FreeDSP Classic SMD
About the FreeDSP Classic SMD PCB
FreeDSP Classic SMD is an open source PCB design by mischuja, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 67.3 × 92.3 mm, with 170 components from 58 distinct parts.
Other key parts include the ADAU1701, 24AA256SN, LME49721, SN74LVC3G14 and LM393. By type, the board carries 52 capacitors, 48 resistors, 20 connectors, 18 transistors, 11 diodes and 7 ICs.
From the project
LICENCE: Creative Commons Attribution Share-Alike 4.0 license
LICENCE: Creative Commons Attribution Share-Alike 4.0 license
The freeDSP is an open-source digital signal processor family for the do-it-yourself community. The applications range from active loudspeaker concepts (digital crossovers, bass enhancement, ...) and room equalization over advanced musical effect processors to car audio signal processing.
This freeDSP Classic SMD-B is a updated SMD version of the original freeDSP Classic with a few improvements/changes. This board has been designed using the Cross-Platform Open Source Tool KiCad.
Main components on the FreeDSP Classic SMD
FreeDSP Classic SMD bill of materials (BOM)
170 components, 58 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ADAU1701 | LQFP-48_7x7mm_Pitch0.5mm | U1 |
| 1 | 24AA256SN | SOIC-8_3.9x4.9mm_Pitch1.27mm | U2 |
| 2 | LME49721 | SOIC-8_3.9x4.9mm_Pitch1.27mm | U3, U4 |
| 1 | SN74LVC3G14 | DCT | U5 |
| 1 | LM393 | SOIC-8_3.9x4.9mm_Pitch1.27mm | U6 |
| 1 | IDT2305NZ | SOIC-8_3.9x4.9mm_Pitch1.27mm | U7 |
| 5 | BSS123 | SOT-23_Handsoldering | Q1, Q2, Q3, Q4, Q18 |
| 1 | FZT751TA | SOT-223 | Q5 |
| 8 | BSH103,215 | SOT-23_Handsoldering | Q6, Q7, Q8, Q9, Q10, Q11, Q12, Q13 |
| 4 | MMBF5434 | SOT-23_Handsoldering | Q14, Q15, Q16, Q17 |
| 1 | ASV-24.576MHz-EJ-T | Oscillator_SMD_Abracon_ASV-4pin_7.0x5.1mm_HandSoldering | X1 |
| 6 | RCA_01 | RCA_RCJ-01x | J1, J2, J4, J5, J6, J7 |
| 1 | CONN_01X02 | RIACON101-2 | J3 |
| 1 | CONN_01X06 | Pin_Header_Straight_1x06 | P1 |
| 1 | CONN_01X03 | Pin_Header_Straight_1x03 | P2 |
| 1 | CONN_02X05 | IDC_Header_Straight_10pins | P3 |
| 4 | STDCONN | IDC_Header_Straight_16pins | P4, P5, P6, P7 |
| 6 | CONN_02X03 | Pin_Header_Straight_2x03 | P8, P9, P10, P11, P12, P13 |
| 2 | x | C_Radial_D5_L11_P2 | C_res1, C_res3 |
| 1 | x | C_1206_HandSoldering | C_res2 |
Show 38 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 220n | C_1206_HandSoldering | Cboot1 |
| 1 | 2u2 | C_1206_HandSoldering | Cin1 |
| 1 | 47u | C_1206_HandSoldering | Cout1 |
| 1 | LM284x | SOT23-6_1.7x3.0mm_Pitch0.95mm | LM1 |
| 1 | 3.32k | R_1206_HandSoldering | Rfb1 |
| 1 | 1.02k | R_1206_HandSoldering | Rfb2 |
| 1 | SW_PUSH | SW_PUSH_6mm | SW1 |
| 4 | B150 | SMA | D1, D2, D3, D5 |
| 1 | P6SMB 27V | SMB | D4 |
| 5 | 1N4148 | SOD-123W | D6, D7, D8, D9, D10 |
| 1 | LED | R_1206_HandSoldering | D11 |
| 2 | 330 | C_0805_HandSoldering | FB1, FB2 |
| 1 | 47u | Choke_SMD_6.0x5.8 | L1 |
| 20 | 100n | C_1206_HandSoldering | C1, C3, C4, C6, C8, C9, C10, C11 +12 |
| 11 | 10u | C_Radial_D5_L11_P2 | C2, C5, C7, C14, C32, C33, C34, C35 +3 |
| 3 | 10u | C_1206_HandSoldering | C12, C15, C54 |
| 1 | 3n3 | C_1206_HandSoldering | C18 |
| 1 | 56n | C_1206_HandSoldering | C19 |
| 4 | 100p | C_1206_HandSoldering | C20, C21, C22, C23 |
| 4 | 330p | C_1206_HandSoldering | C24, C25, C26, C27 |
| 4 | 5.6n | C_1206_HandSoldering | C28, C29, C30, C31 |
| 2 | 47u | C_Radial_D5_L11_P2 | C38, C39 |
| 1 | 10n | C_1206_HandSoldering | C46 |
| 1 | 2.2u | C_Radial_D5_L11_P2 | C49 |
| 10 | 10K | R_1206_HandSoldering | R1, R2, R3, R4, R5, R7, R9, R10 +2 |
| 4 | 1K | R_1206_HandSoldering | R6, R36, R41, R42 |
| 3 | 18K | R_1206_HandSoldering | R8, R32, R35 |
| 1 | 475 | R_1206_HandSoldering | R11 |
| 4 | 2k | R_1206_HandSoldering | R12, R13, R14, R15 |
| 4 | 16k | R_1206_HandSoldering | R16, R17, R18, R19 |
| 5 | 330 | R_1206_HandSoldering | R20, R21, R22, R23, R48 |
| 6 | 49k9 | R_1206_HandSoldering | R24, R25, R26, R27, R28, R29 |
| 2 | 7k | R_1206_HandSoldering | R30, R33 |
| 2 | 8k | R_1206_HandSoldering | R31, R34 |
| 1 | 390k | R_1206_HandSoldering | R37 |
| 1 | 1M | R_1206_HandSoldering | R40 |
| 1 | 470k | R_1206_HandSoldering | R43 |
| 4 | 24 | R_1206_HandSoldering | R44, R45, R46, R47 |
FreeDSP Classic SMD design files
The KiCad project lives in the mischuja/SigmaDSP repository on GitHub; these links point at the commit this page was built from.
FreeDSP Classic SMD: common questions
How big is the FreeDSP Classic SMD PCB?
The FreeDSP Classic SMD measures 67.3 × 92.3 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the FreeDSP Classic SMD?
170 components, from 58 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 FreeDSP Classic SMD design files?
From the mischuja/SigmaDSP repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the FreeDSP Classic SMD design in my own project?
Yes, under the terms of its GPL-3.0 license, which mischuja chose for the repository.
