2 layers171 × 80 mm
4 layers170 × 101 mm
FreeDSP G
freeDSP/FreeDSP-G7ADAU1467 DSP Board for Electric Guitar Players
- Size
- 170 × 101 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 377
- Nets
- 314
- Pads
- 1,144
- Tracks, vias
- 2,963, 282
- Pours
- 12
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 21 Mar 2025
- Updated
- 29 Mar 2026
Overview
FreeDSP G is an open-source printed circuit board by freeDSP, from the freeDSP/FreeDSP-G repository on GitHub, published under the CC0-1.0 licence. It is a 4-layer board of 170 × 101 mm with 377 parts on 314 nets, routed with 2,963 tracks and 282 vias.
It is built around the OPA1678IDRGR, PCM1808QPWRQ1 and LM317AG-TN3-R, with the 74LVC1G04Z, AMS1117-3.3 and GZ1608D601TF among its other parts. Its parts include 138 capacitors, 131 resistors, 13 ICs, 13 diodes and 12 transistors. It belongs with the audio and music boards of this library.
Main components
12
OPA1678IDRGR
WSON-8-EP(3x3)-18V~-2.25V、2.25V~18V -40℃~+85℃ 10pA 10pA 110dB 16MHz 2 2mA 2uV/℃ 4.5V~36V 4.5nV/√Hz@1kHz 500uV 50mA 9V/us Built-in compensation、ESD protection Rail-to-rail output WSON-8-EP(3x3) Operational Amplifier ROHSTexas InstrumentsAudio Amplifiers
PCM1808QPWRQ1
TSSOP-14-40℃~+125℃ 1uA、150uA 2 2.7V~3.6V、4.5V~5.5V 24 96000Hz Audio Analog-to-Digital Converter Built-in TSSOP-14 ADCs/DACs - Special Purpose ROHSTexas InstrumentsADCs/DACs - Special Purpose
LM317AG-TN3-R
TO-252-2(DPAK)-40℃~+85℃ 1 1.2V~37V 1.5A 40V 5V@(500mA) 80dB@(120Hz) Adjustable Over Current Protection、Over Temperature Protection、Short Circuit Protection Positive TO-252-2(DPAK) Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSUTCVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
74LVC1G04Z
SOT-553-40℃~+125℃ 1 1 1.65V~5.5V 1.7V~2V 200uA 32mA 32mA 5ns@5V,50pF 700mV~800mV 74LVC SOT-553 Inverters ROHSDiodes IncorporatedInverters
AMS1117-3.3
SOT-223-40℃~+125℃ 0.003%Vout 1 1.1V@(800mA) 15V 1A 3.3V 5mA 72dB@(120Hz) Fixed Over Current Protection、Short Circuit Protection、Thermal shutdown Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSAdvanced Monolithic SystemsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
GZ1608D601TF
0603-55℃~+125℃ 1 200mA 450mΩ 600Ω@100MHz ±25% 0603 Ferrite Beads ROHSSunlordFerrite Beads
NMJ6HCD2
插件插件 Audio Connectors ROHSNeutrikAudio Connectors (Headphones)220UF 10V 5*7
插件,5x7mm1000hrs@105℃ 10V 220uF 2mm 5mm 7mm 插件,5x7mm Aluminum Electrolytic Capacitors - Leaded ROHSLCSCAluminum Electrolytic Capacitors - Leaded
AO3400A
SOT-23-55℃~+150℃ 1 N-channel 1.45V 1.4W 30V 48mΩ@2.5V 5.7A 50pF 630pF 75pF 7nC@10V N-Channel SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs2SD2704KT146
SOT-23-55℃~+150℃ 1 NPN 100nA 200mW 20V 25V 300mA 35MHz 50mV 820 NPN SOT-23 Bipolar (BJT) ROHSROHM SemiconductorBipolar (BJT)AO3401A
SOT-231 P-Channel 14nC@10V 30V 47mΩ@10V、60mΩ@4.5V、85mΩ@2.5V 4A 55pF 645pF 80pF 900mV SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETsMMBT5401
SOT-23-55℃~+150℃ 1 PNP 100MHz 100nA 150V 300 300mW 500mV 5V 600mA PNP SOT-23 Bipolar (BJT) ROHSJiangsu Changjing Electronics Technology (CJ)Bipolar (BJT)
README
README.mdFreeDSP-G (ADAU1467 DSP BOARD)
ADAU1467 DSP Board for Electic Guitar Players. The latest version design is 0.2
Features
Tube Electric Guitar Amplifier Simulator
- A simple single DSP board concept
- 6.5mm Phone Jack I/O connector
- KARAOKE (Play-along) feature
- Effect loop function with plug insert detection feature
- Stereo Output
- Headphones output
- Switchable Dual 7 Potentiometer Controls
- Dual Color LED indicator x1
- Single Color LED x1
- 3 Momentary-ON Footswitches with LED indicator
- Optical S/PDIF Input and Output
- 3.5mm Stereo Analog signal Input with plug insert detection and rotary volume control feature.
- USB-C Audio Input (44.1kHZ/48kHz)
- Embedded BM83 Bluetooth Audio Interface (Option)
- BGM mix level control (POT-7)
- DSP reset button
- Selfboot disable jumper
- Brite(Hi-Boost) Jumper
- Triodizer Head Amplifier with bypass option
- USBi 10P IDC pin-Header with Shoruld
Wiki Page: https://github.com/freeDSP/FreeDSP-G/wiki
Parts
377| Qty | Value | Footprint | References |
|---|---|---|---|
| 49 | 0.1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C10, C100, C102, C109, C111, C113, C116, C119, C121, C123, C125, C127, C128, C129, C131, C133 +33 |
| 29 | 10uF | Capacitor_SMD:C_0805_2012Metric | C15, C18, C19, C21, C25, C28, C37, C39, C40, C41, C43, C106, C114, C117, C132, C137 +13 |
| 29 | 33R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R11, R61, R100, R101, R102, R103, R104, R105, R106, R107, R108, R109, R110, R123, R124, R125 +13 |
| 18 | GZ1608D601TF | Inductor_SMD:L_0603_1608Metric_Pad1.05x0.95mm_HandSolder | FB1, FB2, FB3, FB4, FB5, FB6, FB7, FB10, FB11, FB12, FB13, FB14, FB15, FB16, FB17, FB18 +2 |
| 13 | 100k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R13, R21, R22, R24, R29, R31, R32, R59, R60, R79, R82, R113, R115 |
| 12 | 100pF_C0G | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C1, C2, C29, C30, C33, C48, C49, C58, C59, C60, C61, C101 |
| 9 | 1uF | Capacitor_SMD:C_0805_2012Metric | C12, C20, C22, C24, C26, C27, C86, C87, C88 |
| 8 | 1uF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C110, C112, C115, C118, C120, C122, C124, C126 |
| 8 | 47R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R49, R50, R51, R52, R53, R54, R89, R94 |
| 8 | B5819W SL | Diode_SMD:D_SOD-123 | D4, D5, D7, D8, D9, D11, D14, D15 |
| 7 | 1MEG | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R14, R15, R18, R78, R80, R81, R83 |
| 7 | 1k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R20, R47, R74, R85, R87, R117, R128 |
| 6 | 10k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R16, R77, R116, R119, R120, R121 |
| 6 | 47k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R28, R30, R34, R37, R38, R84 |
| 6 | NOP | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R26, R126, R127, R130, R131, R132 |
| 5 | 1000pF/250V | Capacitor_SMD:C_0805_2012Metric | C50, C51, C52, C53, C104 |
| 5 | NMJ6HCD2 | MyJacks:PJ-644C_NMJ6HCD2_ACJS-IH | J1, J2, J7, J9, J10 |
| 4 | 100R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R3, R63, R64, R71 |
| 4 | 10uF/16V(Ta) | Capacitors_Tantalum_SMD:CP_Tantalum_Case-A_EIA-3216-18_Reflow | C54, C55, C56, C57 |
| 4 | 2.2k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R5, R6, R111, R112 |
| 4 | 220R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R39, R40, R41, R42 |
| 4 | 27k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R43, R44, R45, R46 |
| 4 | 3.3k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R8, R70, R76, R114 |
| 3 | 0R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R4, R33, R57 |
| 3 | 10R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R55, R56, R73 |
| 3 | 220uF/10V | Capacitor_THT:CP_Radial_D7.5mm_P2.50mm | C75, C76, C138 |
| 3 | 22k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R17, R65, R66 |
| 3 | 4.7k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R23, R25, R27 |
| 3 | AO3400A | Package_TO_SOT_SMD:SOT-23 | Q9, Q12, Q13 |
| 3 | Conn_01x08 | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J12, J14, J15 |
| 3 | OPA1678IDR | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U4, U5, U6 |
| 2 | 100uF | Capacitor_SMD:C_1206_3216Metric | C99, C103 |
| 2 | 100uF/6.3V | Capacitor_SMD:C_1206_3216Metric | C94, C95 |
| 2 | 10nF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C108, C130 |
| 2 | 10uF/50V | Capacitor_SMD:C_0805_2012Metric | C77, C96 |
| 2 | 150R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R72, R118 |
| 2 | 180R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R48, R129 |
| 2 | 18k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R1, R2 |
| 2 | 2SD2704KT146 | Package_TO_SOT_SMD:SOT-23 | Q3, Q4 |
| 2 | 47uF/6.3V | Capacitor_SMD:C_0805_2012Metric | C91, C92 |
| 2 | 68k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R35, R36 |
| 2 | AO3401A | Package_TO_SOT_SMD:SOT-23 | Q8, Q11 |
| 2 | D_Schottky_5A | Diode_SMD:D_SMA | D1, D2 |
| 2 | Header_2P | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J11, J18 |
| 2 | LED_WHITE | LED_SMD:LED_0603_1608Metric_Castellated | D3, D12 |
| 2 | LM317AG-TN3-R | Package_TO_SOT_SMD:TO-252-2 | U8, U10 |
| 2 | MMBT5401 | Package_TO_SOT_SMD:SOT-23 | Q5, Q6 |
| 2 | PCM1808QPWR | Myfootprints:PCM1808QPWRQ1 | IC3, IC4 |
| 2 | PCM5102APWR | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | IC1, IC2 |
| 2 | SMD-INDUCTOR-10UH-0603 | Inductor_SMD:L_0603_1608Metric | L3, L4 |
| 2 | SolderJumper_3_Bridged12 | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP1, JP2 |
| 1 | 100R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R19 |
| 1 | 1.8k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R10 |
| 1 | 100nF | Capacitor_SMD:C_0805_2012Metric | C13 |
| 1 | 10kA_Dual | Myfootprints:RK09712 | RV2 |
| 1 | 10uF/16V | Capacitor_Tantalum_SMD:CP_EIA-2012-12_Kemet-R | C14 |
| 1 | 150pF | Capacitor_SMD:C_0805_2012Metric | C107 |
| 1 | 15k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R67 |
| 1 | 180k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R122 |
| 1 | 1N4148W | Diode_SMD:D_SOD-123 | D6 |
| 1 | 1uF/50V | Capacitor_SMD:C_0805_2012Metric | C81 |
| 1 | 220uF/16V | Capacitor_THT:CP_Radial_D7.5mm_P2.50mm | C98 |
| 1 | 22uH(2.5A) | Inductor_SMD:L_Taiyo-Yuden_NR-60xx_HandSoldering | L2 |
| 1 | 25AA1024(512) | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U13 |
| 1 | 2SK208GR | TO_SOT_Packages_SMD:SC-59 | Q2 |
| 1 | 2SK30A-GR | TO_SOT_Packages_THT:TO-92_Inline_Narrow_Oval | Q14 |
| 1 | 330R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R68 |
| 1 | 4.3k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R86 |
| 1 | 4700pF | Capacitor_SMD:C_0805_2012Metric | C105 |
| 1 | 470K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R12 |
| 1 | 470pF | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C11 |
| 1 | 470uF/16V | Capacitor_THT:CP_Radial_D10.0mm_P2.50mm_P5.00mm | C139 |
| 1 | 47uF/10V | Capacitor_SMD:C_1206_3216Metric | C93 |
| 1 | 5.6k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R75 |
| 1 | 5077CR-16-SMC2 | MyJacks:USB-C_5077CR-16-SMC2-BK-TR | J17 |
| 1 | 680R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R69 |
| 1 | 74LVC1G04 | Package_TO_SOT_SMD:SOT-23-5_HandSoldering | U11 |
| 1 | ADAU1467 | Myfootprints:ADAU1467WBCPZ300 | U12 |
| 1 | AMS1117-3.3 | digikey-footprints:SOT-223 | U9 |
| 1 | AO3400A | TO_SOT_Packages_SMD:SOT-23 | Q1 |
The 342 most common of 377 parts.
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Questions
How big is the FreeDSP G PCB?
It measures 170 × 101 mm and has 4 copper layers, 1.6 mm thick.
What parts does the FreeDSP G use?
377 parts, built around the OPA1678IDRGR, PCM1808QPWRQ1, LM317AG-TN3-R and 74LVC1G04Z. 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 FreeDSP G KiCad files?
From the freeDSP/FreeDSP-G repository on GitHub, at the commit this page was made from: the board is kiCAD/FreeDSP-G_MAIN/FreeDSP-G.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the FreeDSP G design in my own project?
Its repository publishes it under the CC0-1.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).