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STD TWS Tester

License: MIT License

Mode: Editors' pick

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Update time: 2024-06-04 22:58:11
Creation time: 2024-05-29 23:22:29
Description

This is a board for connecting a microphone to measure the playback frequency characteristics of TWS earphones.

It is configured as a left-right pair, so it can also be used for binaural recording.

The constants are determined so that the frequency characteristics of the circuit are as flat as possible,

and the microphone is designed to use SPL (Hong Kong) Limited's XCM6035-2022-354PR, which has a diameter of 6 mm and good frequency characteristics that can be inserted into TWS earpieces.

Design Drawing
schematic diagram
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PCB
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ID Name Designator Footprint Quantity Supplier JLCPCB Part Class Contributor
1 100nF C1,C4,C10,C20 C0603 4 LCSC C14663 CC0603KRX7R9BB104
2 10uF C2,C5,C11,C13,C21,C23 C0603 6 LCSC C19702 CL10A106KP8NNNC
3 1uF C3 C0603 1 LCSC C15849 CL10A105KB8NNNC
4 220nF C12,C22 C0603 2 LCSC C1882480 CS0603KRX7R9BB224
5 100pF C14,C24 C0603 2 LCSC C14858 CL10C101JB8NNNC
6 100uF C15,C25 C1206 2 LCSC C2844390 C1206X5R107K6R3NT
7 KH-PJ-320D-SMT CN1 AUDIO-SMD_KH-PJ-320D-SMT 1 LCSC C5123147 KH-PJ-320D-SMT
8 Blue light 0603 LED1 LED0603-RD 1 LCSC C2288 Blue light 0603
9 HDR-M-2.54_1x2 MIC_L,MIC_R,OUT_L,OUT_R,VIN1 HDR-M-2.54_1X2 5 LCSC C124375 HDR-M-2.54_1x2
10 5.1kΩ R1,R2 R0603 2 LCSC C23186 0603WAF5101T5E
11 1kΩ R3,R10,R11,R14,R20,R21,R24 R0603 7 LCSC C21190 0603WAF1001T5E
12 100kΩ R12,R13,R22,R23 R0603 4 LCSC C25803 0603WAF1003T5E
13 15kΩ R15,R25 R0603 2 LCSC C22809 0603WAF1502T5E
14 1MΩ R16,R26 R0603 2 LCSC C22935 0603WAF1004T5E
15 LM358DR2G U1 SOIC-8_L5.0-W4.0-P1.27-LS6.0-BL 1 LCSC C7950 LM358DR2G
16 AMS1117-3.3 U2 SOT-223-3_L6.5-W3.4-P2.30-LS7.0-BR 1 LCSC C6186 AMS1117-3.3 1476261164
17 KH-TYPE-C-6P_C2926725 USB1 TYPE-C-SMD_TYPE-C-31-M-16 1 LCSC C2926725 KH-TYPE-C-6P_C2926725

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