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STD TWS Tester
License: MIT License
Mode: Editors' pick
- 0
Update time：
2024-07-07 06:57:29
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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| ID | Name | Designator | Footprint | Quantity | Supplier | |
|---|---|---|---|---|---|---|
| 1 | 100nF | C1,C4 | C0603 | 2 | LCSC | C14663 |
| 2 | 10uF | C2,C5,C13,C23 | C0603 | 4 | LCSC | C19702 |
| 3 | 1uF | C3 | C0603 | 1 | LCSC | C15849 |
| 4 | DNP | C10,C11,C20,C21 | C0603 | 4 | LCSC | C14663 |
| 5 | 220nF | C12,C22 | C0603 | 2 | LCSC | C1882480 |
| 6 | 100pF | C14,C24 | C0603 | 2 | LCSC | C14858 |
| 7 | 100uF | C15,C25 | C1206 | 2 | LCSC | C2844390 |
| 8 | KH-PJ-320D-SMT | CN1 | AUDIO-SMD_KH-PJ-320D-SMT | 1 | LCSC | C5123147 |
| 9 | Blue light 0603 | LED1 | LED0603-RD | 1 | LCSC | C2288 |
| 10 | HDR-M-2.54_1x2 | MIC_L,MIC_R,OUT_L,OUT_R,VIN1 | HDR-M-2.54_1X2 | 5 | LCSC | C124375 |
| 11 | 5.1kΩ | R1,R2 | R0603 | 2 | LCSC | C23186 |
| 12 | 1kΩ | R3,R10,R11,R14,R20,R21,R24 | R0603 | 7 | LCSC | C21190 |
| 13 | 100kΩ | R12,R13,R22,R23 | R0603 | 4 | LCSC | C25803 |
| 14 | 15kΩ | R15,R25 | R0603 | 2 | LCSC | C22809 |
| 15 | 1MΩ | R16,R26 | R0603 | 2 | LCSC | C22935 |
| 16 | LM358DR2G | U1 | SOIC-8_L5.0-W4.0-P1.27-LS6.0-BL | 1 | LCSC | C7950 |
| 17 | AMS1117-3.3 | U2 | SOT-223-3_L6.5-W3.4-P2.30-LS7.0-BR | 1 | LCSC | C6186 |
| 18 | KH-TYPE-C-6P_C2926725 | USB1 | TYPE-C-SMD_TYPE-C-31-M-16 | 1 | LCSC | C2926725 |
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