Hardware Architecture ​

CoderBot is based on Raspberry Pi computer, equipped with a contorl board "hat".

The Raspberry is powered by a lithium-ion powerbank and is connected to an USB microphone, a speaker via the 3.5" audio jack and to the camera module via the CSI port.

Raspberry Pi ​

CoderBot has been tested with the following Raspberry Pi models:

• Model B 3
• Model B+ 3
• Model A+ 3

No tests has been done with Model B 4, Compute Module 4 and Zero W 2, although they should be compatible with the software.

Micro-SD card ​

The micro-sd card must have at least 8GB capacity. Class 10 cards are recommended.

Camera module ​

The camera used is the standard Raspberry Pi camera module "v1" (5 megapixel). The "v2" camera can also be used, as well as special infrared versions.

Control board ​

The control board contains logic to accomplish the following:

• control motors (DC, PWM)
• control two servos (PWM)
• read encoder data from motors
• control and read ultrasonic sensors
• read MPU (accelerometer/gyroscope/compass) data
• read/write data to the on board atmega328

Microphone ​

The microphone can be any device with an USB connection.

Speaker ​

The speaker is connected to the 3.5" headphones output, it must be an amplified speaker with > 1 Watt.

Battery ​

The battery used is a powerbank with a nominal capacity of 10000mAh and two separate USB outputs, each with 2A nominal output current.

The battery must have separate outputs and a rather large capacity to sustain the peak consumption caused by starting the motors and at the same time supply 5V, 1A to the Raspberry Pi, without any interruptions.