Air
About the Air PCB
Air is an open source PCB design by marmbrus, published on GitHub. It is a 4-layer board measuring 70 × 70 mm, with 39 components from 14 distinct parts.
Other key parts include the TPS7A2033PDBVR, ADS1115IDGS, LMP91000SDX/NOPB and SCD41-D-R2. By type, the board carries 24 capacitors, 6 resistors, 5 ICs, 2 transistors and 2 connectors.
It belongs with the sensors designs in this gallery.
From the project
A compact ESP32-S3–based room sensor board integrating multiple environmental and motion sensors, addressable RGB LEDs, USB‑C connectivity, and regulated 3.3 V power.
A compact ESP32-S3–based room sensor board integrating multiple environmental and motion sensors, addressable RGB LEDs, USB‑C connectivity, and regulated 3.3 V power.
Notes: - Budget up to ~60 mA per LED at full‑white (worst case). 36 LEDs ⇒ up to ~2.16 A at the LED supply voltage
Main components on the Air
Air bill of materials (BOM)
39 components, 14 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | TPS7A2033PDBVR | SOT-23-5_L2.9-W1.6-P0.95-LS2.8-BR | U201, U401 |
| 1 | ADS1115IDGS | TSSOP-10_3x3mm_P0.5mm | U301 |
| 1 | LMP91000SDX/NOPB | WSON-14_L4.0-W4.0-P0.50-BL-EP-1 | U302 |
| 1 | SCD41-D-R2 | Sensirion_SCD4x-1EP_10.1x10.1mm_P1.25mm_EP4.8x4.8mm | U501 |
| 2 | BSS138 | SOT-23 | Q701, Q702 |
| 1 | C133065 SM06B-GHS-TB(LF)(SN) | CONN-TH_SM06B-GHS-TB-LF-SN | CN601 |
| 1 | C160404 SM04B-SRSS-TB (LF)(SN) | CONN-SMD_4P-P1.00_SM04B-SRSS-TB-LF-SN | CN701 |
| 4 | 4.7UF 4.7uF | C_0603_1608Metric | C201, C204, C401, C404 |
| 8 | 1UF 1uF | C_0603_1608Metric | C202, C203, C301, C303, C305, C402, C403, C603 |
| 6 | 100NF 100nF | C_0603_1608Metric | C302, C304, C504, C505, C604, C702 |
| 6 | 10UF 10uF | C_0603_1608Metric | C501, C502, C503, C601, C602, C701 |
| 3 | 10K 10k | R_0603_1608Metric | R201, R302, R401 |
| 1 | 1k | R_0603_1608Metric | R301 |
| 2 | 4.7K 4.7k | R_0603_1608Metric | R701, R702 |
Air design files
The KiCad project lives in the marmbrus/circuits repository on GitHub; these links point at the commit this page was built from.
- Layoutair/air.kicad_pcb
- Schematicair/air.kicad_sch
- BOMair/production/bom.csv
Air: common questions
How big is the Air PCB?
The Air measures 70 × 70 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Air?
39 components, from 14 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 Air design files?
From the marmbrus/circuits 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 Air design in my own project?
The repository has no license, so all rights stay with marmbrus. Use it as a reference, and ask the author before reusing the design.
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