CO2 SENSOR
About the CO2 SENSOR PCB
CO2 SENSOR is an open source ESP32 PCB design by odobot, published on GitHub. It is a 4-layer board measuring 20 × 73.4 mm, with 44 components from 22 distinct parts.
Its main chip is the ESP-WROOM-02, from the ESP32 family. Other key parts include the RT9167A-33GB, BQ24072RGT and CP2102N-AXX-XQFN28. By type, the board carries 18 capacitors, 10 resistors, 7 ICs, 3 connectors, 2 transistors and 2 switches.
It belongs with the sensors designs in this gallery.
Main components on the CO2 SENSOR
CO2 SENSOR bill of materials (BOM)
44 components, 22 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | RT9167A-33GB | SOT94P279X129-5N | U3, U6, U7, U8 |
| 1 | ESP-WROOM-02 | ESP-WROOM-02 | U4 |
| 1 | BQ24072RGT | VQFN-16-1EP_3x3mm_P0.5mm_EP1.6x1.6mm | U5 |
| 1 | CP2102N-AXX-XQFN28 CP2102N-Axx-xQFN28 | QFN-28-1EP_5x5mm_P0.5mm_EP3.35x3.35mm | U9 |
| 2 | BC817 | SOT-23 | Q2, Q3 |
| 1 | USB_C_RECEPTACLE_USB2.0_14P USB_C_Receptacle_USB2.0_14P | USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
| 1 | CONN_01X04_PIN Conn_01x04_Pin | PinHeader_1x04_P2.54mm_Vertical | J4 |
| 1 | Conn_01x08_Pin | lcd | J5 |
| 2 | SW_Push | SW_Tactile_SPST_NO_Straight_CK_PTS636Sx25SMTRLFS | SW1, SW2 |
| 2 | LED | LED_0805_2012Metric | D3, D4 |
| 8 | 1UF 1uF | CP_EIA-6032-20_AVX-F_Pad2.25x2.35mm_HandSolder | C1, C3, C7, C8, C10, C11, C13, C14 |
| 1 | 100NF 100nF | C_0402_1005Metric | C2 |
| 5 | 10NF 10nF | C_0805_2012Metric | C4, C6, C9, C12, C17 |
| 1 | 100NF 100nF | C_0603_1608Metric | C5 |
| 1 | 4.7UF 4.7uF | CP_EIA-6032-20_AVX-F_Pad2.25x2.35mm_HandSolder | C16 |
| 2 | 4.7UF 4.7uF | C_0805_2012Metric | C18, C19 |
| 2 | 10K | R_0805_2012Metric | R6, R7 |
| 2 | 5.1K | R_0402_1005Metric | R8, R9 |
| 2 | 1K | R_0402_1005Metric | R10, R13 |
| 2 | 1.5K | R_0805_2012Metric | R11, R12 |
Show 2 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1.18K 1.18k | R_0402_1005Metric | R14 |
| 1 | 46.4K 46.4k | R_0402_1005Metric | R15 |
CO2 SENSOR design files
The KiCad project lives in the odobot/PCB_DESIGN repository on GitHub; these links point at the commit this page was built from.
CO2 SENSOR: common questions
What microcontroller does the CO2 SENSOR use?
The CO2 SENSOR is built around the ESP-WROOM-02, from the ESP32 family.
How big is the CO2 SENSOR PCB?
The CO2 SENSOR measures 20 × 73.4 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the CO2 SENSOR?
44 components, from 22 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 CO2 SENSOR design files?
From the odobot/PCB_DESIGN 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 CO2 SENSOR design in my own project?
The repository has no license, so all rights stay with odobot. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the CO2 SENSOR 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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