Canary
About the Canary PCB
Canary is an open source ESP32 PCB design by stoatworks-labs, published on GitHub under the CERN-OHL-S-2.0 license. It is a 4-layer board measuring 100 × 81 mm, with 76 components from 50 distinct parts.
Its main chip is the ESP32-S3-WROOM-1-N8, from the ESP32 family. Other key parts include the AP63200WU-7, CH224K, ADM3053BRWZ-REEL7 and W5500. By type, the board carries 29 capacitors, 24 resistors, 5 ICs, 5 connectors, 5 diodes and 3 switches.
It belongs with the audio designs in this gallery.
From the project
Open-hardware IP-to-CAN converter compatible with the d&b R70 Ethernet-to-CAN protocol. ESP32-S3, W5500, isolated CAN, 3D-printed case. Not affiliated with d&b audiotechnik.
KiCad 10 project for the R70-compatible IP-to-CAN bridge. Architecture and the reasoning behind every part choice: ../docs/DECISIONS.md (H1–H13).
All four sheets are drawn — 68 symbols, 0 unconnected pins on every sheet, and the exported netlist confirms every cross-sheet bus connects. One part is still missing (U101, see below).
All 68 symbols have footprints assigned — except that the three etherCON jacks carry a deliberate placeholder (see below).
Main components on the Canary
Canary bill of materials (BOM)
76 components, 50 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | AP63200WU-7 AP63200WU Diodes Incorporated | TSOT-23-6 | U103 |
| 1 | CH224K WCH(Jiangsu Qin Heng) | SSOP-10-1EP_3.9x4.9mm_P1mm_EP2.1x3.3mm | U104 |
| 1 | ADM3053BRWZ-REEL7 ADM3053BRWZ Analog Devices | SOIC-20W_7.5x12.8mm_P1.27mm | U201 |
| 1 | ESP32-S3-WROOM-1-N8 Espressif Systems | ESP32-S3-WROOM-1 | U301 |
| 1 | W5500 WIZNET | LQFP-48_7x7mm_P0.5mm | U401 |
| 1 | X322525MOB4SI 25MHz 10ppm YXC Crystal Oscillators | Crystal_SMD_3225-4Pin_3.2x2.5mm | Y401 |
| 1 | TYPE-C-31-M-12 USB-C 16P Korean Hroparts Elec | USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J102 |
| 1 | NE8FBH etherCON NE8FBH CAN A Neutrik | Neutrik_etherCON_NE8FBH | J201 |
| 1 | NE8FBH etherCON NE8FBH CAN B Neutrik | Neutrik_etherCON_NE8FBH | J202 |
| 1 | UART/debug 1.27mm DO NOT FIT | PinHeader_1x06_P1.27mm_Vertical | J301 |
| 1 | NE8FBH etherCON NE8FBH LAN Neutrik | Neutrik_etherCON_NE8FBH | J401 |
| 1 | BSMD1206-110-30V PTC 1.1A BHFUSE | Fuse_1206_3216Metric | F101 |
| 1 | 206-2ST TERMINATE 120R CTS Electrocomponents | SW_DIP_SPSTx02_Slide_9.78x7.26mm_W7.62mm_P2.54mm | SW201 |
| 1 | PTS645SK43SMTR92LFS RESET C&K | SW_SPST_PTS645Sx43SMTR92 | SW301 |
| 1 | PTS645SK43SMTR92LFS BOOT C&K | SW_SPST_PTS645Sx43SMTR92 | SW302 |
| 1 | PT61017PEL BOURNS | Transformer_Ethernet_Bourns_PT61017PEL | T401 |
| 1 | NUP2105LT1G NUP2105L TECH PUBLIC | SOT-23 | D201 |
| 1 | KT-0603G LAN (green) Hubei KENTO Elec | LED_0603_1608Metric | D301 |
| 1 | KT-0603R ERR (red) Hubei KENTO Elec | LED_0603_1608Metric | D302 |
| 1 | KT-0603G CAN (green) Hubei KENTO Elec | LED_0603_1608Metric | D303 |
Show 30 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | KT-0603G ON (green) Hubei KENTO Elec | LED_0603_1608Metric | D304 |
| 1 | BLM18AG601SN1D 600R@100MHz Murata Electronics | L_0603_1608Metric | FB201 |
| 1 | SRN4018-2R2M 2.2uH 2A BOURNS | L_Bourns-SRN4018 | L102 |
| 1 | CL05B104KO5NNNC 100nF (BST) Samsung Electro-Mechanics | C_0402_1005Metric | C105 |
| 1 | CL21A226MAQNNNE 22uF 16V Samsung Electro-Mechanics | C_0805_2012Metric | C106 |
| 1 | CL21A106KAYNNNE 10uF 16V Samsung Electro-Mechanics | C_0805_2012Metric | C107 |
| 12 | CL05B104KO5NNNC 100nF Samsung Electro-Mechanics | C_0402_1005Metric | C108, C201, C203, C204, C206, C302, C303, C304 +4 |
| 1 | CL05A105KA5NQNC 1uF Samsung Electro-Mechanics | C_0402_1005Metric | C109 |
| 3 | CL21A106KAYNNNE 10uF Samsung Electro-Mechanics | C_0805_2012Metric | C202, C205, C403 |
| 1 | 0603B472K500NT 4.7nF FH (Guangdong Fenghua Advanced Tech) | C_0603_1608Metric | C207 |
| 1 | CL21A226MAQNNNE 22uF Samsung Electro-Mechanics | C_0805_2012Metric | C301 |
| 2 | 0402CG180J500NT 18pF FH (Guangdong Fenghua Advanced Tech) | C_0402_1005Metric | C401, C402 |
| 1 | CL10A475KO8NNNC 4.7uF (1V2O) Samsung Electro-Mechanics | C_0603_1608Metric | C408 |
| 1 | CL05B104KO5NNNC 100nF (VBG) Samsung Electro-Mechanics | C_0402_1005Metric | C409 |
| 1 | CL10A475KO8NNNC 4.7uF (TOCAP) Samsung Electro-Mechanics | C_0603_1608Metric | C410 |
| 1 | 1206B102K202NT 1nF 2kV FH (Guangdong Fenghua Advanced Tech) | C_1206_3216Metric | C411 |
| 1 | CL05B103KB5NNNC 10nF (TCT) Samsung Electro-Mechanics | C_0402_1005Metric | C412 |
| 1 | CC0402KRX7R9BB682 6.8nF (RCT) YAGEO | C_0402_1005Metric | C413 |
| 1 | 0402WGF3162TCE 31.6k 1% UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R103 |
| 1 | 0402WGF1002TCE 10k 1% UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R104 |
| 5 | 0402WGF1001TCE 1k UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R106, R302, R303, R304, R305 |
| 2 | 0402WGF1002TCE 10k UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R107, R301 |
| 1 | 0402WGF0000TCE 0R UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R201 |
| 2 | 0603WAF620JT5E 62R UNI-ROYAL(Uniroyal Elec) | R_0603_1608Metric | R202, R203 |
| 1 | 0402WGF1242TCE 12.4k 1% UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R401 |
| 4 | 0603WAF750JT5E 75R UNI-ROYAL(Uniroyal Elec) | R_0603_1608Metric | R402, R403, R404, R405 |
| 4 | 0402WGF499JTCE 49.9R 1% UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R406, R407, R408, R409 |
| 1 | 0402WGF100JTCE 10R 1% UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R410 |
| 1 | 0402WGF1004TCE 1M UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R411 |
| 1 | 0402WGF0000TCE 0R (XO series) UNI-ROYAL(Uniroyal Elec) | R_0402_1005Metric | R412 |
Canary design files
The KiCad project lives in the stoatworks-labs/canary repository on GitHub; these links point at the commit this page was built from.
Canary: common questions
What microcontroller does the Canary use?
The Canary is built around the ESP32-S3-WROOM-1-N8, from the ESP32 family.
How big is the Canary PCB?
The Canary measures 100 × 81 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Canary?
76 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 Canary design files?
From the stoatworks-labs/canary 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 Canary design in my own project?
Yes, under the terms of its CERN-OHL-S-2.0 license, which stoatworks-labs chose for the repository.
Can I test firmware for the Canary 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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