2 layers87 × 87 mm
Esp thermostat
tomikaa87/esp-thermostat
Smart WiFi thermostat based on the well-known ESP8266 SoC.
59 parts7GPL-3.0
2 layers
Esp32-door buzzer
nomis/esp32-door-buzzer-pcbESP32 Door Buzzer PCB (actually breadboard)
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 11
- Nets
- 47
- Pads
- 72
- Tracks, vias
- 57, 0
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 6 Apr 2026
- Updated
- 27 Jun 2026
Overview
Esp32-door buzzer is an open-source printed circuit board by nomis, from the nomis/esp32-door-buzzer-pcb repository on GitHub. It is a 2-layer board with 11 parts on 47 nets, routed with 57 tracks and 0 vias.
It is built around the ESP32-S3 and HK4100F-DC5V-SHG. Its parts include 4 connectors, 2 ICs, 2 diodes, 1 resistor and 1 transistor. It belongs with the ESP32 boards of this library.
Main components
2
ESP32-S3
QFN-56-EP(7x7)-40℃~+105℃ -98.4dBm 150Mbps 2.412GHz~2.484GHz 2.4GHz 21dBm 340mA 3V~3.6V 88mA SPI、USB、UART、ADC、I2C、I2S、PWM WiFi transceiver QFN-56-EP(7x7) RF Transceiver ICs ROHSEspressif SystemsRF Transceiver ICs
HK4100F-DC5V-SHG
DIP,14.5x10.5mm-25℃~+70℃ 100mΩ 125Ω 200mW 3A@30VDC、3A@250VAC 4ms 5V 6ms One set changeover: 1C (SPDT - changeover) DIP,14.5x10.5mm Power Relays ROHS汇科Power Relays
README
README.rstESP32 Door Buzzer
Overview
Schematic to connect an ESP32-S3 to a door buzzer and door lock.
Purpose
Use an ESP32-S3 to release the door lock and monitor when the door buzzer is pressed.
The 12V AC from the buzzer is converted to DC and regulated to 5V for use with the optocoupler.
The normally open relay releases the door lock by connecting 0V AC to complete the unlocking circuit.
Usage
This is a KiCad project. The PCB only exists to plan the breadboard layout to minimise the number of wires.
Software for the ESP32-S3 <https://github.com/nomis/esp32-door-buzzer>_
Schematic
Header J3 is aligned to match the K1 relay on a breadboard.
Header J4 is for future use to allow the ESP32-S3 to connect/disconnect the phone buzzer.
.. image:: render/esp32-door-buzzer-sch.svg :alt: Schematic
Components
+---------------------+----------+--------------------------------------------------------------+ | Refs | Quantity | Name | +=====================+==========+==============================================================+ | C1 | 1 | 100µF Capacitor, Through Hole | +---------------------+----------+--------------------------------------------------------------+ | C2 | 1 | 0.1µF Capacitor, Through Hole | +---------------------+----------+--------------------------------------------------------------+ | D1 | 1 | Multicomp MP606G Bridge Rectifier, Through Hole | +---------------------+----------+--------------------------------------------------------------+ | D2 | 1 | 1N4004 Diode, Through Hole | +---------------------+----------+--------------------------------------------------------------+ | J1, J2 | 2 | 1x20 Pin Socket, Through Hole (2.54mm) | +---------------------+----------+--------------------------------------------------------------+ | J3 | 1 | 1x06 Pin Header, Through Hole (2.54mm) | +---------------------+----------+--------------------------------------------------------------+ | J4 | 2 | 1x02 Pin Header, Through Hole (2.54mm) | +---------------------+----------+--------------------------------------------------------------+ | K1 | 1 | HUI KE HK4100F 5V Relay, Through Hole | +---------------------+----------+--------------------------------------------------------------+ | Q1 | 1 | ON Semiconductor BS170 N-Channel MOSFET, TO-92-3 | +---------------------+----------+--------------------------------------------------------------+ | R1 | 1 | 390Ω Resistor, Through Hole | +---------------------+----------+--------------------------------------------------------------+ | R2 | 1 | 10kΩ Resistor, Through Hole | +---------------------+----------+--------------------------------------------------------------+ | R3 | 1 | 1kΩ Resistor, Through Hole | +---------------------+----------+--------------------------------------------------------------+ | U1 | 1 | ON Semiconductor FOD817 Optocoupler, DIP-4 | +---------------------+----------+--------------------------------------------------------------+ | U2 | 1 | STMicroelectronics L78L12 Voltage Regulator, TO-92-3 | +---------------------+----------+--------------------------------------------------------------+
Parts
11| Qty | Value | Footprint | References |
|---|---|---|---|
| 2 | ESP32-S3 | Connector_PinSocket_2.54mm:PinSocket_1x20_P2.54mm_Vertical | J1, J2 |
| 1 | 1N4004 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D2 |
| 1 | 390Ω | Resistor_THT:R_Axial_DIN0922_L20.0mm_D9.0mm_P25.40mm_Horizontal | R1 |
| 1 | Conn_01x02_Pin | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J4 |
| 1 | Conn_01x06_Pin | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J3 |
| 1 | D_Bridge_+A-A | Diode_THT:Diode_Bridge_15.1x15.1x6.3mm_P10.9mm | D1 |
| 1 | HK4100F-DC5V-SHG | Relay_THT:Relay_SPDT_CUI_SR5 | K1 |
| 1 | L78L12_TO92 | Package_TO_SOT_THT:TO-92_Inline_Wide | U2 |
| 1 | NMOS | Package_TO_SOT_THT:TO-92_Inline_Wide | Q1 |
| 1 | Optocoupler_DC_PhotoNPN_AKEC | Package_DIP:DIP-4_W10.16mm | U1 |
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Questions
What parts does the Esp32-door buzzer use?
11 parts, built around the ESP32-S3 and HK4100F-DC5V-SHG. 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 Esp32-door buzzer KiCad files?
From the nomis/esp32-door-buzzer-pcb repository on GitHub, at the commit this page was made from: the board is esp32-door-buzzer.kicad_pcb and its schematic esp32-door-buzzer.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Esp32-door buzzer design in my own project?
Its repository states no licence, so its author keeps all rights: ask nomis before reusing the design.