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solderneer
A novel approach to enhancing silent speech recognition systems with a multiplexed star electrode array, developed for my final year dissertation at University College London (UCL). Includes datasets, code, and electronics CAD files.
| Reference | Value | Description |
|---|---|---|
| IC1 | TPS72325DBVRG4 | 200mA Fixed 2.5V Negative 10V SOT-23-5 Linear Voltage Regulators (LDO) ROHS |
| IC2 | TLV73325PQDBVRQ1 | 300mA null 2.5V positive 5.5V SOT-23-5 Linear Voltage Regulators (LDO) ROHS |
| Q1,Q2 | BC817 | 45V 300mW 40@500mA,1V 500mA NPN SOT-23(TO-236) Bipolar Transistors - BJT ROHS |
| U1 | MAX98357AETE+T | Tiny, Low-Cost, PCM Class D Amplifier with Class AB Performance |
| U2 | ADS1299IPAG/R | 8 Channel AFE 24 Bit 42 mW 64-TQFP (10x10) |
| U3,U5-U9,U13,U14 |
| 7V 14.5V 4 5.5V SOT(5x3) ESD Protection Devices ROHS |
| U4 | XC6210B332MR | SOT-23-5 Linear Voltage Regulators (LDO) ROHS |
|---|
| U10 | ESP32-S3-WROOM-1 | SMD,18x25.5mm WiFi Modules ROHS |
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| U11 | LIS3DH | X,Y,Z LGA-16(3x3) Attitude Sensor/Gyroscope ROHS |
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| U12 | LM2664M6 | Switched Capacitor Voltage Converter |
|---|
| C1,C7,C8,C10,C12,C15,C23,C36,C37,C42,C44,C45,C50-C54,C56,C57 | 1uF | 10V 1uF X5R ±20% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHS Copy,25V 1uF X7R ±10% 0603 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHS |
|---|
| C2,C4,C6,C11,C13,C25,C35,C47,C55 | 0.1uF | 10V 100nF 10% X5R 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHS |
|---|
| C3,C14,C16-C22,C24,C26-C34 | 1nF | 50V 1nF C0G ±1% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHS |
|---|
| C5,C38,C39,C41,C43,C46 | 10uF | 10V 10uF X5R ±20% 0603 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHS,6.3V 10uF X6S ±20% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHS |
|---|
| C9 | 100uF | Multilayer Ceramic Capacitors MLCC - SMD/SMT 100.0uF +/-20% 10V X5R 1206 |
|---|
| C40 | 220pF | 50V 220pF X7R ±10% 0402 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHS |
|---|
| C48,C49 | 2.2uF | 2.2 µF ±10% 10V Ceramic Capacitor X7R 0402 (1005 Metric) |
|---|
| D1 | WS2812B | RGB SMD5050 Light Emitting Diodes (LED) ROHS |
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| J1 | DEBUG |
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| J2 | Speaker |
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| J3 | BATT CONN | 1x2P PH 1 Tin 2mm male 2 -25℃~+85℃ Copper Alloy 2A Surface Mount SMD,P=2mm Wire To Board / Wire To Wire Connector ROHS |
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| J4 | Power |
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| J5 | ELECTRODES |
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| J6 | BREAKOUT1 |
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| MK1 | SPH0645LM4H-B | 20 Hz ~ 10 kHz Digital, I²S Microphone MEMS (Silicon) 1.62 V ~ 3.6 V Omnidirectional (-26dB ±3dB @ 94dB SPL) Solder Pads |
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| R1 | 1M | 62.5mW Thick Film Resistors ±100ppm/℃ ±1% 1MΩ 0402 Chip Resistor - Surface Mount ROHS |
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| R2-R7,R10-R21,R36 | 2.2k | 62.5mW ±1% 2.2kΩ 0402 Chip Resistor - Surface Mount ROHS |
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| R8,R9,R22-R28,R32,R34,R35 | 10k | 62.5mW Thick Film Resistors ±100ppm/℃ ±1% 10kΩ 0402 Chip Resistor - Surface Mount ROHS |
|---|
| R29-R31,R37 | 51R | 62.5mW Thick Film Resistors ±1% 51Ω 0402 Chip Resistor - Surface Mount ROHS |
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| R33 | 680k | 100mW ±100ppm/℃ ±1% 680kΩ 0402 Chip Resistor - Surface Mount ROHS |
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