HardLabs

NHW68

dingyifei·NHW68·hardware/PCB/PCB.kicad_pcb

NHW68 PCB layout, top view — open source STM32 board by dingyifei
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About the NHW68 PCB

NHW68 is an open source STM32 PCB design by dingyifei, published on GitHub under the MIT license. It is a 2-layer board measuring 282.7 × 117.3 mm, with 256 components from 23 distinct parts.

Its main chip is the STM32F303CCT6, from the STM32 family. Other key parts include the IS31FL3733-QFLS4-TR and AZ1117CH-3.3TRG1. By type, the board carries 136 diodes, 28 capacitors, 12 resistors, 4 ICs, 2 connectors and 2 switches.

It belongs with the keyboards designs in this gallery.

From the project

A keyboard with easy to source parts and open source PCB design

This project (not include ./hardware/KiCad/, ./code, or files with licenses inside them) is using MIT license.

If not specified, the files in ./code are GPL V2

Code should be functional, haven't push it to QMK or tested on the keyboard yet, compile passed.

I'm attempting to draw the PCB and its my first time drawing a PCB so 0 confidence it will work. I did my research and if you want to use it plz do your own research make sure it works.

NHW68, from the project README
From the project README

Main components on the NHW68

IS31FL3733-QFLS4-TRSTM32F303CCT6AZ1117CH-3.3TRG1

NHW68 bill of materials (BOM)

256 components, 23 distinct parts.

QtyPartRefs
2
IS31FL3733-QFLS4-TR
U1, U2
1
STM32F303CCT6
U3
1
AZ1117CH-3.3TRG1
U4
1
8Mhz 20pf
Y1
1
47346-0001
J1
1
1.27mm STDC14
J2
3
tooling
H7, H8, H9
68
Switch
Key1, Key2, Key3, Key4, Key5, Key6, Key7, Key8 +60
2
K2-1187SQ-A4SW-06
SW1, SW2
68
1N4148WS
D1, D2, D3, D4, D5, D6, D7, D8 +60
68
RABG
D69, D70, D71, D72, D73, D74, D75, D76 +60
8
470nF
C1, C2, C3, C4, C5, C6, C15, C16
3
22uf/10v
C7, C8, C19
11
100nF
C9, C10, C11, C12, C13, C14, C17, C22 +3
1
10uf
C18
2
10pF
C20, C21
1
4.7uf
C26
1
10nF
C27
1
1uf
C28
4
100k
R1, R2, R5, R9
Show 3 more
QtyPartRefs
2
22k
R3, R4
4
1.5K
R6, R7, R8, R12
2
22
R10, R11

NHW68 design files

The KiCad project lives in the dingyifei/NHW68 repository on GitHub; these links point at the commit this page was built from.

NHW68: common questions

What microcontroller does the NHW68 use?

The NHW68 is built around the STM32F303CCT6, from the STM32 family.

How big is the NHW68 PCB?

The NHW68 measures 282.7 × 117.3 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the NHW68?

256 components, from 23 distinct parts. The full bill of materials is listed on this page.

Where can I download the NHW68 design files?

From the dingyifei/NHW68 repository on GitHub, which has the KiCad layout; the links under Design files point to each one.

Can I use the NHW68 design in my own project?

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

Can I test firmware for the NHW68 without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.

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