ECM XLR microphone

AXinsLab·ECM_XLR_microphone·PCB/Kicad_project/OPA_Alice_ECM_Microphone.kicad_pcb

ECM XLR microphone PCB layout, top view — open source board by AXinsLab

Simulate this board

About the ECM XLR microphone PCB

ECM XLR microphone is an open source PCB design by AXinsLab, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 38.8 × 75 mm, with 30 components from 16 distinct parts.

Other key parts include the OPA1642AIDR. By type, the board carries 12 resistors, 9 capacitors, 5 connectors, 1 IC, 1 microphone and 1 diode.

It belongs with the audio designs in this gallery.

From the project

A ECM Microphone use OPA1642AID JFET amplifier. DIY 3D printer case that original design.

简介：使用下水道过滤网设计的DIY全屏蔽麦克风，优点是壳体便宜，益于购买，DIY乐趣颇多，缺点是屏蔽性可能存在不足，3D打印的部分零件需要增加铝膜屏蔽层，略显复杂。电路部分基于Alice OPA 驻极体麦克风电路设计，具有极低的底噪及失真率。

版权说明：本项目允许用户查看、使用、修改源代码。禁止将项目或其衍生作品用于商业目的（例如：销售、作为商业服务的一部分盈利）。用户在使用或分发（包括修改版）时，必须保留原始版权和许可声明（注明出处）

- Roadmap - 文件目录说明 - 零件选型 1. 音头 2. 屏蔽网 3. 运算放大器 4. 1G电阻 5. 卡侬接头 6. 螺丝螺母 7. 其它 - PCB焊接 - 作者 - 版权说明

待增加功能： 1. 增加75Hz低切开关 2. 增加-10dB衰减开关，提升麦克风可录制的最大升压 3. 增加7kHz以后3dB shelf调音电路

From the project README

Main components on the ECM XLR microphone

ECM XLR microphone bill of materials (BOM)

30 components, 16 distinct parts.

Qty	Part	Footprint	Refs
1	OPA1642AIDR	SOIC-8_3.9x4.9mm_P1.27mm	U1
4	Conn_01x01_Pin	F5-9-0.4直筒内绕平行针_触摸弹簧	J1, J2, J3, J4
1	XLR	Molex_PicoBlade_53398-0371_1x03-1MP_P1.25mm_Vertical	J5
1	ECM	Molex_PicoBlade_53398-0271_1x02-1MP_P1.25mm_Vertical	MK1
1	TL431DBZ	SOT-23	TL431
1	12V	D_SMA	D1
2	0.1uF	C_0603_1608Metric_Pad1.08x0.95mm_HandSolder	C1, C7
5	47uF	CP_Elec_8x10.5	C2, C3, C4, C5, C6
2	22nF	C_1206_3216Metric_Pad1.33x1.80mm_HandSolder	C8, C9
1	1G	R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_Horizontal	R1
2	47k	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R2, R3
4	2.2k	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R4, R6, R9, R10
1	200	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R5
1	38k	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R7
1	10k	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R8
2	47	R_0603_1608Metric_Pad0.98x0.95mm_HandSolder	R11, R12

ECM XLR microphone design files

The KiCad project lives in the AXinsLab/ECM_XLR_microphone repository on GitHub; these links point at the commit this page was built from.

ECM XLR microphone: common questions

How big is the ECM XLR microphone PCB?

The ECM XLR microphone measures 38.8 × 75 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the ECM XLR microphone?

30 components, from 16 distinct parts. The full bill of materials is listed on this page.

Where can I download the ECM XLR microphone design files?

From the AXinsLab/ECM_XLR_microphone repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the ECM XLR microphone design in my own project?

Yes, under the terms of its GPL-3.0 license, which AXinsLab chose for the repository.

Similar boards