2 layers30 × 25 mm
Vcc distributor
lufixSch/sound-laser
Bachelor Thesis at the FH-Joanneum about building a speaker creating a sound beam
11 parts5
4 layers55.4 × 64 mm
Speaker
lufixSch/sound-laser5Bachelor Thesis at the FH-Joanneum about building a speaker creating a sound beam
- Size
- 55.4 × 64 mm
- Copper layers
- 4
- Thickness
- 4.69 mm
- Parts
- 64
- Nets
- 18
- Pads
- 149
- Tracks, vias
- 187, 53
- Pours
- 12
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 4 Mar 2022
- Updated
- 9 Sep 2022
Overview
Speaker is an open-source printed circuit board by lufixSch, from the lufixSch/sound-laser repository on GitHub. It is a 4-layer board of 55.4 × 64 mm with 64 parts on 18 nets, routed with 187 tracks and 53 vias.
It is built around the ADA4622-1BRZ, LM2735XMF and BC847, with the BC857 and SSB44 among its other parts. Its parts include 15 capacitors, 9 resistors, 7 connectors, 2 ICs and 2 transistors. It belongs with the audio and music boards of this library.
Main components
5
ADA4622-1BRZ
SOIC-8-15V~15V -40℃~+125℃ 1 100dB 10pA 12.5nV/√Hz@1kHz 1uV/℃ 20mA 23V/us 2pA 350uV 5V~30V 715uA 8MHz Rail-to-rail output Short-Circuit Protection、EMI filtering/RF suppression、Enable/shutdown function SOIC-8 FET Input Amplifiers ROHSAnalog DevicesFET Input Amplifiers
LM2735XMF
SOT-23-5-40℃~+125℃@(TJ) 1 1.6MHz 2.1A 2.7V~5.5V 3V~24V 7nA Boost Boost、SEPIC、Flyback Built-in No SOT-23-5 DC-DC Converters ROHSTexas InstrumentsDC-DC Converters
BC847
SOT-231 NPN 100MHz 100mA 100nA 110 200mW 45V 500mV 6V NPN SOT-23 Bipolar (BJT) ROHSShikuesBipolar (BJT)BC857
SOT-231 PNP 100MHz 100mA 15nA 200mW 45V 5V 650mV 800 PNP SOT-23 Bipolar (BJT) ROHSSTMicroelectronicsBipolar (BJT)
SSB44
DO-214AA(SMB)-55℃~+150℃ 1 Independent 100A 200uA@40V 40V 460mV@4A 4A DO-214AA(SMB) Schottky Diodes ROHSTaiwan SemiconductorSchottky Diodes
README
README.mdSound Laser
This repository contains the source code, 3D Models, Circuit/PCB designs and documentation of the Sound Laser bachelor thesis at the FH JOANNEUM.
The LaTex documentation is located in docs/build/SoundLaser_Thesis.pdf
Abstract
Parametric speakers are able to transmit audible sound with a beamforming effect using ultrasonic transducers. This work will describe the development of such a speaker as well as the software necessary to operate it.
In order to build this speaker it is explained how the beamforming effect occurs and how the number of transducers as well as distance between them influences its behaviour. Furthermore non-linear acoustics and why they can demodulate amplitude or frequency modulated signals are discussed.
Parts
64| Qty | Value | Footprint | References |
|---|---|---|---|
| 19 | Ultrasonic_Transducer | custom_footprints:CUSP-T80-15-2400-TH | M1, M2, M3, M4, M5, M6, M10, M11, M12, M13, M14, M15, M16, M17, M18, M19 +3 |
| 6 | Conn_01x03 | custom_footprints:SPI_Conn_SMD | J1, J2, J3, J4, J5, J6 |
| 5 | 100k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R7, R8, R9, R10, R11 |
| 4 | 100nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C4, C6, C11, C15 |
| 4 | 10uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C2, C3, C5, C14 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_2.2mm_M2_DIN965_Pad_TopBottom | H1, H2, H3, H4 |
| 3 | TestPoint | TestPoint:TestPoint_Keystone_5000-5004_Miniature | TP1, TP2, TP3 |
| 2 | 1nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C12, C13 |
| 1 | 1.5nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C8 |
| 1 | 10k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R2 |
| 1 | 10nF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C9 |
| 1 | 10uH | Inductor_SMD:L_Wuerth_5030_Handsolder | L1 |
| 1 | 15k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3 |
| 1 | 180k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 1uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C10 |
| 1 | 22uF | Capacitor_SMD:C_1206_3216Metric_Pad1.33x1.80mm_HandSolder | C1 |
| 1 | 470pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C7 |
| 1 | 5k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R4 |
| 1 | ADA4622-1 | Package_TO_SOT_SMD:SOT-23-5_HandSoldering | OP1 |
| 1 | BC847 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | BC857 | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical_SMD_Pin1Left | J7 |
| 1 | LM2735XMF | Package_TO_SOT_SMD:SOT-23-5_HandSoldering | U2 |
| 1 | LTC2640-Z | Package_TO_SOT_SMD:SOT-23-8_Handsoldering | U1 |
| 1 | SSB44 | Diode_SMD:D_SMB_Handsoldering | D1 |
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Questions
How big is the Speaker PCB?
It measures 55.4 × 64 mm and has 4 copper layers, 4.69 mm thick.
What parts does the Speaker use?
64 parts, built around the ADA4622-1BRZ, LM2735XMF, BC847 and BC857. 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 Speaker KiCad files?
From the lufixSch/sound-laser repository on GitHub, at the commit this page was made from: the board is hardware/pcb/speaker/speaker.kicad_pcb and its schematic hardware/pcb/speaker/power_supply_1A.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Speaker design in my own project?
Its repository states no licence, so its author keeps all rights: ask lufixSch before reusing the design.