Quad Preamp and 4-Channel Ambisonic Recorder
About the Quad Preamp and 4-Channel Ambisonic Recorder PCB
Quad Preamp and 4-Channel Ambisonic Recorder is an open source NXP PCB design by jdg511, published on GitHub. It is a 4-layer board measuring 138 × 114 mm, with 242 components from 94 distinct parts.
Its main chip is the TEENSY41, from the NXP family. Other key parts include the TPS62160DGKR, TPS7A2033PDBVR, TLE2426IDR, CD4053BPWR and OPA1654AIPWR. By type, the board carries 97 resistors, 92 capacitors, 19 diodes, 13 ICs, 9 connectors and 4 transistors.
It belongs with the audio and power & battery designs in this gallery.
From the project
Quad Preamp and Recorder project
Compact four-channel ambisonic electret preamp, 192 kHz/24-bit recorder, real-time binaural monitor, and touchscreen controller.
The hardware is derived from jdg511/Quadelectretpre and is redesigned as a mixed-signal two-layer PCB in a Hammond 1590XX enclosure.
- hardware/ — KiCad project, fabrication package, design notes, and reviews. - tools/ — reproducible schematic, PCB, and fabrication-generation scripts. - firmware/ — recorder/DSP interface, pin map, file-naming rules, and implementation requirements. Production firmware is not included in Rev A.
Main components on the Quad Preamp and 4-Channel Ambisonic Recorder
Quad Preamp and 4-Channel Ambisonic Recorder bill of materials (BOM)
242 components, 94 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TPS62160DGKR TPS62160DGK Texas Instruments | VSSOP-8_3x3mm_P0.65mm | U1 |
| 1 | TPS7A2033PDBVR TPS7A2033PDBV Texas Instruments | SOT-23-5 | U2 |
| 1 | TLE2426IDR TLE2426ID Texas Instruments | SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 2 | CD4053BPWR CD4053BPW Texas Instruments | TSSOP-16_4.4x5mm_P0.65mm | U4, U5 |
| 1 | OPA1654AIPWR OPA1654 Texas Instruments | TSSOP-14_4.4x5mm_P0.65mm | U6 |
| 1 | PCM1864DBTR PCM1864DBT Texas Instruments | TSSOP-30_4.4x7.8mm_P0.5mm | U7 |
| 1 | TEENSY41 Teensy 4.1 PJRC | Teensy41_Socket | U8 |
| 1 | PCM5102APWR PCM5102A Texas Instruments | TSSOP-20_4.4x6.5mm_P0.65mm | U9 |
| 1 | TPA6130A2RTJR TPA6130A2RTJ Texas Instruments | WQFN-20-1EP_4x4mm_P0.5mm_EP2.7x2.7mm | U10 |
| 1 | TPS61175PWPR TPS61175PWP Texas Instruments | Texas_HTSSOP-14-1EP_4.4x5mm_P0.65mm_EP3.4x5mm_Mask3.155x3.255mm | U11 |
| 1 | TPS7A4701RGWR TPS7A4701RGW Texas Instruments | Texas_RGW0020A_VQFN-20-1EP_5x5mm_P0.65mm_EP3.15x3.15mm | U12 |
| 1 | BQ24074RGTR BQ24074RGT Texas Instruments | VQFN-16-1EP_3x3mm_P0.5mm_EP1.68x1.68mm | U13 |
| 2 | 2N7002,215 2N7002 Nexperia | SOT-23 | Q1, Q2 |
| 2 | AO3401A Alpha & Omega | SOT-23 | Q3, Q4 |
| 1 | PJ-102AH 9V DC IN CUI Devices | BarrelJack_CUI_PJ-102AH_Horizontal | J1 |
| 1 | RJHSE-5380 AMBISONIC MIC RJ45 Amphenol ICC | RJ45_Amphenol_RJHSE5380 | J2 |
| 1 | PPTC141LFBN-RC MSP3526 TFT 3.5IN 14PIN SOCKET Sullins Connector Solutions | PinSocket_1x14_P2.54mm_Vertical | J3 |
| 1 | NRJ6HF 1/4in BINAURAL LINE OUT Neutrik | Jack_6.35mm_Neutrik_NRJ6HF_Horizontal | J4 |
| 1 | SJ1-3533NG 1/8in BINAURAL HEADPHONE OUT CUI Devices | Jack_3.5mm_CUI_SJ1-3533NG_Horizontal | J5 |
| 1 | DS1021-2x13SF11-B ANALOG TEST HEADER 2x13 CONNFLY | PinHeader_2x13_P2.54mm_Vertical | J6 |
Show 74 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | DS1021-2x13SF11-B DIGITAL TEST HEADER 2x13 CONNFLY | PinHeader_2x13_P2.54mm_Vertical | J7 |
| 1 | TYPE-C-31-M-12 USB-C POWER + DATA HRO | USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J9 |
| 1 | B2B-PH-K-S BATTERY 1S LiPo JST | JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J10 |
| 1 | 1206L075/13.2WR 750mA PTC Littelfuse | Fuse_1206_3216Metric | F1 |
| 1 | 1206L200/12WR 2A PTC Littelfuse | Fuse_1206_3216Metric | F2 |
| 1 | G6K-2F-Y DC5 G6K-2F-Y 5VDC Omron | Relay_DPDT_Omron_G6K-2F-Y | K1 |
| 1 | B3F-5150 RECORD START/STOP Omron | SW_PUSH-12mm | SW2 |
| 1 | EC11E15244G1 MASTER GAIN Alps Alpine | RotaryEncoder_Alps_EC11E-Switch_Vertical_H20mm | SW3 |
| 1 | RKJXT1F42001 TFT MENU NAV Alps Alpine | SW_Nav5_ALPS_RKJXT1F42001 | SW4 |
| 4 | B340A-13-F B340A 40V 3A Diodes Incorporated | D_SMA | D1, D10, D12, D14 |
| 1 | SMBJ12A Littelfuse | D_SMB | D2 |
| 1 | SS14-13-F SS14 Diodes Incorporated | D_SMA | D3 |
| 1 | LTST-C190TBKT POWER BLUE Lite-On | LED_0603_1608Metric | D4 |
| 1 | LTST-C190KRKT RECORD RED Lite-On | LED_0603_1608Metric | D5 |
| 4 | PESD12VL1BA,115 PESD12VL1BA Nexperia | D_SOD-323 | D6, D7, D8, D9 |
| 1 | USBLC6-2SC6 STMicroelectronics | SOT-23-6 | D11 |
| 6 | 1N4148W-7-F 1N4148W Diodes Incorporated | D_SOD-123 | D13, D15, D16, D17, D18, D19 |
| 1 | ASPIAIG-F4020-2R2M-T 2.2uH 1.5A Abracon | L_Abracon_ASPIAIG-F4020 | L1 |
| 1 | SRN6045TA-100M 10uH 2A Bourns | L_Bourns_SRN6045TA | L2 |
| 1 | EEE-FT1E101AP 100uF 25V Panasonic | CP_Elec_6.3x5.8 | C1 |
| 1 | GRM21BR71H104KA01L 100nF 25V Murata | C_0805_2012Metric | C2 |
| 4 | CL31B106KAHNNNE 10uF 25V Samsung | C_1206_3216Metric | C3, C76, C77, C85 |
| 5 | GCM1885C2A220JA16D 22pF C0G Murata | C_0603_1608Metric | C4, C21, C22, C23, C24 |
| 2 | EMK316BB7226ML-T 22uF 10V Taiyo Yuden | C_1206_3216Metric | C5, C6 |
| 2 | GRM21BR71H105KA12L 1uF 10V Murata | C_0805_2012Metric | C7, C9 |
| 1 | GRM21BZ71E475KE15L 4.7uF 10V Murata | C_0805_2012Metric | C8 |
| 1 | GRM31CR61A476ME15L 47uF 10V Murata | C_1206_3216Metric | C10 |
| 23 | GRM188R71H104KA93D 100nF Murata | C_0603_1608Metric | C11, C33, C34, C35, C36, C40, C41, C43 +15 |
| 1 | CC0805KRX7RCBB102 1nF 1kV C0G Yageo | C_0805_2012Metric | C12 |
| 4 | GRM1885C1H101JA01D 100pF C0G Murata | C_0603_1608Metric | C13, C14, C15, C16 |
| 8 | GRM31CR71H475KA12L 4.7uF 16V Murata | C_1206_3216Metric | C17, C18, C19, C20, C25, C26, C27, C28 |
| 4 | GRM1885C1H103JA01D 10nF C0G Murata | C_0603_1608Metric | C29, C30, C31, C32 |
| 3 | CL31B106KAHNNNE 10uF 16V Samsung | C_1206_3216Metric | C37, C74, C88 |
| 3 | GRM21BR71H105KA12L 1uF Murata | C_0805_2012Metric | C38, C39, C53 |
| 5 | CL31B106KAHNNNE 10uF Samsung | C_1206_3216Metric | C42, C45, C46, C55, C62 |
| 4 | GRM188R71H103KA01D 10nF Murata | C_0603_1608Metric | C48, C49, C93, C94 |
| 2 | GRM21BR71E225KE11L 2.2uF Murata | C_0805_2012Metric | C51, C52 |
| 4 | GRM21BR71E225KE11L 2.2uF X7R Murata | C_0805_2012Metric | C57, C58, C86, C87 |
| 4 | GRM188R71E105KA12D 1uF Murata | C_0603_1608Metric | C59, C60, C61, C65 |
| 1 | EEE-FK1C101P 100uF 16V Panasonic | CP_Elec_6.3x5.8 | C66 |
| 2 | GRM1885C1H222JA01D 2.2nF C0G Murata | C_0603_1608Metric | C67, C68 |
| 1 | CC0603KRX7R9BB473 47nF Yageo | C_0603_1608Metric | C79 |
| 1 | GRM1885C1H472JA01D 4.7nF C0G Murata | C_0603_1608Metric | C80 |
| 1 | GCM1885C2A470JA16D 47pF C0G Murata | C_0603_1608Metric | C81 |
| 1 | GRM188R71E105KA12D 1uF 16V Murata | C_0603_1608Metric | C83 |
| 3 | CL21B106KAYQNNE 10uF 10V Samsung | C_0805_2012Metric | C90, C91, C92 |
| 1 | RC0603FR-07680KL 680k Yageo | R_0603_1608Metric | R1 |
| 1 | RC0603FR-07130KL 130k Yageo | R_0603_1608Metric | R2 |
| 11 | RC0603FR-07100KL 100k Yageo | R_0603_1608Metric | R3, R38, R39, R40, R41, R43, R64, R77 +3 |
| 10 | RC0603FR-071ML 1M Yageo | R_0603_1608Metric | R4, R14, R15, R16, R17, R86, R87, R88 +2 |
| 1 | RC0603FR-070RL 0R CHASSIS LINK Yageo | R_0603_1608Metric | R5 |
| 4 | RC0603FR-074K7L 4.7k ELECTRET BIAS Yageo | R_0603_1608Metric | R6, R7, R8, R9 |
| 4 | RC0603FR-07100RL 100R RF Yageo | R_0603_1608Metric | R10, R11, R12, R13 |
| 4 | RT0603BRD0768KL 68k 0.1% Yageo | R_0603_1608Metric | R18, R20, R22, R24 |
| 4 | RT0603BRD0733KL 33k 0.1% Yageo | R_0603_1608Metric | R19, R21, R23, R25 |
| 4 | RT0603BRD0710KL 10k 0.1% Yageo | R_0603_1608Metric | R26, R27, R28, R29 |
| 4 | RT0603BRD0790K9L 90.9k 0.1% Yageo | R_0603_1608Metric | R30, R31, R32, R33 |
| 7 | RC0603FR-07100RL 100R Yageo | R_0603_1608Metric | R34, R35, R36, R37, R42, R61, R84 |
| 2 | RC0603FR-074K7L 4.7k Yageo | R_0603_1608Metric | R44, R45 |
| 8 | RC0603FR-0733RL 33R Yageo | R_0603_1608Metric | R46, R47, R48, R49, R57, R58, R59, R69 |
| 15 | RC0603FR-0710KL 10k Yageo | R_0603_1608Metric | R50, R51, R52, R53, R60, R70, R71, R72 +7 |
| 1 | RC0603FR-072K2L 2.2k Yageo | R_0603_1608Metric | R54 |
| 2 | RC0603FR-071KL 1k Yageo | R_0603_1608Metric | R55, R68 |
| 1 | RC0805FR-07100RL 100R TFT BACKLIGHT Yageo | R_0805_2012Metric | R56 |
| 2 | RC0603FR-13470RL 470R Yageo | R_0603_1608Metric | R62, R63 |
| 2 | RC0603FR-0710RL 10R Yageo | R_0603_1608Metric | R65, R66 |
| 1 | RC0603FR-07100RL 100R MIC BIAS FILTER Yageo | R_0603_1608Metric | R67 |
| 2 | RC0603FR-075K1L 5.1k Yageo | R_0603_1608Metric | R75, R76 |
| 1 | RC0603FR-0747KL 47k Yageo | R_0603_1608Metric | R78 |
| 1 | RC0603FR-0775KL 75k Yageo | R_0603_1608Metric | R80 |
| 1 | RC0603FR-0780K6L 80.6k Yageo | R_0603_1608Metric | R82 |
| 1 | RC0603FR-071K1L 1.1k ILIM Yageo | R_0603_1608Metric | R91 |
| 1 | RC0603FR-071K2L 1.2k ISET Yageo | R_0603_1608Metric | R92 |
| 1 | RC0603FR-0710KL 10k TS Yageo | R_0603_1608Metric | R93 |
Quad Preamp and 4-Channel Ambisonic Recorder design files
The KiCad project lives in the jdg511/quadpreandrecorder repository on GitHub; these links point at the commit this page was built from.
Quad Preamp and 4-Channel Ambisonic Recorder: common questions
What microcontroller does the Quad Preamp and 4-Channel Ambisonic Recorder use?
The Quad Preamp and 4-Channel Ambisonic Recorder is built around the TEENSY41, from the NXP family.
How big is the Quad Preamp and 4-Channel Ambisonic Recorder PCB?
The Quad Preamp and 4-Channel Ambisonic Recorder measures 138 × 114 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Quad Preamp and 4-Channel Ambisonic Recorder?
242 components, from 94 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 Quad Preamp and 4-Channel Ambisonic Recorder design files?
From the jdg511/quadpreandrecorder repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Quad Preamp and 4-Channel Ambisonic Recorder design in my own project?
The repository has no license, so all rights stay with jdg511. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Quad Preamp and 4-Channel Ambisonic Recorder without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug NXP firmware against it before you order a PCB.
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