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Calcwriter pins

kaemori·calcwriter_blueprint·calcwriter_pins/calcwriter_pins.kicad_pcb

Calcwriter pins PCB layout, top view — open source board by kaemori

About the Calcwriter pins PCB

Calcwriter pins is an open source PCB design by kaemori, published on GitHub under the MIT license. It is a 2-layer board measuring 72 × 88.3 mm, with 20 components from 5 distinct parts.

Other key parts include the 0965-0-15-20-80-14-11-0. By type, the board carries 8 modules and 1 connector.

It belongs with the science & space designs in this gallery.

From the project

An external board that emulates inputs to the keypad matrix of a Sharp EL-W531S II Scientific Calculator.

A hardware board that emulates keypresses on the keypad matrix of a Sharp EL-W531S II calculator.

So uh, once upon a bus ride home, I had a brain blast — a year before, I made math equations that mimicked computer logic ops like AND, OR, NOT, etc. Then I got spicy and added stuff like SIGN, TOBOOL, and EQUALSTO. I even hacked together if statements and pseudo-loops! but... I couldn’t store variables (tragic).

Calcwriter pins, from the project README
From the project README

Main components on the Calcwriter pins

0965-0-15-20-80-14-11-0

Calcwriter pins bill of materials (BOM)

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

QtyPartRefs
8
0965-0-15-20-80-14-11-0
A0, A1, A2, A3, A4, A5, A6, A7
1
FH12-40S-0.5SH_55_
P1
8
0965-0-15-20-80-14-11-0
B0, B1, B2, B3, B4, B5, B6, B7
2
0965-0-15-20-80-14-11-0
CALC_NEG1, CALC_POS1
1
Conn_02x03_Odd_Even
ISP_HEADER1

Calcwriter pins design files

The KiCad project lives in the kaemori/calcwriter_blueprint repository on GitHub; these links point at the commit this page was built from.

Calcwriter pins: common questions

How big is the Calcwriter pins PCB?

The Calcwriter pins measures 72 × 88.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Calcwriter pins?

20 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 Calcwriter pins design files?

From the kaemori/calcwriter_blueprint 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 Calcwriter pins design in my own project?

Yes, under the terms of its MIT license, which kaemori chose for the repository.

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