Exhaust mic
About the Exhaust mic PCB
Exhaust mic is an open source ESP32 PCB design by HasiKe, published on GitHub. It is a 4-layer board measuring 72 × 55 mm, with 133 components from 65 distinct parts.
Its main chip is the ESP32-S3-WROOM-1-N8R2, from the ESP32 family. Other key parts include the LM5164DDAT, NCP1117ST33T3G, LP5907MFX-3.3/NOPB, PCM1863QDBTRQ1 and DS3231SN#. By type, the board carries 45 capacitors, 38 resistors, 15 diodes, 7 ICs, 7 connectors and 6 inductors.
It belongs with the iot & wireless designs in this gallery.
From the project
Motorcycle Exhaust and Intake Microphone for best soud on Videos.
Zweikanaliger 24-Bit-Tonrekorder für Motor- und Auspuffgeräusche. Zwei Mikrofonköpfe mit 135 dBSPL Grenzschalldruck an einem Stereo-ADC, aufgezeichnet von einem ESP32-S3 auf microSD — mit Zeitstempeln, die sich im Schnittprogramm von selbst auf das Videomaterial legen.
Gebaut für eine Suzuki Hayabusa: Kopf A am Endrohr, Kopf B in der Airbox.
Alle Kabelstecker sitzen an der oberen Kante und zeigen nach außen, USB-C und microSD liegen rechts hinter einer gemeinsamen Serviceklappe, Leuchtdioden und Taster an der unteren Kante. Auf der Rückseite steht nichts über 2,7 mm — der Aufbau bleibt mit…
Main components on the Exhaust mic
Exhaust mic bill of materials (BOM)
133 components, 65 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | LM5164DDAT LM5164DDA | SOIC-8-1EP_3.9x4.9mm_P1.27mm_EP2.29x3mm | U1 |
| 1 | NCP1117ST33T3G NCP1117ST33 | SOT-223-3_TabPin2 | U2 |
| 1 | LP5907MFX-3.3/NOPB LP5907MFX-3.3 | SOT-23-5 | U3 |
| 1 | PCM1863QDBTRQ1 PCM1863DBT | TSSOP-30_4.4x7.8mm_P0.5mm | U5 |
| 1 | ESP32-S3-WROOM-1-N8R2 | ESP32-S3-WROOM-1 | U6 |
| 1 | DS3231SN# DS3231SN | SOIC-16W_7.5x10.3mm_P1.27mm | U7 |
| 1 | SN65HVD230QDG4Q1 SN65HVD230Q | SOIC-8_3.9x4.9mm_P1.27mm | U8 |
| 1 | SI2309CDS-T1-GE3 SI2309CDS | SOT-23 | Q1 |
| 2 | T2N7002BK,LM 2N7002 | SOT-23 | Q3, Q4 |
| 1 | ASEMB-24.576MHZ-LC-T 24.576MHz | Oscillator_SMD_Abracon_ASE-4Pin_3.2x2.5mm | Y1 |
| 1 | S6B-XH-A JST_XH_6pol | JST_XH_S6B-XH-A_1x06_P2.50mm_Horizontal | J1 |
| 1 | S5B-XH-A JST_XH_5pol_MicA | JST_XH_S5B-XH-A_1x05_P2.50mm_Horizontal | J2 |
| 1 | S5B-XH-A JST_XH_5pol_MicB | JST_XH_S5B-XH-A_1x05_P2.50mm_Horizontal | J3 |
| 1 | USB4085-GF-A USB-C | USB_C_Receptacle_GCT_USB4085 | J4 |
| 1 | DM3D-SF microSD_PushPush | microSD_HC_Hirose_DM3D-SF | J5 |
| 1 | PREC005SAAN-RC GPS_unbestueckt | PinHeader_1x05_P2.54mm_Vertical | J6 |
| 1 | PREC004SAAN-RC I2C_Erweiterung | PinHeader_1x04_P2.54mm_Vertical | J7 |
| 1 | 3000TR CR1220 | BatteryHolder_Keystone_3000_1x12mm | BT1 |
| 1 | 0453002.MR 2A_traege | Fuse_1206_3216Metric | F1 |
| 4 | — | H1, H2, H3, H4 |
Show 45 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CPT-9019A-SMT-TR Piezo_9x9_SMD | Buzzer_Murata_PKMCS0909E | LS1 |
| 1 | TL3342F260QG RESET | SW_SPST_TL3342 | SW1 |
| 1 | TL3342F260QG BOOT | SW_SPST_TL3342 | SW2 |
| 1 | TL3342F260QG REC | SW_SPST_TL3342 | SW3 |
| 1 | TL3342F260QG MARK | SW_SPST_TL3342 | SW4 |
| 1 | BZX84C15-7-F BZX84C15 | SOT-23 | D1 |
| 1 | SMBJ36A-13-F SMBJ36A | D_SMB | D2 |
| 2 | PMEG3020EP,115 PMEG3020 | D_SOD-123 | D3, D4 |
| 3 | BZX84C3V3LT1G BZX84C3V3 | SOT-23 | D5, D6, D7 |
| 1 | 1N4148WS-7-F 1N4148WS | D_SOD-323 | D8 |
| 4 | SLPESD3V3L1BA PESD3V3L1BA | D_SOD-123 | D10, D11, D12, D13 |
| 1 | LTST-C190GKT gruen | LED_0603_1608Metric | D20 |
| 1 | LTST-C190KRKT rot | LED_0603_1608Metric | D21 |
| 1 | LTW-170ZDC weiss_Sync | LED_0805_2012Metric | D22 |
| 3 | BLM18AG601SN1D 600R@100MHz | R_0603_1608Metric | FB2, FB3, FB4 |
| 1 | SRN6045TA-220M 22u/1A2 | L_Bourns_SRN6045TA | L1 |
| 2 | 744232222 1mH_CMC | L_CommonMode_Wuerth_WE-SL2 | L2, L3 |
| 2 | GRM21BD72A225ME01K 2u2/100V | C_0805_2012Metric | C1, C2 |
| 1 | 0603B104K101CT 100n/100V | C_0603_1608Metric | C3 |
| 1 | C0603C222K5RACTU 2n2/50V | C_0603_1608Metric | C4 |
| 1 | CL10C101JB8NNNC 100p | C_0603_1608Metric | C5 |
| 2 | CL32A226MAJNNNE 22u/25V | C_1210_3225Metric | C6, C7 |
| 14 | 0603B104K250CT 100n | C_0603_1608Metric | C8, C12, C16, C17, C31, C34, C36, C37 +6 |
| 10 | CL10A105KA8NFNC 1u/16V | C_0603_1608Metric | C9, C10, C13, C14, C23, C24, C28, C29 +2 |
| 2 | CL32A226MOJNNNE 22u/10V | C_1210_3225Metric | C11, C40 |
| 8 | EMK212ABJ106KG-T 10u/10V | C_0805_2012Metric | C15, C20, C25, C32, C33, C35, C41, C45 |
| 4 | CL10C330JB8NNNC 33p | C_0603_1608Metric | C21, C22, C26, C27 |
| 12 | RC0603FR-0710KL 10k | R_0603_1608Metric | R1, R13, R14, R30, R31, R42, R43, R44 +4 |
| 1 | ERJ-3EKF6803V 680k | R_0603_1608Metric | R2 |
| 1 | RC0603FR-07150KL 150k | R_0603_1608Metric | R3 |
| 1 | RMCF0603FT28K7 28k7 | R_0603_1608Metric | R4 |
| 1 | CRCW060334K0FKEAC 34k0 | R_0603_1608Metric | R5 |
| 1 | RMCF0603FT12K0 12k0 | R_0603_1608Metric | R6 |
| 1 | RCWE0805R100FKEA 0R1 | R_0805_2012Metric | R7 |
| 3 | RC0603FR-07100KL 100k | R_0603_1608Metric | R9, R54, R55 |
| 1 | RC0603FR-0747KL 47k | R_0603_1608Metric | R10 |
| 1 | RC0603FR-07470KL 470k | R_0603_1608Metric | R11 |
| 1 | RC0603FR-0768KL 68k | R_0603_1608Metric | R12 |
| 4 | CRCW0603100RFKEA 100R | R_0603_1608Metric | R20, R21, R22, R23 |
| 1 | RC0603FR-0733RL 33R | R_0603_1608Metric | R24 |
| 2 | RMCF0603FT5K10 5k1 | R_0603_1608Metric | R34, R35 |
| 2 | RC0603FR-074K7L 4k7 | R_0603_1608Metric | R40, R41 |
| 1 | RMCF0805FT120R 120R | R_0805_2012Metric | R49 |
| 3 | CRCW06031K00FKEA 1k | R_0603_1608Metric | R50, R51, R52 |
| 1 | RK73H2ATTD18R0F 18R | R_0805_2012Metric | R53 |
Exhaust mic design files
The KiCad project lives in the HasiKe/Exhaust-Mic repository on GitHub; these links point at the commit this page was built from.
- Layoutexhaust-mic.kicad_pcb
- Schematicexhaust-mic.kicad_sch
- BOMoutput/bom-mainboard.csv
Exhaust mic: common questions
What microcontroller does the Exhaust mic use?
The Exhaust mic is built around the ESP32-S3-WROOM-1-N8R2, from the ESP32 family.
How big is the Exhaust mic PCB?
The Exhaust mic measures 72 × 55 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Exhaust mic?
133 components, from 65 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 Exhaust mic design files?
From the HasiKe/Exhaust-Mic 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 Exhaust mic design in my own project?
The repository has no license, so all rights stay with HasiKe. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Exhaust mic 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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