Before final bypass
About the Before final bypass PCB
Before final bypass is an open source RP2040/RP2350 PCB design by JesseLevine727, published on GitHub. It is a 4-layer board measuring 90 × 70 mm, with 58 components from 27 distinct parts.
Its main chip is the RP2040, from the RP2040/RP2350 family. Other key parts include the W25Q16JVSNIQ, AP2112K-3.3TRG1, VL53L1CXV0FY/1 and MAX98357AETE+T. By type, the board carries 23 capacitors, 19 resistors, 5 ICs, 3 connectors, 3 switches and 2 diodes.
It belongs with the audio and sensors designs in this gallery.
From the project
Open airnote.kicadpro in KiCad 9. The three editable schematic sheets and routed four-layer PCB are the canonical design. The current native checks report 0 ERC violations; 0 DRC violations, 0 unconnected items and 0 schematic/PCB parity issues**. These are software checks; a phy
Open airnote.kicadpro in KiCad 9. The three editable schematic sheets and routed four-layer PCB are the canonical design. The current native checks report 0 ERC violations; 0 DRC violations, 0 unconnected items and 0 schematic/PCB parity issues**. These are software checks; a physical board has not been built or tested.
- Schematic PDF - Board render - Assembly drawing, including component references - Four copper layers - Exact component BOM - Draft fabrication and assembly exports - Native ERC and DRC - Independent review
Main components on the Before final bypass
Before final bypass bill of materials (BOM)
58 components, 27 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | RP2040 Raspberry Pi | QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U1 |
| 1 | W25Q16JVSNIQ W25Q16JVSSIQ Winbond | SOIC-8_3.9x4.9mm_P1.27mm | U2 |
| 1 | AP2112K-3.3TRG1 AP2112K-3.3 Diodes Inc. | SOT-23-5 | U3 |
| 1 | VL53L1CXV0FY/1 STMicroelectronics | ST_VL53L1x | U4 |
| 1 | MAX98357AETE+T Analog Devices | MAX98357A_T1633_ADI_90-0031 | U5 |
| 1 | ABM8-272-T3 12MHz ABM8-272-T3 Abracon | Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | USB4105-GF-A-120 USB-C USB2.0 GCT | USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J1 |
| 1 | C32713271 SWD 3V3 GND DIO CLK RUN hanxia | PinHeader_1x05_P2.54mm_Vertical | J2 |
| 1 | C131337 SPEAKER 8ohm >=1W JST | JST_PH_B2B-PH-K_1x02_P2.00mm_Vertical | J3 |
| 1 | 1206L050YR 500mA hold PTC Littelfuse | Fuse_1206_3216Metric | F1 |
| 1 | PTV09A-4015F-B103 10k LINEAR VOLUME Bourns | Potentiometer_Bourns_PTV09A-1_Single_Vertical | RV1 |
| 1 | TL3342F160QG BOOTSEL E-Switch | SW_SPST_TL3342 | SW1 |
| 1 | TL3342F160QG RESET E-Switch | SW_SPST_TL3342 | SW2 |
| 1 | JS202011JCQN MUTE / PLAY C&K | SW_DPDT_CK_JS202011JCQN | SW3 |
| 1 | USBLC6-2SC6 STMicroelectronics | SOT-23-6 | D1 |
| 1 | LTST-C190KGKT GREEN STATUS Lite-On | LED_0603_1608Metric | D2 |
| 2 | CL10C150JB8NNNC 15p Samsung Electro-Mechanics | C_0603_1608Metric | C1, C2 |
| 15 | CC0603KRX7R9BB104 100n Yageo | C_0603_1608Metric | C3, C4, C5, C6, C7, C8, C9, C10 +7 |
| 4 | CL10A105KB8NNNC 1u Samsung Electro-Mechanics | C_0603_1608Metric | C13, C14, C16, C17 |
| 2 | CL21A475KAQNNNE 4.7u Samsung Electro-Mechanics | C_0805_2012Metric | C20, C22 |
Show 7 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 4 | 0603WAF1001T5E 1k UNI-ROYAL | R_0603_1608Metric | R1, R3, R17, R18 |
| 6 | 0603WAF1002T5E 10k UNI-ROYAL | R_0603_1608Metric | R2, R4, R10, R11, R14, R16 |
| 1 | 0603WAF100KT5E 1 UNI-ROYAL | R_0603_1608Metric | R5 |
| 4 | 0603WAF5101T5E 5.1k UNI-ROYAL | R_0603_1608Metric | R6, R7, R12, R13 |
| 2 | 0603WAF270JT5E 27 UNI-ROYAL | R_0603_1608Metric | R8, R9 |
| 1 | 0603WAF1003T5E 100k UNI-ROYAL | R_0603_1608Metric | R15 |
| 1 | 0603WAF1004T5E 1M UNI-ROYAL | R_0603_1608Metric | R19 |
Before final bypass design files
The KiCad project lives in the JesseLevine727/AirNote repository on GitHub; these links point at the commit this page was built from.
Before final bypass: common questions
What microcontroller does the Before final bypass use?
The Before final bypass is built around the RP2040, from the RP2040/RP2350 family.
How big is the Before final bypass PCB?
The Before final bypass measures 90 × 70 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Before final bypass?
58 components, from 27 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 Before final bypass design files?
From the JesseLevine727/AirNote repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.
Can I use the Before final bypass design in my own project?
The repository has no license, so all rights stay with JesseLevine727. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Before final bypass 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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