultrasonic Sensor**](https://www.sparkfun.com/products/13959) – measures distance to nearest object

## Physical Outputs

Your Photon kit includes these physical outputs, which can be connected to your circuit board:

* **LED Lights** – produces light (kit has red, yellow, green & blue LED lights)
* **Speaker** – produces sound (tone) at any frequency from 20Hz to 20kHz
* **Servo Motor** – rotates to any angle from 0° to \~180°
* **Micro OLED Display** – displays text and simple graphics in monochrome

## Connectors

Your Photon kit includes these components to help connect inputs and outputs to your circuit board:

* **Breadboard** – provides additional pins to help connect and power your inputs and outputs
* **Jumper Wires** – help connect inputs and outputs to pins on breadboard and circuit board
* **Resistors** – help limit electric current for certain inputs or outputs (such as LED lights, etc.)

## Power Cables

Your Photon kit will include one or more cables to provide power to your circuit board:

* **USB to Micro-USB Cable** – powers circuit board by connecting to USB port or charger
* **9V to Barrel Jack Adapter** – powers circuit board by connecting to 9V battery

Only **one** power source (Micro-USB or Barrel Jack) needs to be connected.

{% hint style="info" %}
**USB to Barrel Jack:**  SparkFun sells a [USB to Barrel Jack Adapter cable](https://www.sparkfun.com/products/8639) which is a great alternative to the cables included in the kit. This cable connects a USB port (computer, charger, etc.) to the barrel jack. If using this cable, the Photon's VIN pin will supply \~5 volts.
{% endhint %}

## More Info

The product page for the [SparkFun Inventor's Kit for Photon](https://www.sparkfun.com/products/13320) provides links to details about each part included in the kit. (Click the "**Includes**" tab on the product page to see the links to the parts.)