2 layers60 × 60 mm
Minico2
artemist/minico2
A simple CO2 monitor based on the Sensirion SCD-30 and an ESP32. This is intended to have Wi-Fi and Ethernet thought that is not yet implemented
46 parts
2 layers59.2 × 39.4 mm
Scd30 esp
Duckle29/InKli1An ESP32-WROOM32 backpack for an SCD30. Uses a high effeciency Buck converter to try and avoid self heating.
- Size
- 59.2 × 39.4 mm
- Copper layers
- 2
- Thickness
- 1.58 mm
- Parts
- 63
- Nets
- 75
- Pads
- 274
- Tracks, vias
- 623, 196
- Pours
- 7
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 28 Dec 2024
- Updated
- 3 Nov 2026
Overview
Scd30 esp is an open-source printed circuit board by Duckle29, from the Duckle29/InKli repository on GitHub. It is a 2-layer board of 59.2 × 39.4 mm with 63 parts on 75 nets, routed with 623 tracks and 196 vias.
It is built around the CH340C, SCD30 and BSS138PS, with the SI1308EDL among its other parts. Its parts include 19 capacitors, 17 resistors, 7 diodes, 4 ICs and 4 transistors. It belongs with the ESP32 boards of this library.
Main components
4
CH340C
SOP-16-20℃~+70℃ 2Mbps 3.3V、5V 50uA 7mA Transceiver USB 2.0 SOP-16 USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB ConvertersSCD30
-0ppm~40000ppm 0℃~+50℃ 19mA 23mm 3.3V~5.5V 35mm 7mm Carbon dioxide Multi-gas detection capability UART、I2C、PWM ±3% - Gas Sensors ROHSSensirionGas Sensors
BSS138PS
SOT-363(SC-88)1.5V 1.6Ω@10V 2 N-Channel 320mA 420mW 50pF 60V 800pC@4.5V SOT-363(SC-88) MOSFETs ROHSNexperiaMOSFETs
SI1308EDL
SC-70-3-55℃~+150℃ 1 N-channel 1.4nC@10V 1.5A 1.5V 105pF 11pF 132mΩ@10V 23pF 30V 400mW N-Channel SOT-323 MOSFETs ROHSVishay IntertechnologyMOSFETs
README
pcb/README.mdSCD30 ESP32 backback
This is a small PCB combining an ESP32 WROOM module with an SCD30. It's intended to be USB powered, and has the option to mount a CH340C if you want on-board USB<>serial.
It's intended for use with ESPHome or similar.
Parts
63| Qty | Value | Footprint | References |
|---|---|---|---|
| 10 | 1uF | Capacitor_SMD:C_0603_1608Metric | C5, C10, C11, C12, C13, C14, C15, C16, C17, C18 |
| 5 | 10k | Resistor_SMD:R_0603_1608Metric | R3, R7, R10, R13, R14 |
| 4 | 2k2 | Resistor_SMD:R_0603_1608Metric | R8, R9, R12, R15 |
| 4 | NSR0530HT1G | Diode_SMD:D_SOD-323 | D1, D2, D3, D4 |
| 3 | 22uF | Capacitor_SMD:C_0805_2012Metric | C2, C6, C7 |
| 2 | 0.1uF | Capacitor_SMD:C_0402_1005Metric | C4, C20 |
| 2 | 3R | Resistor_SMD:R_1206_3216Metric | R11, R16 |
| 2 | 4u7 | Capacitor_SMD:C_0805_2012Metric | C8, C9 |
| 2 | 5k1 | Resistor_SMD:R_0603_1608Metric | R4, R5 |
| 2 | LED_Small | LED_SMD:LED_Vishay_VSMB2943SL | D5, D6 |
| 2 | Q_NMOS_GSD | Package_TO_SOT_SMD:SOT-23 | Q2, Q4 |
| 1 | 120pF | Capacitor_SMD:C_0402_1005Metric | C1 |
| 1 | 1k | Resistor_SMD:R_0603_1608Metric | R17 |
| 1 | 1uH | Inductor_SMD:L_1008_2520Metric | L1 |
| 1 | 24P P0.5mm waveshare E-paper display | FCI fpc:AMPHENOL_SFV24R-4STE1HLF | J3 |
| 1 | 360k | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 3R | Resistor_SMD:R_0603_1608Metric | R6 |
| 1 | 4.7uF | Capacitor_SMD:C_0805_2012Metric | C3 |
| 1 | 68uF | Inductor_SMD:L_1210_3225Metric | L2 |
| 1 | 82k | Resistor_SMD:R_0603_1608Metric | R1 |
| 1 | BSS138PS | Package_TO_SOT_SMD:SOT-363_SC-70-6 | Q3 |
| 1 | CH340C | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U3 |
| 1 | ESP32-WROOM-E | PCM_Espressif:ESP32-WROOM-32E | U2 |
| 1 | LED_Small | LED_SMD:LED_0603_1608Metric | D7 |
| 1 | LOGO | graphics:kiwi | G*** |
| 1 | QWIIC | Connector_JST:JST_SH_SM04B-SRSS-TB_1x04-1MP_P1.00mm_Horizontal | J4 |
| 1 | SCD30 | Connector_PinHeader_2.54mm:PinHeader_1x07_P2.54mm_Vertical | J1 |
| 1 | SW_SPST | Button_Switch_SMD:SW_SPST_EVQP2 | SW1 |
| 1 | Si1308EDL | Package_TO_SOT_SMD:SOT-323_SC-70 | Q1 |
| 1 | TPS62A01PDDCR | Package_TO_SOT_SMD:SOT-23-6 | U1 |
| 1 | TSOP38G36 | OptoDevice:Vishay_MINICAST-3Pin | U4 |
| 1 | Touch TP | TestPoint:TestPoint_Pad_D1.0mm | TP1 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J2 |
The 60 most common of 63 parts.
Questions
How big is the Scd30 esp PCB?
It measures 59.2 × 39.4 mm and has 2 copper layers, 1.58 mm thick.
What parts does the Scd30 esp use?
63 parts, built around the CH340C, SCD30, BSS138PS and SI1308EDL. 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 Scd30 esp KiCad files?
From the Duckle29/InKli repository on GitHub, at the commit this page was made from: the board is pcb/scd30_esp.kicad_pcb and its schematic pcb/scd30_esp.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Scd30 esp design in my own project?
Its repository states no licence, so its author keeps all rights: ask Duckle29 before reusing the design.
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