FreeDSP Classic SMD AB plus-II
About the FreeDSP Classic SMD AB plus-II PCB
FreeDSP Classic SMD AB plus-II is an open source PCB design by CyberPit, published on GitHub. It is a 2-layer board measuring 134 × 109.5 mm, with 225 components from 62 distinct parts.
Other key parts include the ADAU1701, 24AA256, PCM5102APWR, LME49720 and SN74LV541APWR. By type, the board carries 93 resistors, 70 capacitors, 15 connectors, 13 transistors, 11 ICs and 9 diodes.
It belongs with the audio designs in this gallery.
From the project
An extended version of FreeDSP Classic SMD A/B
- 2in6out RCA jacks - Integrated FreeUSBi - A/B Selectable EEPROMs - PCM5102A for DIG6/7 - ADAU1701 Board with selectable A/B Boot - 0805(2.0mm x 1.25mm) SMD Resistors & Capacitors - Through-Hole Ele-Caps - Unity Gain Analog Audio I/O - Absolute Phase transparent. - Power ON/OFF/Reset Audio Pops Mute - Buffered I2S I/O Headers (with Enable control feature) - I6S Header pin for external DACs.
Main components on the FreeDSP Classic SMD AB plus-II
FreeDSP Classic SMD AB plus-II bill of materials (BOM)
225 components, 62 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ADAU1701 | LQFP-48_7x7mm_Pitch0.5mm | IC1 |
| 2 | 24AA256 | SOIC-8_3.9x4.9mm_Pitch1.27mm | IC2, IC3 |
| 1 | PCM5102APWR | TSSOP-20_4.4x6.5mm_P0.65mm | IC4 |
| 4 | LME49720 | SOIC127P600X175-8N | U1, U3, U4, U5 |
| 1 | SN74LV541APWR | TSSOP-20_W4.4mm | U2 |
| 2 | AZ1117-ADJ | SOT-223-3_TabPin2 | U6, U7 |
| 4 | 2SC3326 | SOT-23 | Q1, Q3, Q5, Q7 |
| 4 | AO3400A | SOT-23 | Q2, Q4, Q6, Q13 |
| 1 | KTA1040D-Y-RTF/P | TO-252-2 | Q8 |
| 2 | AO3400A | SOT-23-3 | Q9, Q11 |
| 2 | AO3401A | SOT-23 | Q10, Q12 |
| 1 | 12.288MHz | Crystal_HC49-U_Vertical | X1 |
| 1 | Conn_01x02 | PinHeader_1x02_P2.54mm_Vertical | J1 |
| 8 | Conn_RCA | RJ-2410N | J2, J4, J5, J6, J7, J8, J11, J12 |
| 1 | Conn_02x10_Odd_Even | IDC-Header_2x10_P2.54mm_Vertical | J3 |
| 1 | Conn_Power_2.1mm | BARREL_JACK | J9 |
| 1 | Conn_02x08_Odd_Even | Pin_Header_Straight_2x08_Pitch2.54mm | J10 |
| 1 | MIL-10P_Angle | IDC-Header_2x05_P2.54mm_Horizontal | P1 |
| 2 | CONN_02X10 | PinSocket_2x10_P2.54mm_Vertical | P2, P3 |
| 1 | LRCLK_BRIDGE | Pin_Header_Straight_1x02_Pitch2.54mm | JP1 |
Show 42 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | BCK_BRIDGE | Pin_Header_Straight_1x02_Pitch2.54mm | JP2 |
| 1 | TACT_ANGLE_PUSH | SW_Tactile_SPST_Angled_PTS645Vx83-2LFS | JP3 |
| 2 | WE_BRIDGE | Pin_Header_Straight_1x02_Pitch2.54mm | JP4, JP5 |
| 2 | R_POT_ALPS_RK09_B10K | Potentiometer_Alps_RK09L_Double_Vertical | RV1, RV2 |
| 2 | 2MS1T1B4M7QES | 2MS1T1B4M7QES | SW1, SW2 |
| 3 | 1N4148W | D_SOD-123 | D1, D2, D3 |
| 4 | RB160M-30 | D_SOD-123 | D4, D6, D7, D8 |
| 1 | LED_RED | LED_0603_HandSoldering | D5 |
| 1 | LED_GRN | LED_0603_HandSoldering | D10 |
| 3 | BLM21PG331SN1D | 0805 | FB1, FB2, FB3 |
| 1 | CMI321609X100KT | Inductor_1212 | L1 |
| 8 | 150p | C_0805_HandSoldering | C1, C5, C7, C10, C18, C25, C29, C34 |
| 18 | 100n | C_0805_HandSoldering | C2, C17, C31, C37, C42, C44, C45, C50 +10 |
| 6 | 1000PF | C_0805_HandSoldering | C3, C8, C21, C32, C69, C70 |
| 4 | 10u | CP_Radial_D5.0mm_P2.00mm | C4, C9, C23, C33 |
| 5 | 3n3 | C_0805_HandSoldering | C6, C11, C19, C26, C35 |
| 8 | 10u | C_0805_HandSoldering | C12, C15, C16, C36, C40, C43, C65, C67 |
| 2 | 47uF/6.3 | CP_Radial_D4.0mm_P2.00mm | C13, C22 |
| 2 | 2.2uF/16 | CP_Radial_D4.0mm_P2.00mm | C14, C24 |
| 1 | 56n | C_0805_HandSoldering | C20 |
| 2 | 33p | C_0805_HandSoldering | C27, C28 |
| 10 | 2.2u | C_0805_HandSoldering | C30, C41, C47, C49, C54, C55, C56, C62 +2 |
| 2 | 220u | CP_Radial_D8.0mm_P5.00mm | C38, C39 |
| 1 | 220u/16V | CP_Radial_D10.0mm_P5.00mm | C46 |
| 1 | 10uF | C_1206_HandSoldering | C48 |
| 13 | 22k | R_0805_HandSoldering | R1, R11, R12, R18, R26, R27, R31, R42 +5 |
| 17 | 10k | R_0805_HandSoldering | R2, R4, R6, R19, R20, R23, R30, R32 +9 |
| 13 | 1k | R_0805_HandSoldering | R3, R7, R21, R24, R33, R39, R52, R58 +5 |
| 5 | 680R | R_0805_HandSoldering | R5, R22, R35, R56, R68 |
| 10 | 100R | R_0805_HandSoldering | R8, R9, R13, R14, R15, R16, R17, R48 +2 |
| 6 | 47k | R_0805_HandSoldering | R10, R25, R28, R41, R44, R62 |
| 5 | 100k | R_0805_HandSoldering | R29, R45, R67, R74, R82 |
| 4 | 0R | R_0805_HandSoldering | R34, R76, R80, R85 |
| 3 | 18k | R_0805_HandSoldering | R36, R40, R46 |
| 3 | 470R | R_0805_HandSoldering | R37, R77, R88 |
| 1 | NOPOP | R_0805_HandSoldering | R47 |
| 1 | 4.7k | R_0805_HandSoldering | R49 |
| 3 | 2k2 | R_0805_HandSoldering | R53, R54, R71 |
| 1 | NOP | R_0805_HandSoldering | R59 |
| 4 | 220R | R_0805_HandSoldering | R65, R66, R91, R92 |
| 1 | 360R | R_0805_HandSoldering | R69 |
| 3 | 1MEG | R_0805_HandSoldering | R73, R90, R94 |
FreeDSP Classic SMD AB plus-II design files
The KiCad project lives in the CyberPit/FreeDSP_Classic_SMD_AB_plus-II repository on GitHub; these links point at the commit this page was built from.
FreeDSP Classic SMD AB plus-II: common questions
How big is the FreeDSP Classic SMD AB plus-II PCB?
The FreeDSP Classic SMD AB plus-II measures 134 × 109.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the FreeDSP Classic SMD AB plus-II?
225 components, from 62 distinct parts. The full bill of materials is listed on this page.
Where can I download the FreeDSP Classic SMD AB plus-II design files?
From the CyberPit/FreeDSP_Classic_SMD_AB_plus-II repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the FreeDSP Classic SMD AB plus-II design in my own project?
The repository has no license, so all rights stay with CyberPit. Use it as a reference, and ask the author before reusing the design.
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