HardLabs

Kbox hardware

sarfata·kbox-hardware

Kbox hardware PCB layout, top view — open source NXP board by sarfata
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About the Kbox hardware PCB

Kbox hardware is an open source NXP PCB design by sarfata, published on GitHub. It is a 2-layer board measuring 100 × 54 mm, with 102 components from 54 distinct parts.

Its main chip is the MK20DX256VLH7, from the NXP family. Other key parts include the TL2575, ESP-13-WROOM-02, ILI9341_LCD_Breakout, LP38691 and MKL02Z32VFG4. By type, the board carries 31 capacitors, 26 resistors, 15 ICs, 10 connectors, 10 diodes and 4 inductors.

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

From the project

Open-source electronics for your boat

Thanks for your interest in KBox! As of May 2020, I am not manufacturing or selling KBox anymore. All the source code and design files remain available for your inspiration and if you have any question, feel free to reach out by twitter message, email or via a github issue.

You might also be interested in my new project, inspired by KBox: a better sailing analytics platform. So if you are looking for a way to improve your tacks, perfect your downind sailing or just measure sailing angles and speeds, head over to ChartedSails.com.

Kbox hardware, from the project README
From the project README

Main components on the Kbox hardware

TL2575ESP-13-WROOM-02ILI9341_LCD_BreakoutLP38691MK20DX256VLH7MKL02Z32VFG4MCP2562SN65C1168EINA219BMP280BNO055SN74HCT245N2K_RGBWIFI_RGBNMEA_RGB

Kbox hardware bill of materials (BOM)

102 components, 54 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TL2575
U1
1
ESP-13-WROOM-02
U2
1
ILI9341_LCD_Breakout
U3
1
LP38691
U4
1
MK20DX256VLH7
U5
1
MKL02Z32VFG4
U6
1
MCP2562
U7
1
SN65C1168E
U8
1
INA219
U9
1
BMP280
U10
1
BNO055
U11
1
SN74HCT245
U12
1
N2K_RGB
U13
1
WIFI_RGB
U14
1
NMEA_RGB
U15
1
FDC654P
Q1
1
MMBT3904
Q2
1
CRYSTAL_SMD
X1
1
ABS07-32.768KHZ-T
Y1
1
MICROSD
CON1
Show 34 more
QtyPartRefs
1
USB-MICRO-B-SHIELDED
J1
2
CONN_01X10
J2, J3
1
WIFI_DBG
P1
1
SPI_DBG
P2
1
NMEA_DBG
P3
1
CONN_01X10
P4
1
CONN_01X03
P5
1
CORTEX_DEBUG
P6
1
Encoder_switch
E1
1
PROGRAM
SW2
3
1N5819
D1, D2, D4
4
5.1V
D3, D7, D8, D9
1
LED
D5
1
LM4040QCEM3-3.0/NOPB
D6
1
5.1V
D10
1
330uH
L1
3
600 Ohm / 100 Mhz
L2, L3, L4
1
100uF
C1
1
330uF
C2
23
.1uF
C3, C6, C7, C8, C10, C11, C12, C13 +15
3
2.2uF
C4, C5, C9
1
6.8nF
C21
1
120nF
C22
1
0.01uF
C31
7
10k
R1, R2, R5, R14, R15, R24, R25
1
100
R3
2
1k
R4, R12
4
56k .1%
R6, R18, R20, R22
4
10k .1%
R7, R19, R21, R23
2
33
R8, R9
1
2.4k
R10
1
470
R11
2
10
R16, R17
2
4.7k
R26, R27

Kbox hardware design files

The KiCad project lives in the sarfata/kbox-hardware repository on GitHub; these links point at the commit this page was built from.

Kbox hardware: common questions

What microcontroller does the Kbox hardware use?

The Kbox hardware is built around the MK20DX256VLH7, from the NXP family.

How big is the Kbox hardware PCB?

The Kbox hardware measures 100 × 54 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Kbox hardware?

102 components, from 54 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 Kbox hardware design files?

From the sarfata/kbox-hardware repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Kbox hardware design in my own project?

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

Can I test firmware for the Kbox hardware without the hardware?

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

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