4 layers31.4 × 70 mm
UPLC Panel
fredriknk/uPLC-Stack
Quick note, this is then panelization repo, head for the individual repos to get design files.
226 parts9
4 layers31.4 × 22 mm
I now have two prototypes of the uPLC-Relay so ESP-Home integrations will come soon.
- Size
- 31.4 × 22 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 53
- Nets
- 36
- Pads
- 139
- Tracks, vias
- 357, 86
- Pours
- 12
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 19 Feb 2024
- Updated
- 9 Apr 2025
Overview
Uplc is an open-source printed circuit board by fredriknk, from the fredriknk/uPLC-Relay repository on GitHub, published under the MIT licence. It is a 4-layer board of 31.4 × 22 mm with 53 parts on 36 nets, routed with 357 tracks and 86 vias.
It is built around the ESP32-C3-WROOM-02-N4, AP63201WU and TBD62003AFWG, with the 1N5819WS, 0402CG200J500NT and G6K-2F-Y-5V among its other parts. Its parts include 12 resistors, 9 capacitors, 3 ICs, 3 diodes and 2 connectors. It belongs with the ESP32 and RISC-V boards of this library.
Main components
10
ESP32-C3-WROOM-02-N4
SMD,20x18mm-105dBm -40℃~+85℃ 2.4GHz 20.5dBm 345mA 3V~3.6V 82mA Bluetooth5.0 ESP32-C3 Chip Integrated Bluetooth function、Support USB interface On-board PCB Antenna UART、SPI、I2C、I2S、JTAG、USB SMD,20x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
AP63201WU
TSOT-23-6-40℃~+85℃ 1 22uA 2A 3.8V~32V 500kHz Adjustable Buck Built-in Overcurrent Protection、Light load efficient mode、Cycle-by-cycle current limiting、Hiccup current limiting、EMI optimization (spread spectrum) Step-down type Yes TSOT-23-6 DC-DC Converters ROHSDiodes IncorporatedDC-DC Converters
TBD62003AFWG
SOP-16-40℃~+85℃ 50V 500mA/ch 7‑channel sink DMOS transistor array, SOP‑16, RoHSToshibaDarlington Transistor Arrays
1N5819WS
SOD-3231 Independent 1A 25A 40V 500uA@40V 600mV@1A SOD-323 Schottky Diodes ROHSGuangdong HottechSchottky Diodes
0402CG200J500NT
040220pF 50V C0G ±5% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSGuangdong Fenghua Advanced Tech (FH)Multilayer Ceramic Capacitors MLCC - SMD/SMT
G6K-2F-Y-5V
SMD,10x6.5mm-40℃~+70℃ 100mW 100mΩ 1A 237Ω 300mA@125VAC、1A@30VDC 3ms 3ms 5V 60V@DC、125V@AC Silver+gold alloy Two groups of conversions: 2C(Double-pole double-throw conversion) SMD,10x6.5mm Signal Relays ROHSOmronSignal Relays
GRM21BR6YA106KE43L
080510uF 35V X5R ±10% 0805 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSMurataMultilayer Ceramic Capacitors MLCC - SMD/SMT
Q13FC13500004
SMD3215-2P-40℃~+85℃ 12.5pF 32.768kHz 70kΩ SMD crystal oscillator ±20ppm SMD3215-2P Crystals ROHSSeiko EpsonCrystals
LQM2HPN4R7MG0L
10081.1A 138mΩ 25MHz 4.7uH Multilayer inductor ±20% 1008 Inductors (SMD) ROHSMurataInductors (SMD)
SM12B-GHS-TB(LF)(SN)
SMD,P=1.25mm,卧贴-25℃~+85℃ 1 1.25mm 12 12P 18.25mm 1A 1x12P 4.13mm 4.25mm 50V Auxiliary Solder Pin GH PA9T Phosphor bronze Surface Mount, Right Angle Tin UL94V-0 White SMD,P=1.25mm,卧贴 Wire To Board Connector ROHSJSTWire To Board Connector
README
README.mdμPLC-Relay
Pcbway Sponsorship
Thanks so much to PCBWay who offered to assemble my first prototype batch of all three uPLC modules. They deliver awesome quality as always, see the result for yourself below.
I now have two prototypes of the uPLC-Relay so ESP-Home integrations will come soon.
ESP micro PLC the size of a post stamp. he uPLC-relay version has two small signal relay module utilizing an ESP-32-C3 wifi, bluetooth module for communication and MCU, it has a 0-24V buck regulator, has two 2.5-25V inputs, two 25v, 100/50ma high speed open drain output through a TBD062003 DMOS transistor array ic. And two relay outputs are capable of driving around 25V 500ma.
Thanks to u/PricelessToolkit/ESPClicker for inspiration.
Specifications
| Parameter | Description |
|---|---|
| Input voltage | 3.8-24v |
| Current | TBD Wifi: ##mA, Radio Off: ##mA, Deep sleep ##uA |
| Communication | 2.4ghz WIFI, Uart TTL |
| Baudrate | 115200 |
| PCB size | 22x31.1mm |
| PCB info | 1.6mm FR4, HASL lead free, 4 layer |
| Case size | XxXxXmm TBD |
Connector
| Label | GPIO | Description |
|---|---|---|
| R2NO | GPIO5 | Relay 1 Normally Open |
| R2CO | GPIO5 | Relay 1 COM |
| R2NC | GPIO5 | Relay 1 Normally Closed |
| R1NO | GPIO6 | Relay 1 Normally Open |
| R1CO | GPIO6 | Relay 1 COM |
| R1NC | GPIO6 | Relay 1 Normally Closed |
| HI2 | GPIO19 | 2.5-25v input |
| HI1 | GPIO18 | 2.5-25v input |
| HO2 | GPIO3 | 25v 50ma open drain output |
| HO1 | GPIO7 | 25v 100ma open drain output |
| 4-24V | 3V3 | 4-24v |
| GND | GND | Ground |
PCB Pictures
PCB assembly by PCBWay
Homeassistant Implementation
TODO
FIRST PRODUCTION PROTOTYPE
TODO
Parts
53| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 10K | Resistor_SMD:R_0402_1005Metric | R1, R2, R4, R5, R7, R8, R9, R10, R11, R12 |
| 3 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C2, C3, C9 |
| 3 | 1N5819WS | Diode_SMD:D_SOD-323 | D1, D2, D4 |
| 3 | 22uf | Capacitor_SMD:C_0402_1005Metric | C8, C11, C12 |
| 2 | 20pf | Capacitor_SMD:C_0402_1005Metric | C1, C4 |
| 2 | G6K-2F-Y | Relay_SMD:Relay_DPDT_Omron_G6K-2F-Y | K1, K2 |
| 1 | 10uF | Capacitor_SMD:C_0805_2012Metric | C5 |
| 1 | 182k | Resistor_SMD:R_0402_1005Metric | R14 |
| 1 | 32.768khz 3215 12.5pf | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | 4.7uH | Inductor_SMD:L_1008_2520Metric | L1 |
| 1 | 62k | Resistor_SMD:R_0402_1005Metric | R15 |
| 1 | AP63201WU | Package_TO_SOT_SMD:TSOT-23-6 | U1 |
| 1 | Conn_01x06_Pin | TestPoint:TestPoint_Pad_1.0x1.0mm_6pad | J1 |
| 1 | ESP32-C3-WROOM-02 | PCM_Espressif:ESP32-C3-WROOM-02 | U3 |
| 1 | G*** | esprelay:kibuzzard-65D361F2 | kibuzzard-65D361F2 |
| 1 | G*** | kibuzzard-65D71774 | kibuzzard-65D71774 |
| 1 | G*** | esprelay:kibuzzard-65D3616E | kibuzzard-65D3616E |
| 1 | G*** | esprelay:kibuzzard-65D361E9 | kibuzzard-65D361E9 |
| 1 | G*** | esprelay:kibuzzard-65D361E1 | kibuzzard-65D361E1 |
| 1 | G*** | esprelay:kibuzzard-65D361D3 | kibuzzard-65D361D3 |
| 1 | G*** | esprelay:kibuzzard-65D46022 | kibuzzard-65D46022 |
| 1 | G*** | kibuzzard-65D49092 | kibuzzard-65D49092 |
| 1 | G*** | esprelay:kibuzzard-65D361B0 | kibuzzard-65D361B0 |
| 1 | G*** | esprelay:kibuzzard-65D361A7 | kibuzzard-65D361A7 |
| 1 | G*** | esprelay:kibuzzard-65D3620E | kibuzzard-65D3620E |
| 1 | G*** | esprelay:kibuzzard-65D3619D | kibuzzard-65D3619D |
| 1 | G*** | esprelay:kibuzzard-65D36206 | kibuzzard-65D36206 |
| 1 | G*** | kibuzzard-65D7177B | kibuzzard-65D7177B |
| 1 | G*** | esprelay:kibuzzard-65D36177 | kibuzzard-65D36177 |
| 1 | G*** | esprelay:kibuzzard-65D460A0 | kibuzzard-65D460A0 |
| 1 | G*** | esprelay:kibuzzard-65D361FD | kibuzzard-65D361FD |
| 1 | G*** | kibuzzard-65D6FF37 | kibuzzard-65D6FF37 |
| 1 | G*** | kibuzzard-65D7176D | kibuzzard-65D7176D |
| 1 | G*** | esprelay:kibuzzard-65D46066 | kibuzzard-65D46066 |
| 1 | SM12B-GHS-TB(LF)(SN) | Connector_JST:JST_GH_SM12B-GHS-TB_1x12-1MP_P1.25mm_Horizontal | J2 |
| 1 | TBD62003AFWG | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U2 |
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Questions
How big is the Uplc PCB?
It measures 31.4 × 22 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Uplc use?
53 parts, built around the ESP32-C3-WROOM-02-N4, AP63201WU, TBD62003AFWG and 1N5819WS. 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 Uplc KiCad files?
From the fredriknk/uPLC-Relay repository on GitHub, at the commit this page was made from: the board is CAD/uplc/uplc.kicad_pcb and its schematic CAD/uplc/uplc.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Uplc design in my own project?
Its repository publishes it under the MIT licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).