Doorbell controller
About the Doorbell controller PCB
Doorbell controller is an open source ESP32 PCB design by gunnarbeutner, published on GitHub under the MIT license. It is a 4-layer board measuring 64 × 59 mm, with 102 components from 44 distinct parts.
Its main chip is the ESP32-S3-WROOM-1U-N16R8, from the ESP32 family. Other key parts include the SGM2212-3.3, ES8311 and LP5907MFX-3.3/NOPB. By type, the board carries 41 resistors, 23 capacitors, 17 diodes, 6 relays, 4 ICs and 4 switches.
From the project
doorbell.kicadsch / doorbell.kicadpcb are the authoritative source — edit them in KiCad. build.sh never authors copper; it runs the checks KiCad's own DRC/ERC can't express and exports the fab outputs:
doorbell.kicadsch / doorbell.kicadpcb are the authoritative source — edit them in KiCad. build.sh never authors copper; it runs the checks KiCad's own DRC/ERC can't express and exports the fab outputs:
tools/doorbelldesign.py holds the placement constants checkpcb.py verifies — connector edge fit/overhang and the mounting-hole MLCC keep-out; the KiCad files are authoritative for the rest. The board is hand-routed in KiCad; route.py fails the build on any unrouted connection or any copper-thieving float island over the sliver limit (≥ 2 mm² or ≥ 10 mm) — fix those in KiCad, never with a tool.
Main components on the Doorbell controller
Doorbell controller bill of materials (BOM)
102 components, 44 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ESP32-S3-WROOM-1U-N16R8 | ESP32-S3-WROOM-1U | U1 |
| 1 | SGM2212-3.3 | SOT-223-3_L6.5-W3.4-P2.30-LS7.0-BR | U2 |
| 1 | ES8311 | WQFN-20_L3.0-W3.0-P0.40-BL-EP1.7 | U3 |
| 1 | LP5907MFX-3.3/NOPB LP5907MFX-3.3 Texas Instruments | SOT-23-5 | U4 |
| 2 | AO3400A Alpha & Omega Semicon | SOT-23 | Q3, Q4 |
| 1 | SM04B-SRSS-TB(LF)(SN) USB-JST JST | JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J1 |
| 1 | DB125-3.5-5P-GN-S WF26 bus DORABO(地博电气) | CONN-TH_5P-P3.50_DORABO_DB125-3.5-5P-GN-S | J2 |
| 1 | 1A fast (466) | Fuse_1206_3216Metric | F1 |
| 1 | GAQW212GS SUPSiC(国晶微半导体) | SOP-8_L9.8-W4.4-P2.54-LS6.8-BL | K1 |
| 1 | GAQY212GS SUPSiC(国晶微半导体) | SOP-4_L4.3-W4.4-P2.54-LS6.8-TR | K2 |
| 3 | GAQY412EH SUPSiC(国晶微半导体) | SMD-4_L4.8-W6.4-P2.54-LS9.6-BL | K3, K4, K6 |
| 1 | G6K-2F-Y DC12 | Relay_DPDT_Omron_G6K-2F-Y | K5 |
| 2 | TLP293(GB-TPL,E TLP293 (GB) Toshiba | SOP-4_L4.4-W2.8-P1.27-LS7.0-BR | OC1, OC2 |
| 1 | TS-1088-AR02016 BOOT | SW_TS-1088-AR02016 | SW1 |
| 1 | TS-1088-AR02016 RST | SW_TS-1088-AR02016 | SW2 |
| 1 | SPPJ322300 Tueroeffner (door release) ALPSALPINE(阿尔卑斯阿尔派) | SW-TH_SPPJ322300 | SW3 |
| 1 | SPPJ322300 Sprechen/Hoeren (talk) ALPSALPINE(阿尔卑斯阿尔派) | SW-TH_SPPJ322300 | SW4 |
| 1 | 1N4004W R+O | SOD-123FL_L2.7-W1.8-LS3.8-RD | D1 |
| 4 | H24VND3BA hongjiacheng | D_SOD-323 | D2, D3, D7, D12 |
| 1 | SS14 | D_SMA | D4 |
Show 24 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TPD2S017DBVR TPD2S017 | SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL | D5 |
| 1 | KT-0603R STATUS | D_0603 | D6 |
| 3 | 1N4148W | D_SOD-123 | D8, D9, D11 |
| 1 | SMF5.0A | D_SOD-123FL | D10 |
| 5 | LMBR01S30ST5G Leshan Radio Company (LRC) | X3-DFN0603-2_L0.6-W0.3-RD | D13, D14, D16, D17, D18 |
| 8 | CL10A106KP8NNNC 10uF | C_0603 | C2, C3, C4, C10, C11, C12, C23, C24 |
| 7 | CL10A105KB8NNNC 1uF | C_0603 | C5, C13, C14, C15, C16, C17, C18 |
| 6 | CC0603KRX7R9BB104 100nF | C_0603 | C6, C7, C8, C9, C22, C25 |
| 1 | EEEFK1H220P 22uF/50V Panasonic Industry | CAP-SMD_BD6.3-L6.6-W6.6-FD | C19 |
| 1 | CL10A225KO8NNNC 2.2uF | C_0603 | C20 |
| 2 | 0603WAF5101T5E 5.1k | R_0603 | R1, R2 |
| 6 | 220 UNI-ROYAL(Uniroyal Elec) | R_0603 | R4, R5, R6, R21, R24, R34 |
| 7 | 10k UNI-ROYAL(Uniroyal Elec) | R_0402 | R7, R8, R9, R12, R35, R41, R42 |
| 5 | 0603WAF1002T5E 10k | R_0402 | R10, R11, R18, R19, R20 |
| 3 | 0603WAF1001T5E 1k | R_0603 | R15, R27, R43 |
| 2 | 2.2k UNI-ROYAL(Uniroyal Elec) | R_0603 | R16, R26 |
| 6 | 100k | R_0603 | R17, R36, R38, R39, R40, R44 |
| 2 | 0402WGF1202TCE 12k | R_0402 | R22, R23 |
| 1 | 10M UNI-ROYAL(Uniroyal Elec) | R_0603 | R25 |
| 1 | 0603WAF2201T5E 2.2kΩ | R_0603 | R28 |
| 1 | 0603WAF2201T5E 2.2k | R_0603 | R29 |
| 2 | 0603WAF2202T5E 22k | R_0603 | R30, R31 |
| 2 | 0603WAF3301T5E 3.3k | R_0603 | R32, R33 |
| 1 | 0603WAF2200T5E 220 UNI-ROYAL(Uniroyal Elec) | R_0603_1608Metric | R37 |
Doorbell controller design files
The KiCad project lives in the gunnarbeutner/doorbell repository on GitHub; these links point at the commit this page was built from.
- Layoutkicad/doorbell.kicad_pcb
- Schematickicad/doorbell.kicad_sch
Doorbell controller: common questions
What microcontroller does the Doorbell controller use?
The Doorbell controller is built around the ESP32-S3-WROOM-1U-N16R8, from the ESP32 family.
How big is the Doorbell controller PCB?
The Doorbell controller measures 64 × 59 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Doorbell controller?
102 components, from 44 distinct parts. The full bill of materials is listed on this page.
Where can I download the Doorbell controller design files?
From the gunnarbeutner/doorbell repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Doorbell controller design in my own project?
Yes, under the terms of its MIT license, which gunnarbeutner chose for the repository.
Can I test firmware for the Doorbell controller 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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