4 layers140 × 74.2 mm MyAudio Pre, the printed circuit board in 3D

MyAudio Pre

An open-source microphone preamplifier aimed at adapting OGJ's ThatMic Preamp to USB power and SMT components

Size: 140 × 74.2 mm
Copper layers: 4
Thickness: 1.6 mm
Parts: 226
Nets: 140
Pads: 612
Tracks, vias: 311, 25
Pours: 4
Routed: Yes
KiCad: KiCad 8.0 (file 20240108)
Created: 29 Nov 2024
Updated: 27 Jan 2025

Overview

MyAudio Pre is an open-source printed circuit board by PatrickCassino2, from the PatrickCassino2/MyAudioStack-Preamp repository on GitHub, published under the CC0-1.0 licence. It is a 4-layer board of 140 × 74.2 mm with 226 parts on 140 nets, routed with 311 tracks and 25 vias.

It is built around the 1N4148W, ACGRTS4004-HF and NC3FBH2, with the RB168L-60TFTE25 and TR-0603HV1-R among its other parts. Its parts include 88 resistors, 57 capacitors, 32 diodes, 14 connectors and 10 transistors. It belongs with the audio and music boards of this library.

Main components

README

README.md

MyAudioStack Preamp

An open-source microphone preamplifier aimed at adapting OGJ's ThatMic Preamp to use USB power and SMT components.

Category and platform

Audio and music

Project files

Show this board on your page

https://pcbkit.io/boards/PatrickCassino2/MyAudioStack-Preamp

The board's own page, for a message or a post.

Source

Repository: PatrickCassino2/MyAudioStack-Preamp
Board file: KiCad Design Files/MyAudio-Pre.kicad_pcb
Commit: 3f4d421
Licence: CC0-1.0

Parts

226

Qty	Value	Footprint	References
14	1N4148W	Diode_SMD:D_SOD-123	D102, D103, D104, D107, D108, D111, D113, D400, D401, D402, D403, D405, D412, D413
8	ACGRTS4004	Diode_SMD:D_SOD-123F	D105, D106, D109, D110, D408, D409, D410, D411
6	18V	Diode_SMD:D_SOD-123	D112, D114, D115, D406, D407, D414
6	47k	Resistor_SMD:R_MELF_MMB-0207	R130, R140, R141, R408, R427, R428
5	220u-63V	Capacitor_THT:CP_Radial_D10.0mm_P5.00mm	C116, C118, C119, C126, C131
5	4-pin_0deg_header	Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical	J101, J106, J107, J109, J402
5	SW_DPDT_x2	footprint:PBH2UEESNPNAGX_EWI	SW100, SW101, SW102, SW400, SW404
4	0.1u	Capacitor_SMD:C_0402_1005Metric	C101, C102, C423, C424
4	0.1u	Capacitor_SMD:C_1210_3225Metric	C109, C110, C418, C419
4	0.1u	Capacitor_SMD:C_1206_3216Metric	C115, C127, C400, C405
4	1.2k-0.1%	Resistor_SMD:R_1206_3216Metric	R136, R137, R424, R425
4	10-1W	Resistor_SMD:R_1206_3216Metric	R133, R135, R409, R410
4	100	footprint:RESM6438X317N	R134, R138, R423, R426
4	10M	Resistor_SMD:R_1206_3216Metric	R108, R109, R431, R432
4	10k	Resistor_SMD:R_MiniMELF_MMA-0204	R119, R139, R402, R405
4	10k	Resistor_SMD:R_0805_2012Metric	R101, R110, R434, R440
4	10n	Capacitor_THT:C_Rect_L7.2mm_W3.0mm_P5.00mm_FKS2_FKP2_MKS2_MKP2	C129, C130, C415, C416
4	1uF	Capacitor_SMD:C_1206_3216Metric	C103, C104, C425, C426
4	22k	Resistor_SMD:R_MiniMELF_MMA-0204	R125, R126, R403, R404
4	22u-50V	Capacitor_THT:CP_Radial_D8.0mm_P3.50mm	C121, C125, C413, C414
4	470p	Capacitor_SMD:C_0805_2012Metric	C123, C124, C409, C410
4	5.1k	Capacitor_SMD:C_0402_1005Metric	R105, R106, R435, R436
4	6.8k-0.1%-0.5W	Resistor_SMD:R_1206_3216Metric	R128, R129, R406, R407
4	BC848C-7-F	Package_TO_SOT_SMD:SOT-23	Q103, Q104, Q400, Q401
4	BLM21AG601SH1D	Inductor_SMD:L_0805_2012Metric	FB100, FB101, FB400, FB401
4	M3	MountingHole:MountingHole_3.2mm_M3_Pad	MH100, MH101, MH102, MH103
4	NC3FBH2	Connector_Audio:Jack_XLR_Neutrik_NC3FBH2_Horizontal	J100, J103, J406, J407
2	.01u	Capacitor_SMD:C_0805_2012Metric	C106, C428
2	.1uF	Capacitor_SMD:C_1206_3216Metric	C105, C427
2	1	Resistor_SMD:R_0603_1608Metric	R103, R443
2	100	Resistor_SMD:R_0805_2012Metric	R107, R438
2	100k	Resistor_SMD:R_0402_1005Metric	R102, R442
2	10p	Capacitor_SMD:C_0402_1005Metric	C114, C432
2	10u	Capacitor_SMD:C_1206_3216Metric	C100, C422
2	12.4	Resistor_SMD:R_0805_2012Metric	R124, R419
2	127	Resistor_SMD:R_0805_2012Metric	R120, R415
2	150p	Capacitor_SMD:C_0402_1005Metric	C113, C434
2	18u	Inductor_SMD:L_7.3x7.3_H4.5	L100, L400
2	1M	Resistor_SMD:R_0402_1005Metric	R104, R444
2	1n	Capacitor_SMD:C_0402_1005Metric	C111, C431
2	2.2u	Capacitor_SMD:C_0402_1005Metric	C107, C429
2	21.3k	Resistor_SMD:R_0402_1005Metric	R114, R448
2	22	Resistor_SMD:R_0805_2012Metric	R123, R418
2	22k	Resistor_SMD:R_1206_3216Metric	R143, R430
2	22n	Capacitor_SMD:C_0402_1005Metric	C112, C433
2	237	Resistor_SMD:R_0805_2012Metric	R118, R414
2	3.9	Resistor_SMD:R_0603_1608Metric	R131, R421
2	39	Resistor_SMD:R_0805_2012Metric	R122, R417
2	4-pin_90deg_socket	Connector_PinSocket_2.54mm:PinSocket_1x04_P2.54mm_Horizontal	J105, J108
2	4.7k	Resistor_SMD:R_MELF_MMB-0207	R142, R429
2	4.99	Resistor_SMD:R_0805_2012Metric	R132, R422
2	40.2k	Resistor_SMD:R_0402_1005Metric	R112, R446
2	42.2k	Resistor_SMD:R_0402_1005Metric	R111, R445
2	453	Resistor_SMD:R_0805_2012Metric	R117, R413
2	47p	Capacitor_SMD:C_0402_1005Metric	C128, C411
2	47u-63V-BP	Capacitor_THT:C_Radial_D10.0mm_H16.0mm_P5.00mm	C120, C122
2	5	Resistor_SMD:R_0402_1005Metric	R100, R441
2	560p	Capacitor_SMD:C_0402_1005Metric	C108, C430
2	6.81	Resistor_SMD:R_0805_2012Metric	R127, R420
2	60m	Resistor_SMD:R_0603_1608Metric	R113, R447
2	71.5	Resistor_SMD:R_0805_2012Metric	R121, R416
2	8.06k	Resistor_SMD:R_0805_2012Metric	R115, R411
2	909	Resistor_SMD:R_0805_2012Metric	R116, R412
2	AudioJack4	Connector_Audio:Jack_3.5mm_KoreanHropartsElec_PJ-320D-4A_Horizontal	J104, J408
2	BSC0910NDI_Q1	footprint:PG-TSDSON-8-1&slash_2_INF	Q100, Q404
2	LED_Dual_AKA	LED_THT:LED_D5.0mm-3	D101, D404
2	LT8357	Package_SO:MSOP-12-1EP_3x4mm_P0.65mm_EP1.65x2.85mm_ThermalVias	U100, U401
2	NMOS	Package_TO_SOT_SMD:SOT-23-3	Q102, Q403
2	PMOS	Package_TO_SOT_SMD:SOT-23-3	Q101, Q402
2	RB168L-60TFTE25	footprint:DIOM5026X220N	D100, D415
2	THAT1512	Package_SO:SOIC-8_3.9x4.9mm_P1.27mm	U101, U400
2	TR-0603HV1-R	Capacitor_SMD:C_0603_1608Metric	F100, F400
1	220u-63V	Capacitor_THT:CP_Radial_D8.0mm_P3.50mm	C132
1	6800u-6.3V	Capacitor_THT:CP_Radial_D12.5mm_P5.00mm	C117
1	Logo_Open_Hardware_Small	Symbol:Symbol_CC-Attribution_CopperTop_Small	LOGO101
1	Logo_Open_Hardware_Small	Symbol:Symbol_CreativeCommons_CopperTop_Type2_Small	LOGO100
1	Logo_Open_Hardware_Small	Symbol:OSHW-Symbol_6.7x6mm_Copper	LOGO102
1	SW_Rotary12	footprint:LORINCK1049	SW103
1	USB_C_Receptacle_PowerOnly_24P	Connector_USB:USB_C_Receptacle_G-Switch_GT-USB-7010ASV	J102

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Questions

How big is the MyAudio Pre PCB?

It measures 140 × 74.2 mm and has 4 copper layers, 1.6 mm thick.

What parts does the MyAudio Pre use?

226 parts, built around the 1N4148W, ACGRTS4004-HF, NC3FBH2 and RB168L-60TFTE25. 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 MyAudio Pre KiCad files?

From the PatrickCassino2/MyAudioStack-Preamp repository on GitHub, at the commit this page was made from: the board is KiCad Design Files/MyAudio-Pre.kicad_pcb and its schematic KiCad Design Files/MyAudio-Pre.kicad_sch. PCBKit opens the board in the browser, with nothing to install.

Can I use the MyAudio Pre design in my own project?

Its repository publishes it under the CC0-1.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).