HardLabs

BLEhound

huang5780bak·BLEhound·hardware/v2-wip/kicad/blehound.kicad_pcb

BLEhound PCB layout, top view — open source Nordic nRF board by huang5780bak

About the BLEhound PCB

BLEhound is an open source Nordic nRF PCB design by huang5780bak, published on GitHub under the Apache-2.0 license. It is a 6-layer board measuring 70 × 60 mm, with 157 components from 50 distinct parts.

Its main chip is the nRF54LM20A ch37, from the Nordic nRF family. Other key parts include the nRF54LM20A ch38, nRF54LM20A ch39, NRF21540-QDAA, CH334F and AP2112K-3.3. By type, the board carries 65 capacitors, 35 inductors, 22 resistors, 10 connectors, 8 ICs and 8 diodes.

From the project

⚠️ This is an unfinished revision — routing is incomplete. Do not fabricate it. V2 is the fix for V1's pin-level defects; until it is finished, working three-board hardware means a reworked V1 (flying-wire fixes applied) — see ../v1/README.md. A plain V1 works for single-board sn

⚠️ This is an unfinished revision — routing is incomplete. Do not fabricate it. V2 is the fix for V1's pin-level defects; until it is finished, working three-board hardware means a reworked V1 (flying-wire fixes applied) — see ../v1/README.md. A plain V1 works for single-board sniffing only.

V2 folds V1's fixes directly onto the PCB, so no flying wires are needed. For SYNC and the straps the firmware pin targets are unchanged — V1 reaches them by flying wire, V2 by native routing. Concretely:

Main components on the BLEhound

nRF54LM20A ch37nRF54LM20A ch38nRF54LM20A ch39NRF21540-QDAACH334FAP2112K-3.3

BLEhound bill of materials (BOM)

157 components, 50 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
nRF54LM20A ch37
U1
1
nRF54LM20A ch38
U2
1
nRF54LM20A ch39
U3
3
NRF21540-QDAA
U4, U5, U6
1
CH334F
U7
1
AP2112K-3.3
U8
3
32MHZ
Y1, Y2, Y3
6
SMA_2081005-1
J1, J2, J4, J5, J7, J8
1
SWD+ETM ch37
J3
1
SWD+ETM ch38
J6
1
SWD+ETM ch39
J9
1
USB-C
J10
3
BOOT
SW1, SW3, SW5
3
RESET
SW2, SW4, SW6
3
GREEN
D1, D2, D3
1
PWR
D4
1
PRTR5V0U2F
D5
1
SMAJ5.0A
D6
2
PESD5V0S1BA
D7, D8
3
120R
FB1, FB3, FB5
Show 30 more
QtyPartRefs
3
15NH
15nH
FB2, FB4, FB6
1
120R/3A
FB7
3
3.6NH
3.6nH
L1, L10, L19
3
4.7NH
4.7nH
L2, L11, L20
3
3.3NH
3.3nH
L3, L12, L21
6
1.9NH
1.9nH
L4, L6, L13, L15, L22, L24
6
3.0NH
3.0nH
L5, L7, L14, L16, L23, L25
3
4.7UH
4.7uH
L8, L17, L26
3
1.0NH
1.0nH
L9, L18, L27
1
DLM0NSM900HY2D
L28
3
1.2PF
1.2pF
C1, C21, C41
3
1.5PF
1.5pF
C2, C22, C42
3
0.3PF
0.3pF
C3, C23, C43
12
1.0PF
1.0pF
C4, C8, C10, C13, C24, C28, C30, C33 +4
3
100NF
100nF
C5, C25, C45
3
10UF
10uF
C6, C26, C46
6
2.0PF
2.0pF
C7, C9, C27, C29, C47, C49
3
4.7UF
4.7uF
C11, C31, C51
9
2.2UF
2.2uF
C12, C14, C15, C32, C34, C35, C52, C54 +1
10
100NF
100nF
C16, C17, C18, C36, C37, C38, C56, C57 +2
4
10UF
10uF
C19, C39, C59, C63
3
4.7UF
4.7uF
C20, C40, C60
1
1UF
1uF
C61
2
1UF
1uF
C62, C64
3
33K
33k
R1, R6, R11
4
1k
R2, R7, R12, R18
9
10K
10k
R3, R4, R5, R8, R9, R10, R13, R14 +1
2
5.1K
5.1k
R16, R17
1
4.7K
4.7k
R19
3
—
R20, R21, R22

BLEhound design files

The KiCad project lives in the huang5780bak/BLEhound repository on GitHub; these links point at the commit this page was built from.

BLEhound: common questions

What microcontroller does the BLEhound use?

The BLEhound is built around the nRF54LM20A ch37, from the Nordic nRF family.

How big is the BLEhound PCB?

The BLEhound measures 70 × 60 mm, has 6 copper layers and is 1.6 mm thick.

How many components are on the BLEhound?

157 components, from 50 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 BLEhound design files?

From the huang5780bak/BLEhound 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 BLEhound design in my own project?

Yes, under the terms of its Apache-2.0 license, which huang5780bak chose for the repository.

Can I test firmware for the BLEhound 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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