Blinky Bowtie
About the Blinky Bowtie PCB
Blinky Bowtie is an open source Microchip SAM PCB design by joshajohnson, published on GitHub under the GPL-3.0 license. It is a 2-layer board measuring 142.7 × 72 mm, with 95 components from 33 distinct parts.
Its main chip is the ATSAMD21G18A-MF, from the Microchip SAM family. Other key parts include the MCP73831T-2ACI/OT, AP2112K-3.3TRG1, MAX9814ETD+T, W25Q32JVZPIQ and SN74LVC1T45DCKT. By type, the board carries 37 capacitors, 25 diodes, 14 resistors, 6 ICs, 4 switches and 3 connectors.
It belongs with the dev boards & breakouts designs in this gallery.
From the project
Slides and Design Files for BSides Canberra 2021
The pcb-ehd files require a recent KiCad Nightly build to open, whereas the SAO can be opened in KiCad 5.
In each of the project folders, you will find the below files:
- proj.kicadpro is the overall KiCad project (.pro for V5). - proj.kicadsch is the schematic (.sch for V5). - proj.kicadpcb is the physical layout. - outputs/schematic.pdf is a PDF of the schematic. - outputs/assembly.html is a "Human Pick and Place" file which will help you hand assemble the board. - outputs/bom.csv` is the bill of materials required to populate the boards. I have not fully specified the resistors and…
Main components on the Blinky Bowtie
Blinky Bowtie bill of materials (BOM)
95 components, 33 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MCP73831T-2ACI/OT MCP73831T-2 Microchip Technology | SOT-23-5 | U1 |
| 1 | ATSAMD21G18A-MF ATSAMD21G18A-M Microchip Tech | QFN-48-1EP_7x7mm_P0.5mm_EP5.15x5.15mm | U2 |
| 1 | AP2112K-3.3TRG1 AP2112K-3.3 Diodes Incorporated | SOT-23-5 | U3 |
| 1 | MAX9814ETD+T MAX9814 Maxim | DFN-14-1EP_3x3mm_P0.4mm_EP1.78x2.35mm | U4 |
| 1 | W25Q32JVZPIQ Winbondn | SOP-8_5.28x5.23mm_P1.27mm | U5 |
| 1 | SN74LVC1T45DCKT SN74LVC1T45DCK Texas Instruments | SOT-363_SC-70-6 | U6 |
| 1 | DMP2045U-7 DMP2045U Diodes Incorporated | SOT-23 | Q1 |
| 1 | TYPE-C-31-M-12n USB_C_Receptacle_USB2.0 Korean Hroparts Elecn | USB_C_Receptacle_HRO_TYPE-C-31-M-12 | J1 |
| 1 | S2B-PH-SM4-TB(LF)(SN) JST_PH JST | JST_PH_S2B-PH-SM4-TB_1x02-1MP_P2.00mm_Horizontal | J2 |
| 1 | SWD | 4_PIN_THT_Staggered | J3 |
| 1 | GAIN | SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP1 |
| 1 | AR | SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP2 |
| 1 | MIC_CMA-4544PF-W Mic CUI Devices | MIC_CMA-4544PF-W | MK1 |
| 3 | B3U-1000P B3U Omron Electronics | SW_SPST_B3U-1000P | SW1, SW2, SW3 |
| 1 | PCM12SMTR SLIDE C&K | SW_SPDT_PCM12 | SW4 |
| 1 | KT-0603R RED Hubei KENTO Elec | LED_0603_1608Metric | D1 |
| 1 | E6C0603SEAC1UDA ORG EKINGLUX | LED_0603_1608Metric | D2 |
| 21 | WS2812B-B WS2812B Worldsemi | LED_WS2812B_PLCC4_5.0x5.0mm_P3.2mm | D3, D6, D7, D8, D9, D10, D11, D12 +13 |
| 1 | 19-217/BHC-ZL1M2RY/3T PWR Everlight Elec | LED_0603_1608Metric | D4 |
| 1 | MBR120ESFT1G MBR120 ON Semiconductor | D_SOD-123FL | D5 |
Show 13 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 2 | BLM15AG601SN1D 600R Murata Electronics | R_0603_1608Metric | FB1, FB2 |
| 1 | 4U7 4u7 | C_0603_1608Metric | C1 |
| 26 | 100N 100n | C_0603_1608Metric | C2, C5, C7, C8, C9, C10, C12, C13 +18 |
| 3 | 10U 10u | C_0603_1608Metric | C3, C4, C6 |
| 5 | 1u | C_0603_1608Metric | C11, C19, C20, C21, C37 |
| 1 | 470N 470n | C_0603_1608Metric | C34 |
| 1 | 2U2 2u2 | C_0603_1608Metric | C35 |
| 3 | 1K | R_0603_1608Metric | R1, R2, R7 |
| 2 | 5K1 | R_0603_1608Metric | R3, R5 |
| 4 | 100K | R_0603_1608Metric | R4, R6, R8, R10 |
| 3 | 10K | R_0603_1608Metric | R9, R13, R14 |
| 1 | 150K | R_0603_1608Metric | R11 |
| 1 | 2K2 | R_0603_1608Metric | R12 |
Blinky Bowtie design files
The KiCad project lives in the joshajohnson/bsidescbr2021 repository on GitHub; these links point at the commit this page was built from.
Blinky Bowtie: common questions
What microcontroller does the Blinky Bowtie use?
The Blinky Bowtie is built around the ATSAMD21G18A-MF, from the Microchip SAM family.
How big is the Blinky Bowtie PCB?
The Blinky Bowtie measures 142.7 × 72 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Blinky Bowtie?
95 components, from 33 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 Blinky Bowtie design files?
From the joshajohnson/bsidescbr2021 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 Blinky Bowtie design in my own project?
Yes, under the terms of its GPL-3.0 license, which joshajohnson chose for the repository.
Can I test firmware for the Blinky Bowtie without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug Microchip SAM firmware against it before you order a PCB.
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