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Displaywriter usb

BASLQC·xwhatits-capsense-controller·schem/displaywriter-usb.kicad_pcb

Displaywriter usb PCB layout, top view — open source AVR/Arduino board by BASLQC

About the Displaywriter usb PCB

Displaywriter usb is an open source AVR/Arduino PCB design by BASLQC, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 119.8 × 32.5 mm, with 38 components from 21 distinct parts.

Its main chip is the ATMEGA32U2, from the AVR/Arduino family. Other key parts include the DAC101S101, LM339A and 74AHC595. By type, the board carries 12 capacitors, 9 resistors, 6 ICs, 3 connectors, 2 switches and 1 crystal.

It belongs with the keyboards designs in this gallery.

From the project

A GPLv3 Keyboard Controller created by xwhatit from Geekhack for IBM Model F and Beamspring capacitive keyboards. Archived by the BASLQC on Github.

Xwhatit at Geekhack has developed a set of USB controllers for the IBM capacitive keyboards (Model F and Beamspring). These allow keyboards that otherwise have no way to hook them up to a modern PC to be used (Beamsprings), offer an alternative to Soarer's excellent converter (standard Model Fs), and also an alternative to the other intriguing capsense project around, the DPH controller. It allows the potential to go a bit further than just a converter if you're trying to do something a bit unusual—like build your own keyboard using old Model F bits, add extra keys that the original…

Main components on the Displaywriter usb

ATMEGA32U2DAC101S101LM339A74AHC595

Displaywriter usb bill of materials (BOM)

38 components, 21 distinct parts.

QtyPartRefs
1
ATMEGA32U2
U1
1
DAC101S101
U2
2
LM339A
U3, U4
2
74AHC595
U5, U6
1
16MHz
X1
1
USB-MINI-B
CON1
1
CONN_3X2
P2
1
Chassis GND
P3
1
EDGE_30X2
PDW1
2
10K
RP1, RP2
2
100K
RP3, RP4
2
SW_PUSH
SW1, SW2
2
22pF
C1, C2
1
4.7uF
C3
8
0.1uF
C4, C6, C7, C8, C9, C10, C11, C12
1
1uF
C5
2
22
R1, R2
2
20K
R3, R6
2
4.7K
R4, R7
2
10K
R5, R9
Show 1 more
QtyPartRefs
1
1K
R8

Displaywriter usb design files

The KiCad project lives in the BASLQC/xwhatits-capsense-controller repository on GitHub; these links point at the commit this page was built from.

Displaywriter usb: common questions

What microcontroller does the Displaywriter usb use?

The Displaywriter usb is built around the ATMEGA32U2, from the AVR/Arduino family.

How big is the Displaywriter usb PCB?

The Displaywriter usb measures 119.8 × 32.5 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Displaywriter usb?

38 components, from 21 distinct parts. The full bill of materials is listed on this page.

Where can I download the Displaywriter usb design files?

From the BASLQC/xwhatits-capsense-controller repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Displaywriter usb design in my own project?

Yes, under the terms of its GPL-3.0 license, which BASLQC chose for the repository.

Can I test firmware for the Displaywriter usb without the hardware?

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

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