# User guide

Pakronics® sells Otto-DIY robots with Arduino ***Nano Every*** boards. While both boards and pin-wise compatible, there are few differences between the two Arduino variants, as listed below:

| Parameter | Arduino Nano | Arduino Nano Every |
| --------- | ------------ | ------------------ |
| Processor | ATmega328P   | ATmega4809         |
| Flash     | 32KB         | 48KB               |
| SRAM      | 2KB          | 6KB                |
| EEPROM    | 256B         | 1024B              |

## Otto Kit variants:

Otto-DIY Robot Kits are available in the following four variants depending upon the mechanical and electronic components:

| Parts \| Variants | Maker | Maker+ | Humanoid | Eye/LED |
| ----------------- | ----- | ------ | -------- | ------- |
| Arduino           | X     | X      | X        | X       |
| Shield            | X     | X      | X        | X       |
| Servos            | 4     | 4      | 6        | 4       |
| Buzzer            | X     | X      | X        | X       |
| Switch            | X     | X      | X        | X       |
| Ultrasonic Sensor | X     | X      | X        |         |
| Touch Sensor      |       | 3      | 1        | 1       |
| Sound Sensor      |       | X      | X        |         |
| Bluetooth         |       | X      | X        |         |
| LED Matrix (8x8)  |       |        | X        |         |
| LED Matrix (16x8) |       |        |          | X       |

## Connection of components – Otto Robot Assembly

Across all the four variants of Otto-DIY Robots, buzzer, switch and Servos are common. Following the connection guide:

* Servos
  * 4 servos for foot and legs are connected to pin 2, 3, 4 and 5 respectively
  * 2 servos for hands (Humanoid only) are connected to pin 6 and 7
* Buzzer is connected to pin 13
* Battery switch is connected with Vin and Ground to supply the Arduino board through battery power.
* Ultrasonic sensor is connected to pin 9 (Maker, Maker+ and Humanoid)
* Sound sensor is connected to Analog pin A6 (Maker+ and Humanoid only)
* Touch sensor is connected to Analog pin A0 (Maker+, Maker-Eye and Humanoid)
* 8x8 LED matrix uses pin A1, A2 and A3 (Humanoid only)
* Accelerometer / Gyro uses pin A4 and A5 (Humanoid only)
* 16x8 LED matrix is connected to I2C port (Eye only)

![](/files/-M-hMuadnJl1VX7-5hxC)

{% file src="/files/-MCK-sd2bzxFU3kfPpmj" %}


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