AddOnA
About the AddOnA PCB
AddOnA is an open source PCB design by freeDSP, published on GitHub under the CC-BY-SA-4.0 license. It is a 2-layer board measuring 178 × 39 mm, with 55 components from 47 distinct parts.
Other key parts include the ADAU1452WBCPZ, 25AA1024T-I/SM and TLE2426IDR. By type, the board carries 20 resistors, 13 crystals, 12 capacitors, 3 ICs, 2 switches and 1 connector.
It belongs with the iot & wireless and audio designs in this gallery.
From the project
freeDSP ADAU1452 with 8 analog input, 8 analog outputs, S/P-DIF I/O, ADAT I/O, USB Audio Class2, WiFi, Bluetooth
- 1x XLR Analog in - 1x RCA Analog in - 1x TOSlink in (for S/P-DIF via glassfiber) - 1x RCA Digital in (for S/P-DIF via coaxial cable) - 1x RCA Digital out (connect a subwoofer) - 1x XLR Analog Out (connect a subwoofer) - 1x USB - Volume potentiometer
Schematics and backplates v1.0.0 Schematics and backplates
Pre-amp / 7.1-management without limits.
- 8x XLR Analog Out, unbalanced (RCA) is possible too - 8x RCA Analog In - 8x XLR Analog In - 4x RCA Digital In (for S/P-DIF via Cinch) - 4x TOSlink Digital In ((for S/P-DIF via LWL) - 1x USB in
Main components on the AddOnA
AddOnA bill of materials (BOM)
55 components, 47 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ADAU1452WBCPZ PCA9536D Analog Devices Inc. | SOIC8_3.9x4.9mm_Pitch1.27mm | IC101 |
| 1 | 25AA1024T-I/SM 74HC251 Microchip Technology | SOIC-16_3.9x9.9mm_P1.27mm | IC102 |
| 1 | TLE2426IDR FIN1002 Texas Instruments | SOT23-5 | IC103 |
| 1 | 1-215079-4 XLR3 TE Connectivity AMP Connectors | NC3FAH | X101 |
| 1 | PRPC008DAAN-RC XLR3 Sullins Connector Solutions | NC3MAH | X102 |
| 1 | PRPC003SAAN-RC Conn_01x03 Sullins Connector Solutions | Molex_PicoBlade_530470310 | X103 |
| 1 | 1-215079-0 CON_IDC26 TE Connectivity AMP Connectors | IDC26 | X104 |
| 1 | 0430450428 RCA Molex, LLC | PJRAN1X1U01AUX | X105 |
| 1 | PLT133_T10W | PLT133_T10W | X106 |
| 1 | CON_IDC26 | IDC26 | X107 |
| 1 | PLR135_T10 | PLR135_T10 | X108 |
| 1 | MicroMatch14 | MM-14G | X109 |
| 1 | RCA | PJRAN1X1U01AUX | X110 |
| 1 | CON_USB_B | USB_B | X111 |
| 1 | HDR_01x05 | PinHeader_1x05_P2.54mm_Vertical | X112 |
| 1 | HDR_02x08 | IDC2x8_Pitch2.54mm | X113 |
| 1 | 10K0 | RK09K1110-20 | P101 |
| 2 | TEST_1P Montagewinkel | Montagewinkel | B101, B102 |
| 2 | Switch_DPDT | GEMINI_A | SW101, SW102 |
| 1 | PESD0603-240 | D_0603_1608Metric | D101 |
Show 27 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 47u0 | C0805-X7R | L101 |
| 2 | GRM21BR61E106MA73L CAP_100p_50V_C0G_NP0_0805 Murata Electronics North America | C0805-X7R | C101, C104 |
| 1 | C0805C104K5RACTU CAP_100p_50V_C0G_NP0_0805 KEMET | C0805-X7R | C102 |
| 1 | CC0805KRX7R9BB562 CAP_100n_50V_X7R_0805 Yageo | C0805-X7R | C103 |
| 3 | C0805C104K5RACTU CAP_100n_50V_X7R_0805 KEMET | C0805-X7R | C105, C109, C110 |
| 1 | C0805C151J5GACTU CAP_100n_50V_X7R_0805 KEMET | C0805-X7R | C106 |
| 1 | C0805C220J5GACTU CAP_10n0_50V_X7R_0805 KEMET | C0805-X7R | C107 |
| 1 | C0805C220J5GACTU CAP_100n_50V_X7R_0805 KEMET | C0805-X7R | C108 |
| 2 | GRM21BR61E106MA73L CAP_100n_50V_X7R_0805 Murata Electronics North America | C0805-X7R | C111, C112 |
| 2 | TC164-JR-0733RL RES_100R_1%_0.25W_Thin_0805 Yageo | C0805-RES | R101, R104 |
| 1 | TC164-JR-0733RL RES_100K_1%_0.125W_Thick_0805 Yageo | C0805-RES | R102 |
| 1 | RC0805FR-071KL RES_68R0_1%_0.125W_Thin_0805 Yageo | C0805-RES | R103 |
| 1 | TC164-JR-0733RL RES_68R0_1%_0.125W_Thin_0805 Yageo | C0805-RES | R105 |
| 1 | RC0805FR-074K32L RES_100K_1%_0.125W_Thick_0805 Yageo | C0805-RES | R106 |
| 1 | RC0805FR-0710KL RES_100R_1%_0.25W_Thin_0805 Yageo | C0805-RES | R107 |
| 1 | RC0805FR-07100RL RES_220K_1%_0.125W_Thick_0805 Yageo | C0805-RES | R108 |
| 1 | RC0805FR-0733RL RES_47K0_1%_0.125W_Thick_0805 Yageo | C0805-RES | R109 |
| 1 | RC0805FR-072KL RES_47K0_1%_0.125W_Thick_0805 Yageo | C0805-RES | R110 |
| 1 | RC0805FR-072KL RES_10K0_1%_0.125W_Thick_0805 Yageo | C0805-RES | R111 |
| 1 | RC0805FR-0710KL RES_33R0_1%_0.125W_Thick_0805 Yageo | C0805-RES | R112 |
| 1 | RC0805FR-0710KL RES_470R_1%_0.125W_Thick_0805 Yageo | C0805-RES | R113 |
| 1 | RC0805FR-071KL RES_91R0_1%_0.125W_Thick_0805 Yageo | C0805-RES | R114 |
| 1 | RC0805FR-07100KL RES_33R0_1%_0.125W_Thick_0805 Yageo | C0805-RES | R115 |
| 1 | RNCP0805FTD150R RES_820R_1%_0.125W_Thick_0805 Stackpole Electronics Inc. | C0805-RES | R116 |
| 1 | RC0805FR-07931RL RES_470R_1%_0.125W_Thick_0805 Yageo | C0805-RES | R117 |
| 1 | RES_470R_1%_0.125W_Thick_0805 | C0805-RES | R118 |
| 2 | RES_47K0_1%_0.125W_Thick_0805 | C0805-RES | R119, R120 |
AddOnA design files
The KiCad project lives in the freeDSP/freeDSP-aurora repository on GitHub; these links point at the commit this page was built from.
AddOnA: common questions
How big is the AddOnA PCB?
The AddOnA measures 178 × 39 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the AddOnA?
55 components, from 47 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the AddOnA design files?
From the freeDSP/freeDSP-aurora repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the AddOnA design in my own project?
Yes, under the terms of its CC-BY-SA-4.0 license, which freeDSP chose for the repository.
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