# 6. Peripherals

Everything the robot talks to besides the PC and the tool: switches and sensors on its inputs, valves and lamps on
its outputs, the air for the pneumatic gripper, and the CAN bus for the electric grippers.

![The control board's connections to the outside world](https://docs.source-robotics.com/PAROL-docs/1.1/assets/IMG1.webp){ width="800" }

## In this chapter

- [Inputs and outputs](https://docs.source-robotics.com/PAROL-docs/1.1/06-peripherals/io/)
- [Pneumatics](https://docs.source-robotics.com/PAROL-docs/1.1/06-peripherals/pneumatics/)
- [CAN bus](https://docs.source-robotics.com/PAROL-docs/1.1/06-peripherals/can-bus/)

The electrical details of the connectors are in the [Control Board Manual](https://docs.source-robotics.com/PAROL-docs/1.1/board/06-io-and-estop/).