HardLabs

Graphical calculator

LayanJethwa·graphical-calculator·hardware/pcb/graphical-calculator.kicad_pcb

Graphical calculator PCB layout, top view — open source Raspberry Pi board by LayanJethwa

About the Graphical calculator PCB

Graphical calculator is an open source Raspberry Pi PCB design by LayanJethwa, published on GitHub. It is a 2-layer board measuring 90 × 155 mm, with 82 components from 5 distinct parts.

Its main chip is the RASPBERRY_PI_ZERO_2_W, from the Raspberry Pi family. By type, the board carries 40 diodes, 10 switches and 1 IC.

It belongs with the iot & wireless designs in this gallery.

From the project

Software and hardware for my custom-built graphical calculator

This design is for a graphical calculator that I am making, which will be able to plot graphs on a screen provided in human-readable infix notation.

I decided to make this as a fun maths-based project for my Computer Science NEA.

Graphical calculators and software are widely used in advanced mathematics. They are an easy way to visualise and analyse graphs and are useful in a classroom setting as well as to verify solutions to problems. Free digital softwares such as Desmos and Geogebra are used extensively, but they work best on computers, and it is not desirable to have them on phones…

Graphical calculator, from the project README
From the project README

Main components on the Graphical calculator

RASPBERRY_PI_ZERO_2_W

Graphical calculator bill of materials (BOM)

82 components, 5 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
RASPBERRY_PI_ZERO_2_W
U2
10
B3F-1050
SW0, SW1, SW2, SW3, SW4, SW5, SW6, SW7 +2
30
B3F-1050
SWAC1, SWCOS1, SWDEL1, SWDIV1, SWDOT1, SWDOWN1, SWEXE1, SWFRAC1 +22
1
JS102011CQN
SWRAD1
40
D
D1, D2, D3, D4, D5, D6, D7, D8 +32

Graphical calculator design files

The KiCad project lives in the LayanJethwa/graphical-calculator repository on GitHub; these links point at the commit this page was built from.

Graphical calculator: common questions

What microcontroller does the Graphical calculator use?

The Graphical calculator is built around the RASPBERRY_PI_ZERO_2_W, from the Raspberry Pi family.

How big is the Graphical calculator PCB?

The Graphical calculator measures 90 × 155 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Graphical calculator?

82 components, from 5 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Graphical calculator design files?

From the LayanJethwa/graphical-calculator repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Graphical calculator design in my own project?

The repository has no license, so all rights stay with LayanJethwa. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Graphical calculator without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Raspberry Pi firmware against it before you order a PCB.

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