> For the complete documentation index, see [llms.txt](https://learn.arduinosa.co.za/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://learn.arduinosa.co.za/arduino-robot-car/arduino-bluetooth-car/circuit-diagram.md).

# Circuit Diagram

The entire Circuit will be as below:

<figure><img src="https://451694785-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MPda5vaSVRKTQ6AoAmb%2Fuploads%2FWPiRjHC2Ku9DqLwjStib%2F4wd%20bluetooth%20car%20-%20fritzing.png?alt=media&amp;token=2e7b0da4-ff1a-48ec-8526-13bb20584d4d" alt=""><figcaption></figcaption></figure>

The 2 Left motors will connect to Motor A on the driver board

The 2 Right motors will connect to Motor B on the driver board

A 2 X 18650 battery pack **positive** will be connect to the **VSS / 12V** terminal on the driver board and the **negative** will be connected to the **GND** terminal on the driver board.

The Arduino board will be powered by the same 2 x 18650 battery pack. Connect a jumper from the **VSS / 12v** terminal on the motor board to the **VIN** on the Arduino board. Connect another jumper from the **GND** on the motor driver to **GND** on the Arduino board

The Motor driver will be connected to the Arduino board as per below connections:

* Motor driver ENA -> PIN 9 on Arduino Board
* Motor driver IN1 -> PIN 8 on Arduino Board
* Motor driver IN2 -> PIN 7 on Arduino Board
* Motor driver ENB -> PIN 3 on Arduino Board
* Motor driver IN3 -> PIN 5 on Arduino Board
* Motor driver IN4 -> PIN 4 on Arduino Board

The bluetooth module will be connected to the Arduino board as per below connections:

* Bluetooth VCC -> 5v on Arduino Board
* Bluetooth GND -> GND on Arduino Board
* Bluetooth TX > PIN RX on Arduino Board
* Bluetooth RX -> PIN TX on Arduino Board