HardLabs

Fusion

crides·fusion

Fusion PCB layout, top view — open source Nordic nRF board by crides
Simulate this board

About the Fusion PCB

Fusion is an open source Nordic nRF PCB design by crides, published on GitHub. It is a 2-layer board measuring 125.8 × 91.8 mm, with 100 components from 64 distinct parts.

Its main chip is the HOLYIOT-18010-NO-UNDERSIDE, from the Nordic nRF family. Other key parts include the MT25QL128ABA1ESE, BQ24075, XC6206B331MR, LN4913 and MCP23S08. By type, the board carries 36 relays, 23 resistors, 8 ICs, 8 capacitors, 7 test points and 4 jumpers.

It belongs with the keyboards and power & battery designs in this gallery.

From the project

A folded minimally spaced choc mini (PG1232) keyboard for traveling

My travel board. Uses minimum spacing with choc mini (PG1232) and Cirque touchpad. It's meant to be folded for easy packing for traveling/going to classes. It's called fusion because the halves are now "fused" together (all my previous boards have been split).

The following picture shows how it's originally assembled:

You can find the caps here. They are printed with the MJF Nylon process at JLCPCB.

Fusion, from the project README
From the project README

Main components on the Fusion

HOLYIOT-18010-NO-UNDERSIDEMT25QL128ABA1ESEBQ24075XC6206B331MRLN4913MCP23S08SRV05-4

Fusion bill of materials (BOM)

100 components, 64 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
HOLYIOT-18010-NO-UNDERSIDE
ms88sf3-nrf52840
U1
1
MT25QL128ABA1ESE
XC6220B331MR
U2
1
BQ24075
TLV70237_SOT23-5
U3
1
XC6206B331MR
LN4913
U4
1
LN4913
SRV05-4
U5
1
~
U6
1
MCP23S08
U7
1
SRV05-4
MT25QL128ABA1ESE
U8
1
AO3401A
Q1
1
AO3400A
Q2
1
USB_C_RECEPTACLE_USB2.0
USB_C_Receptacle_USB2.0
J2
1
Conn_01x03_Female
J5
1
~
JP1
1
SolderJumper_2_Open
JP2
1
SolderJumper_3_Open
JP3
1
All or none
JP5
12
C64898
diode-choc
K1, K5, K6, K10, K11, K15, K19, K23 +4
6
C64898
diode-choc
K2, K7, K12, K22, K27, K32
12
C64898
diode-choc
K3, K8, K13, K16, K17, K18, K21, K26 +4
6
C64898
diode-choc
K4, K9, K14, K20, K25, K30
Show 44 more
QtyPartRefs
1
adafruit-sharp-memory-display-no-useless
LCD1
1
Solar_Cell
SC1
1
SW_SPDT
SW1
1
C431541
SW_Push
SW2
1
SW_Push
SW3
1
3V3
TP1
1
GND
TP2
1
MOSI
TP3
1
DR
TP4
1
CS
TP5
1
MISO
TP6
1
SCLK
TP7
1
D
D1
1
C375569
D_Small
D2
1
LED
D4
1
22uH
L1
1
10uH
L2
1
10NF
0.1uF
C1
1
4.7UF
Li Cap
C2
1
4.7UF
4.7uF
C3
1
4.7UF
10nF
C4
1
0.1UF
10nF
C5
1
0.1uF
C6
1
47uF
C7
1
4.7uF
C8
1
10K
4.12M
R1
1
10K
10M
R2
1
100K
22
R3
1
5.9M
R4
1
5.1M
22
R5
4
5.1M
R6, R11, R15, R16
1
5.1K
5.1k
R7
1
5.1M
5.1k
R8
1
5.1K
1M
R9
1
100K
100k
R10
1
1.2K
5.1M
R12
1
1.5K
5.1M
R13
2
1k
R14, R22
1
1M
R17
1
4.12M
R18
1
4.87M
R19
1
1.2k
R20
1
1.5k
R21
1
10M
R23

Fusion design files

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

Fusion: common questions

What microcontroller does the Fusion use?

The Fusion is built around the HOLYIOT-18010-NO-UNDERSIDE, from the Nordic nRF family.

How big is the Fusion PCB?

The Fusion measures 125.8 × 91.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Fusion?

100 components, from 64 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 Fusion design files?

From the crides/fusion 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 Fusion design in my own project?

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

Can I test firmware for the Fusion without the hardware?

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

Similar boards