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Bittyaxe

BeeEvolved·Bittyaxe·Kicad/bittyaxe.kicad_pcb

Bittyaxe PCB layout, top view — open source ESP32 board by BeeEvolved
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About the Bittyaxe PCB

Bittyaxe is an open source ESP32 PCB design by BeeEvolved, published on GitHub under the CERN-OHL-S-2.0 license. It is a 4-layer board measuring 55.5 × 66.9 mm, with 85 components from 39 distinct parts.

Its main chip is the ESP32-S3-WROOM-1, from the ESP32 family. Other key parts include the TPS546D24ARVFR, RT9080-33GJ5, MCP1824T-1202E/OT, MCP1824T-0802E and 25MHZ. By type, the board carries 52 capacitors, 18 resistors, 9 ICs, 3 connectors, 2 switches and 1 inductor.

From the project

itty-bitty open-source Bitcoin miner based on the original Bitaxe, reconfigured and branching off on its own unique development pathway, focusing on a small form factor and minimal footprint.

The BittyAxe is a compact ASIC miner inspired by the BitAxe Gamma design. It harnesses the power of the BM1370 ASIC chip to achieve hash rates of approximately 1.2 TH/s with an energy efficiency of 15 J/TH.

Bittyaxe, from the project README
From the project README

Main components on the Bittyaxe

TPS546D24ARVFRRT9080-33GJ5ESP32-S3-WROOM-1MCP1824T-1202E/OTMCP1824T-0802E25MHZBM1370_MODE1SN74AVC4T774EMC2101

Bittyaxe bill of materials (BOM)

85 components, 39 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TPS546D24ARVFR
U2
1
RT9080-33GJ5
U3
1
ESP32-S3-WROOM-1
U4
1
MCP1824T-1202E/OT
U5
1
MCP1824T-0802E
U6
1
25MHZ
25MHz
U7
1
BM1370_MODE1
BM1370_mode1
U8
1
SN74AVC4T774
U9
1
EMC2101
U10
1
54-00164
J1
1
USB_C_RECEPTACLE_USB2.0
USB_C_Receptacle_USB2.0
J5
1
CONN_01X04
Conn_01x04
J6
2
GT-TC029B-H025-L1N
SW1, SW2
1
300NH
300nH
L1
24
1UF
1uF
C1, C5, C7, C21, C22, C23, C26, C27 +16
2
10UF
10uF
C2, C24
2
47UF
47uF
C3, C4
1
4700PF
4700pF
C6
10
0.1UF
0.1uF
C8, C12, C25, C29, C37, C38, C47, C49 +2
1
2200PF
2200pF
C9
Show 19 more
QtyPartRefs
1
4.7UF
4.7uF
C10
1
1000PF
1000pF
C11
1
100PF
100pF
C13
3
22UF
22uF
C14, C15, C16
5
100UF
100uF
C17, C18, C19, C20, C43
1
470PF
470pF
C50
1
8.25K
8.25k
R1
1
14.7K
14.7k
R5
1
RES 0 OHM JUMPER 1/16W
R6
1
3.74K
3.74k
R8
1
11.8K
11.8k
R9
1
68.1K
68.1k
R10
1
10
R11
1
1
R12
2
49.9
R13, R14
4
10K
10k
R15, R16, R17, R25
1
1k
R19
2
100
R22, R23
1
5.6K
5.6k
R24

Bittyaxe design files

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

Bittyaxe: common questions

What microcontroller does the Bittyaxe use?

The Bittyaxe is built around the ESP32-S3-WROOM-1, from the ESP32 family.

How big is the Bittyaxe PCB?

The Bittyaxe measures 55.5 × 66.9 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the Bittyaxe?

85 components, from 39 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 Bittyaxe design files?

From the BeeEvolved/Bittyaxe 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 Bittyaxe design in my own project?

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

Can I test firmware for the Bittyaxe 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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