2 layers45 × 62 mm
2 layers81 × 73 mm
BalancedAudioBox
samo4/BalancedAudioBox1USB connected balanced +4dBu DAC. Also USB powered. Allegedly 192kHz/24bit.
- Size
- 81 × 73 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 65
- Nets
- 53
- Pads
- 223
- Tracks, vias
- 353, 91
- Pours
- 9
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 28 Jul 2019
- Updated
- 1 Aug 2024
Overview
BalancedAudioBox is an open-source printed circuit board by samo4, from the samo4/BalancedAudioBox repository on GitHub. It is a 2-layer board of 81 × 73 mm with 65 parts on 53 nets, routed with 353 tracks and 91 vias.
It is built around the DRV135UA/2K5G4, DPU01L-15 and LM27762DSS, with the PCM5102PW and TLV75533PDBV among its other parts. Its parts include 28 capacitors, 17 resistors, 7 connectors, 6 ICs and 1 inductor. It belongs with the audio and music boards of this library.
Main components
5
DRV135UA/2K5G4
SOIC-8SOIC-8 Buffers, Drivers, Receivers, Transceivers ROHSTexas InstrumentsPre-Ordered ChipsDPU01L-15
SIP-6SIP-6 Power Module/Power Supply ROHSMWPower Supply Module,Power Supplies
LM27762DSS
WSON-12-EP(2x3)-40℃~+85℃ -5V~-1.5V、1.5V~5V 2.5Ω 2.7V~5.5V 250mA 2MHz 390uA Inverted Support WSON-12-EP(2x3) Charge Pumps ROHSTexas InstrumentsCharge Pumps
PCM5102PW
TSSOP-20-25℃~+85℃ 1 3V~3.6V Digital filtering、Power-down mode I2S TSSOP-20 ADCs/DACs - Special Purpose ROHSTexas InstrumentsADCs/DACs - Special Purpose
TLV75533PDBV
SOT-23-5-40℃~+125℃@(Tj) 1 238mV@(500mA) 25uA 3.3V 46dB@(100kHz) 5.5V 500mA 71.5uVrms Fixed Over Current Protection、Thermal Shutdown、Input undervoltage protection Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdBalancedAudioBox
USB connected balanced +4dBu DAC. Also USB powered. And allegedly 384kHz/32bit.
Background
I have Genelec active speakers that only have balanced +4dBU input. I only use computer (orginally Intel NUC) as source and I wanted a DAC without any extra wires. There are many comercially availible DAC's, but the selection with balanced output is limited and I also wanted USB powered one without any extra features.
Status
The first prototype is working great, documentation is under construction.
How to make one
It's an electronics project, so you can use gerbers to make boards, buy components at your favourite distributor, buy USB to I2S board or chinese clone, 3D print the enclosure and assemble everything.
STEP files are included, and here's the link to Fusion.
Parts
65| Qty | Value | Footprint | References |
|---|---|---|---|
| 9 | 100n | Capacitor_SMD:C_0402_1005Metric | C9, C10, C13, C16, C17, C18, C25, C26, C28 |
| 7 | 10u/25V | Capacitor_SMD:C_0805_2012Metric | C1, C4, C5, C6, C19, C20, C27 |
| 6 | 4.7u | Capacitor_SMD:C_0603_1608Metric | C7, C8, C21, C22, C23, C24 |
| 4 | 1k | Resistor_SMD:R_0402_1005Metric | R9, R10, R11, R12 |
| 4 | 300R | Resistor_SMD:R_0603_1608Metric | R5, R6, R16, R17 |
| 2 | 1.58M | Resistor_SMD:R_0402_1005Metric | R1, R2 |
| 2 | 2.2n | Capacitor_SMD:C_0402_1005Metric | C14, C15 |
| 2 | 2.2u | Capacitor_SMD:C_0805_2012Metric | C11, C12 |
| 2 | 499k | Resistor_SMD:R_0402_1005Metric | R3, R4 |
| 2 | Conn_01x02 | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J2, J6 |
| 2 | Conn_01x03 | Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical | J5, J8 |
| 2 | DRV135UA_2K5 | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | IC2, IC3 |
| 2 | XLR3_Ground | BalancedAudioBox:XLR-NC3MA | J3, J4 |
| 1 | 1.5u | BalancedAudioBox:SRN30151R5Y | L1 |
| 1 | 100p | Capacitor_SMD:C_0603_1608Metric | C2 |
| 1 | 180k | Resistor_SMD:R_0402_1005Metric | R15 |
| 1 | 1u | Capacitor_SMD:C_0402_1005Metric | C3 |
| 1 | 2k2 | Resistor_SMD:R_0402_1005Metric | R7 |
| 1 | 3k3 | Resistor_SMD:R_0402_1005Metric | R8 |
| 1 | 47k | Resistor_SMD:R_0402_1005Metric | R13 |
| 1 | 634k | Resistor_SMD:R_0402_1005Metric | R14 |
| 1 | Conn_02x10_Odd_Even | BalancedAudioBox:XMOS_USB_Board_2x10_P2.54mm | J1 |
| 1 | DPU01L-15 | BalancedAudioBox:DPU01L15 | PS1 |
| 1 | De-emphasis | Jumper:SolderJumper-3_P1.3mm_Bridged12_Pad1.0x1.5mm | JP1 |
| 1 | LM27762 | Package_SON:WSON-12-1EP_3x2mm_P0.5mm_EP1x2.65_ThermalVias | U1 |
| 1 | Latency | Jumper:SolderJumper-3_P1.3mm_Bridged12_Pad1.0x1.5mm | JP2 |
| 1 | PCM5102 | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U2 |
| 1 | PLL operation | Jumper:SolderJumper-3_P1.3mm_Bridged12_Pad1.0x1.5mm | JP3 |
| 1 | Power source | Jumper:SolderJumper-3_P1.3mm_Bridged12_Pad1.0x1.5mm | JP4 |
| 1 | TLV75533PDBV | Package_TO_SOT_SMD:SOT-23-5 | U3 |
| 1 | TPS61252DSGT | BalancedAudioBox:SON50P200X200X80-9N | IC1 |
The 64 most common of 65 parts.
Similar boards
- 2 layers53 × 69 mm
- 4 layers101 × 47 mm
- 4 layers80 × 50 mm
Harp.device.lickety split
AllenNeuralDynamics/harp.device.lickety-split
0360: an ephys-compliant capacitive lick detector
193 parts5MIT - 4 layers80 × 100 mm
Harp treadmill
AllenNeuralDynamics/harp.device.treadmill-driver
0326: a Harp-compatible device for controlling an instrumented mouse treadmill
173 parts4 - 2 layers50.8 × 61 mm
Nui
alvarop/nui
Nui is an IR(evntually also BLE) controlled volume controller for analog audio. It sits between your audio source and speakers and can amplify or reduce the volume using IR commands (and evntually BLE).
53 parts3MIT - 6 layers51 × 65 mm
- 4 layers88.9 × 79.4 mm
Link
oats-center/avena-rs
Avena On The Road: Bringing pavement health data to your fingertips
170 parts3
Questions
How big is the BalancedAudioBox PCB?
It measures 81 × 73 mm and has 2 copper layers, 1.6 mm thick.
What parts does the BalancedAudioBox use?
65 parts, built around the DRV135UA/2K5G4, DPU01L-15, LM27762DSS and PCM5102PW. 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 BalancedAudioBox KiCad files?
From the samo4/BalancedAudioBox repository on GitHub, at the commit this page was made from: the board is BalancedAudioBox.kicad_pcb and its schematic BalancedAudioBox.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the BalancedAudioBox design in my own project?
Its repository states no licence, so its author keeps all rights: ask samo4 before reusing the design.