HardLabs

Controller

listofoptions·ind-sense·cad/kicad/controller/controller.kicad_pcb

Controller PCB layout, top view — open source AVR/Arduino board by listofoptions

About the Controller PCB

Controller is an open source AVR/Arduino PCB design by listofoptions, published on GitHub under the GPL-2.0 license. It is a 2-layer board measuring 198.2 × 38.1 mm, with 45 components from 17 distinct parts.

Its main chip is the ATmega32U2-AU, from the AVR/Arduino family. Other key parts include the LM393, 74HC595 and USB6B1. By type, the board carries 15 resistors, 12 capacitors, 8 ICs, 6 transformers, 3 connectors and 1 crystal.

It belongs with the keyboards designs in this gallery.

From the project

a prototype mechanical keyboard design based on inductive and capacitive sensing

project folder layout: cad - contains the kicad and autocad files for pcb and switch design datasheets - information about the mechanical and electrical components used jupyter - ipython notebook for the theory of operation layout - proposed eventual keyboard layouts scripts - help scripts for use with design spice - ltspice simulation source

the main driving idea behind this keyboard switch design is to to build an even more reliable beam spring like keyboard, that is a non conductivly sensed switch with a high lifetime. the main mechanism of failure of most capacitive switches is dirt and…

Main components on the Controller

LM39374HC595ATmega32U2-AUUSB6B1

Controller bill of materials (BOM)

45 components, 17 distinct parts.

QtyPartRefs
3
LM393
U1, U4, U7
3
74HC595
U2, U3, U5
1
ATmega32U2-AU
U6
1
USB6B1
U8
1
16M
Y1
1
COLUMNS
J2
1
ROW
J3
1
USB_C_Plug_USB2.0
P1
6
Transformer_1P_1S
T1, T2, T3, T4, T5, T6
9
0U1
C1, C2, C3, C6, C7, C8, C11, C12 +1
2
22P
C4, C5
1
1U
C9
7
10K
R4, R5, R6, R7, R12, R13, R18
2
5K1
R8, R9
2
22
R10, R11
2
R_Pack05
RN1, RN3
2
R_Pack04
RN2, RN4

Controller design files

The KiCad project lives in the listofoptions/ind-sense repository on GitHub; these links point at the commit this page was built from.

Controller: common questions

What microcontroller does the Controller use?

The Controller is built around the ATmega32U2-AU, from the AVR/Arduino family.

How big is the Controller PCB?

The Controller measures 198.2 × 38.1 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Controller?

45 components, from 17 distinct parts. The full bill of materials is listed on this page.

Where can I download the Controller design files?

From the listofoptions/ind-sense repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the Controller design in my own project?

Yes, under the terms of its GPL-2.0 license, which listofoptions chose for the repository.

Can I test firmware for the Controller 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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