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This page documents features from more engineering point of view. For a more user-centric point of view, see Features.


Major Balthazar parts are:

Power Controller and battery

These supply power to the rest of the system, particularly the System on a Module, USB Hub and Display subsytem. It also manages battery.

It should be capable enough to run some USB connected hardware.

See more: Power Supply

System on a Module (SoM)

This is the main system board, the computer. Boards from different makers should be supported.

Minimum of ports is required for wider compaitibility. These are: Power, USB and HDMI.

See more: System on a Module

I/O USB hub

IO-board basically means connectivity with peripheral devices. These can be seen as on-board and out-board. On-board devices include: keyboard + trackpad, webcam and optional audio-card. USB is the usual solution for this.

For more see our I/O USB page.


Single PCB solution for connecting the three previously designed Balthazar modules (I/O, power supply, USB 2.0, 3.0 controllers, keyboard and adding Compute Module compatible FPGA boards. For more info see our Unifying-PCB page.

Display Controller and a screen panel

Provides interface to display panel by HDMI

Panel slim screen.

Resolution: 1920 x 1080

Aspect Ratio: 16:9

Pixel Pitch(mm): 0.1529 x 0.1529

PPI: 166

Active Area(mm): 294.06 x 165.54

Outline(mm): 299.96 x 186.92

Luminance(nits): 300

View Angle (U/D/R/L): 89/89/89/89

Contrast Ratio: 800:1

Support colour: 16.7M

Colour Depth: 8 bit

Colour Gamut (NTSC): 72%

Response Time(ms): 25

Power consumption: 3.7

Backlight: LED

Weight: 170 g

Frame Rate: (Hz)60Hz

Electrical Interface: DP 1.3

Ultra-slim thickness: 2mm

Test screen on Unifying Board with CM4 module working. Also works in a full configuration.


Initial casing is meant to be made of a recyclable vegetable oil based plastic. Also the idea of a modular design gave us even more sustainable materials to look at - pressed used clothes in resin, cans recycled pressed aluminium and even resin-ed wood saw.

Here are elements we have been working with so far and slowly shaping the final design and a certain materials together.

On our Github page you can look into the .stl files too.

Chronological pictures and a phases of the development:

Keyboard and Touch-pad

See more: Keyboard


We did implementation and tests with this battery set:

Brand: Samsung

Battery size: 21700

Battery chemistry: Li-ion

Battery: Rechargeable

Voltage 3.6V

Min. capacity in mAh: 4,800.00

Battery version: Flat top

Discharge current: 9.60

Protection circuit: Unprotected

Height: 70.00

Diameter in mm: 21.00

Battery implementation and tests. Charging and operating.

OLED small screen for keyboard

OLED Module: display OLED



33x20mm - 0.91"


Software depends on a System on a Module used.

See more: Software

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