Blep audio
About the Blep audio PCB
Blep audio is an open source RP2040/RP2350 PCB design by CRImier, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 60.6 × 24.1 mm, with 75 components from 38 distinct parts.
Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the SL2.1A, AP1117-33, ME6212C18M5G, ME6212C30M5G and SY6280AAAC. By type, the board carries 33 capacitors, 22 resistors, 7 connectors, 6 ICs, 4 inductors and 3 switches.
It belongs with the audio and dev boards & breakouts designs in this gallery.
From the project
My KiCad boards. Can't be bothered uploading individually anymore, so here you go.
This is a repository where I upload [almost] everything that I design in KiCad. As usual, if you think your work warrants doing backups, just upload it to a git repo ;-P I hope this will be useful.
About 50% of all of the PCBs have a README describing what they're meant for and the PCBs physical parameters, the README follows the TEMPLATE.md standard. I'll be adding more READMEs as I go.
Main components on the Blep audio
Blep audio bill of materials (BOM)
75 components, 38 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | SL2.1A ALC5640-VB-CG | QFN-48-1EP_6x6mm_P0.4mm_EP4.4x4.4mm | U1 |
| 1 | AP1117-33 MCP23008-xML | QFN-20-1EP_4x4mm_P0.5mm_EP2.7x2.7mm | U2 |
| 1 | RP2040 BL24C32A-NTRC | DFN-8_L3.0-W2.0-P0.50-BL-EP | U4 |
| 1 | ME6212C18M5G | SOT-23-5 | U7 |
| 1 | ME6212C30M5G | SOT-23-5 | U8 |
| 1 | SY6280AAAC | SOT-23-5 | U22 |
| 1 | EAROUT_L | PinHeader_1x02_P2.54mm_Vertical | J1 |
| 1 | USB_C_RECEPTACLE_USB2.0 EXP | PinHeader_1x23_P2.54mm_Vertical | J2 |
| 1 | EAROUT_R | PinHeader_1x02_P2.54mm_Vertical | J3 |
| 1 | PDM_MIC | PinHeader_1x05_P2.54mm_Vertical | J4 |
| 1 | I2S2 | PinHeader_1x07_P2.54mm_Vertical | J5 |
| 1 | HP | PinHeader_1x04_P2.54mm_Vertical | J6 |
| 1 | AINOUT | PinHeader_1x05_P2.54mm_Vertical | J7 |
| 3 | EVQPUL02K | Panasonic_EVQPUL_EVQPUC | SW1, SW2, SW3 |
| 4 | BLM18EG601SN1 | L_0603_1608Metric | L1, L2, L3, L4 |
| 5 | 100NF 2.2uF | C_0402_1005Metric | C1, C3, C4, C6, C7 |
| 6 | 100NF 100nF | C_0402_1005Metric | C2, C9, C10, C11, C17, C18 |
| 4 | 100NF 4.7uF | C_0402_1005Metric | C5, C8, C14, C15 |
| 1 | 1UF 680pF | C_0402_1005Metric | C12 |
| 1 | 100NF 680pF | C_0402_1005Metric | C13 |
Show 18 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1UF 100nF | C_0402_1005Metric | C16 |
| 2 | 18PF 100nF | C_0402_1005Metric | C19, C20 |
| 5 | 2.2uF | C_0402_1005Metric | C21, C23, C25, C27, C29 |
| 6 | 100nF | C_0402_1005Metric | C22, C24, C26, C28, C52, C54 |
| 2 | 680pF | C_0402_1005Metric | C30, C31 |
| 1 | 5K1 51K | R_0402_1005Metric | R1 |
| 1 | C17477 NP | R_0402_1005Metric | R2 |
| 1 | 5K1 0R | R_0402_1005Metric | R3 |
| 6 | C21189 33 | R_0402_1005Metric | R4, R6, R7, R9, R10, R11 |
| 1 | C21189 0R | R_0402_1005Metric | R5 |
| 1 | C21189 NP | R_0402_1005Metric | R8 |
| 3 | 33 | R_0402_1005Metric | R12, R14, R15 |
| 1 | C17477 33 | R_0402_1005Metric | R13 |
| 3 | 51K | R_0402_1005Metric | R16, R17, R60 |
| 1 | NP | R_0402_1005Metric | R18 |
| 1 | 5K1 NP | R_0402_1005Metric | R19 |
| 1 | 2.2K | R_0402_1005Metric | R20 |
| 1 | 10K | R_0402_1005Metric | R55 |
Blep audio design files
The KiCad project lives in the CRImier/MyKiCad repository on GitHub; these links point at the commit this page was built from.
Blep audio: common questions
What microcontroller does the Blep audio use?
The Blep audio is built around the RP2040, from the RP2040/RP2350 family.
How big is the Blep audio PCB?
The Blep audio measures 60.6 × 24.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Blep audio?
75 components, from 38 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 Blep audio design files?
From the CRImier/MyKiCad repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Blep audio design in my own project?
Yes, under the terms of its GPL-3.0 license, which CRImier chose for the repository.
Can I test firmware for the Blep audio without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.
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