HardLabs

Naja duo

bitaxeorg·naja-duo

Naja duo PCB layout, top view — open source ESP32 board by bitaxeorg

About the Naja duo PCB

Naja duo is an open source ESP32 PCB design by bitaxeorg, published on GitHub under the CERN-OHL-S-2.0 license. It is a 6-layer board measuring 147 × 90 mm, with 198 components from 47 distinct parts.

Its main chip is the ESP32-S3-WROOM-1-N16R8, from the ESP32 family. Other key parts include the SN74AXC4T774, TPS546D24S, TPS62933DRLR, 25MHz and TLV77308PDBVR. By type, the board carries 115 capacitors, 52 resistors, 15 ICs, 6 connectors, 6 inductors and 2 modules.

From the project

Dual BM1373 open-source Bitcoin miner

BitaxeNajaDuo is a dual BM1373 Open Source Bitcoin miner using esp-miner

The BM1373 used in this design is suspected to be the ASIC used in the Antminer S23 series miners.

It is still an untested prototype! Don't build this expecting it to work at all.

Bitaxe is an open source project released under the CERN Open Hardware Licence Version 2 - Strongly Reciprocal

Naja duo, from the project README
From the project README

Main components on the Naja duo

SN74AXC4T774TPS546D24STPS62933DRLRESP32-S3-WROOM-1-N16R825MHzTLV77308PDBVRTLV77312PDBVREMC2103-2-AP-TRAP2502KTR-G1TLV3544BM1340_mode1

Naja duo bill of materials (BOM)

198 components, 47 distinct parts.

QtyPartRefs
1
SN74AXC4T774
U2
2
TPS546D24S
U3, U7
2
TPS62933DRLR
U4, U5
1
ESP32-S3-WROOM-1-N16R8
U6
2
25MHz
U8, U15
2
TLV77308PDBVR
U10, U12
2
TLV77312PDBVR
U11, U14
1
EMC2103-2-AP-TR
U13
1
AP2502KTR-G1
U16
1
TLV3544
U17
2
BM1340_mode1
A1, A2
1
XT30
J1
1
FPC-05F-30PH20
J2
1
USB_C_Receptacle_USB2.0
J4
3
Conn_01x04
J7, J8, J9
2
SWITCH-SPST
SW1, SW2
2
FerriteBead
FB1, FB2
2
300nH
L1, L4
2
1.5uH
L2, L3
24
10uF
C2, C3, C8, C12, C24, C26, C38, C41 +16
Show 27 more
QtyPartRefs
42
1uF
C4, C16, C21, C27, C44, C45, C48, C63 +34
2
4.7nF
C5, C31
2
2.2nF
C6, C32
16
0.1uF
C7, C18, C22, C23, C33, C37, C39, C42 +8
2
1000pF
C9, C46
12
100uF
C10, C11, C13, C14, C15, C102, C105, C107 +4
2
4.7uF
C19, C40
2
33nF
C29, C30
2
22uF
C35, C36
4
33pF
C47, C50, C100, C103
2
470pF
C93, C95
1
100pF
C101
2
120uF
C104, C106
2
49.9
R1, R10
2
1
R2, R21
2
10
R3, R19
19
10k
R5, R6, R13, R16, R20, R24, R30, R37 +11
1
30.9k
R12
2
5.1k
R14, R25
1
13.7k
R15
1
52.3k
R17
1
20k
R23
12
1k
R26, R28, R38, R55, R58, R61, R64, R68 +4
1
2k
R27
6
0
R29, R32, R34, R36, R67, R73
1
5.6k
R31
1
4.7k
R39

Naja duo design files

The KiCad project lives in the bitaxeorg/naja-duo repository on GitHub; these links point at the commit this page was built from.

Naja duo: common questions

What microcontroller does the Naja duo use?

The Naja duo is built around the ESP32-S3-WROOM-1-N16R8, from the ESP32 family.

How big is the Naja duo PCB?

The Naja duo measures 147 × 90 mm, has 6 copper layers and is 1.6 mm thick.

How many components are on the Naja duo?

198 components, from 47 distinct parts. The full bill of materials is listed on this page.

Where can I download the Naja duo design files?

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

Can I use the Naja duo design in my own project?

Yes, under the terms of its CERN-OHL-S-2.0 license, which bitaxeorg chose for the repository.

Can I test firmware for the Naja duo without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug ESP32 firmware against it before you order a PCB.

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