HardLabs

Mdbt micro

siderakb·mdbt-micro·MDBTMicro_50Q/MDBTMicro_50Q.kicad_pcb

Mdbt micro PCB layout, top view — open source Nordic nRF board by siderakb

About the Mdbt micro PCB

Mdbt micro is an open source Nordic nRF PCB design by siderakb, published on GitHub under the MIT license. It is a 2-layer board measuring 33 × 17.8 mm, with 29 components from 22 distinct parts.

Its main chip is the MDBT50Q-x1MV2, from the Nordic nRF family. Other key parts include the XC6220B331MR-G and TP4057. By type, the board carries 10 resistors, 4 connectors, 4 capacitors, 3 ICs, 3 LEDs and 2 transistors.

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

From the project

A nRFMicro/Pro Micro compatible Bluetooth LE board, uses MDBT50Q nRF52840/nRF52833 module

MDBTMicro-50Q is an alternative board to nRFMicro/Pro Micro.

It has USB Type-C and LiPo charger, uses Raytac MDBT50Q-x1MV2 nRF52840 module (or MDBT50Q-x512K nRF52833 module) instead of E73-2G4M08S1.

Go to Releases for schematic and Gerber files.

- Please note that the footprint of R5 and LD3 is 0402. - R2, R3, U3 and LD1 are not necessary if LiPo charger is not required. - R6 and R7 are not necessary if LiPo battery monitor is not required. - Adjust the LiPo charging current with the value of R3. - 20 kΩ: 50 mA - 10 kΩ: 100 mA - 5 kΩ: 200 mA - 4 kΩ: 250 mA - 3 kΩ: 300 mA - 2 kΩ: 400 mA -…

Mdbt micro, from the project README
From the project README

Main components on the Mdbt micro

XC6220B331MR-GMDBT50Q-x1MV2TP4057

Mdbt micro bill of materials (BOM)

29 components, 22 distinct parts.

QtyPartRefs
1
XC6220B331MR-G
U1
1
MDBT50Q-x1MV2
U2
1
TP4057
U3
2
AO3407
Q1, Q2
1
32.768kHz
X1
2
Conn_01x13
J1, J4
1
USB_C_Receptacle_USB2.0
J2
1
Conn_01x02
J3
1
SolderJumper_2_Open
JP1
1
Red
LD1
1
Blue
LD2
1
Green
LD3
1
1N5819
D1
2
1uF
C1, C2
2
12pF
C3, C4
1
100k
R1
2
1k
R2, R4
1
Rprog
R3
1
1k
R5
1
820k
R6
Show 2 more
QtyPartRefs
2
2M
R7, R8
2
5.1k
R9, R10

Mdbt micro design files

The KiCad project lives in the siderakb/mdbt-micro repository on GitHub; these links point at the commit this page was built from.

Mdbt micro: common questions

What microcontroller does the Mdbt micro use?

The Mdbt micro is built around the MDBT50Q-x1MV2, from the Nordic nRF family.

How big is the Mdbt micro PCB?

The Mdbt micro measures 33 × 17.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Mdbt micro?

29 components, from 22 distinct parts. The full bill of materials is listed on this page.

Where can I download the Mdbt micro design files?

From the siderakb/mdbt-micro repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Mdbt micro design in my own project?

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

Can I test firmware for the Mdbt micro 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.

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