2 layers180 × 120 mm
2 layers55 × 55.3 mm
Aetzbox CPU
mirdej/etchingbox7portable pcb etching in a box
- Size
- 55 × 55.3 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 47
- Nets
- 48
- Pads
- 169
- Tracks, vias
- 322, 23
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 13 May 2014
- Updated
- 5 Aug 2025
Overview
Aetzbox CPU is an open-source printed circuit board by mirdej, from the mirdej/etchingbox repository on GitHub, published under the GPL-2.0 licence. It is a 2-layer board of 55 × 55.3 mm with 47 parts on 48 nets, routed with 322 tracks and 23 vias.
It is built around the ESP32-S3-WROOM-1-N8, TSR 1-2433E and B160-13-F(MS), with the MCU75N06YHE3-TP and IRLML0030TRPBF among its other parts. Its parts include 15 resistors, 6 capacitors, 6 ICs, 5 connectors and 5 switches. It belongs with the ESP32 boards of this library.
Main components
5
ESP32-S3-WROOM-1-N8
SMD,25.5x18mm-40℃~+85℃ -98.2dBm 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA Bluetooth5.0 ESP32-S3 Chip On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi ModulesTSR 1-2433E
SIP,11.6x7.5mm-40℃~+85℃ 1 1000uF 1A 3.3V 520kHz 6V~36V 80mVp-p 88% Plastic encapsulated type Short Circuit Protection、Over-temperature protection、Over Current Protection、Automatic fault recovery Step-down type ±4% SIP,11.6x7.5mm DC-DC Power Modules ROHSTRACO POWERDC-DC Power Modules
B160-13-F(MS)
SMASchottky DiodesMSKSEMIMCU75N06YHE3-TP
-- Lack of specifications ROHSMicro Commercial ComponentsUncategorised
IRLML0030TRPBF
SOT-23-55℃~+150℃ 1 N-channel 1.3V 1.3W 2.6nC@10V 27mΩ 30V 382pF 39pF 5.3A SOT-23 MOSFETs ROHSInfineon TechnologiesMOSFETs
README
README.md
AETZBOX
DIY Mobile PCB Etching KIT
The Idea
Build a portable / mobile PCB etching workstation that fulfills these criteria
- waterproof
- able to etch 100x160mm double sided boards with 8mil precision
- low cost. total bill of materials should not exceed 150 CHF
- diy approach, mostly laser cut plexi and easily sourceable materials
- fits in a RAKO Box
Some guiding ideas
- use very little but always fresh chemicals
- good heat management: etching has to be done at 45-50 degrees celsius, developer has to be kept at >20 degrees as well (in my workshop, temperatures can easily drop below 16 degrees and developing is a pain).
- all material and chemicals travel in the box. liquid waste can travel in the box as well until it can properly disposed of.
- should be easy to clean. no electronics exposed to moisture.
- as few as possible switches and electrical contacts exposed to the harsh etching environment
- self illuminating
More Info
Parts
47| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 5k1 | Resistor_SMD:R_0805_2012Metric | R1, R3, R5, R6, R7, R11, R12, R14 |
| 4 | SW_Push | synkie_footprints:Alps_Tactile_Switch | SW1, SW2, SW3, SW4 |
| 2 | 100 | Resistor_SMD:R_0805_2012Metric | R2, R4 |
| 2 | 100n | synkie_footprints:C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C1, C4 |
| 2 | 10u | synkie_footprints:C_1206_3216Metric_Pad1.42x1.75mm_HandSolder | C2, C5 |
| 2 | B160-13-F | Diode_SMD:D_SMA-SMB_Universal_Handsoldering | D1, D2 |
| 2 | MCU75N06YHE3 | Package_TO_SOT_SMD:TO-252-2 | Q2, Q5 |
| 2 | MountingHole_Pad | MountingHole:MountingHole_2.5mm_Pad | H1, H2 |
| 1 | 100u | Capacitor_Tantalum_SMD:CP_EIA-6032-20_AVX-F | C3 |
| 1 | 1u | synkie_footprints:C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C6 |
| 1 | 2k | Resistor_SMD:R_0805_2012Metric | R10 |
| 1 | 6k8 | Resistor_SMD:R_0805_2012Metric | R13 |
| 1 | Bain Marie (100) | Resistor_SMD:R_0805_2012Metric | R16 |
| 1 | CONN | Anyma06:Molex_Mini-Fit_Jr_5569-04A2_2x02_P4.20mm_H+V | J1 |
| 1 | Conn_01x03_Male | synkie_footprints:Molex_KK-254_AE-6410-03A_1x03_P2.54mm_Vertical | Temperature1 |
| 1 | Conn_01x11 | Connector_FFC-FPC:Molex_200528-0100_1x10-1MP_P1.00mm_Horizontal | J4 |
| 1 | Cuvette (100) | Resistor_SMD:R_0805_2012Metric | R8 |
| 1 | ESP32-S3-WROOM | 2022_midi_controller:ESP32-S3-WROOM | U2 |
| 1 | IRLML0030TRPBF | Package_TO_SOT_SMD:SOT-23 | Q7 |
| 1 | Insoleuse (100) | Resistor_SMD:R_0805_2012Metric | R15 |
| 1 | LOGO | Symbol:OSHW-Logo2_7.3x6mm_SilkScreen | U7 |
| 1 | LOGO | anyma_footprints:logo_sgmk | U6 |
| 1 | LOGO | anyma_footprints:logo_anyma_tiny | U5 |
| 1 | MountingHole | MountingHole:MountingHole_2.5mm | H4 |
| 1 | SW_Push | Anyma06:MiniButtonPLCC4 | SW5 |
| 1 | TSR1-2433E | Converter_DCDC:Converter_DCDC_TRACO_TSR1-xxxxE_THT | U1 |
| 1 | ad2 | synkie_footprints:Solderpad_1mm | J2 |
| 1 | heat | Connector_Molex:Molex_Mini-Fit_Jr_5566-02A_2x01_P4.20mm_Vertical | Heat1 |
| 1 | i2c-display128x32 | synkie_footprints:Bangood_I2C_Display | U3 |
| 1 | levelsensor | Connector_PinSocket_1.27mm:PinSocket_1x06_P1.27mm_Vertical | J3 |
| 1 | prog | Anyma06:ESP-POGO-PROG-THT | J5 |
Questions
How big is the Aetzbox CPU PCB?
It measures 55 × 55.3 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Aetzbox CPU use?
47 parts, built around the ESP32-S3-WROOM-1-N8, TSR 1-2433E, B160-13-F(MS) and MCU75N06YHE3-TP. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Aetzbox CPU KiCad files?
From the mirdej/etchingbox repository on GitHub, at the commit this page was made from: the board is Electronics/Aetzbox-CPU/Aetzbox-CPU.kicad_pcb and its schematic Electronics/Aetzbox-CPU/Aetzbox-CPU.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Aetzbox CPU design in my own project?
Its repository publishes it under the GPL-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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