Hermes
About the Hermes PCB
Hermes is an open source Microchip SAM PCB design by 1337bowen, published on GitHub under the MIT license. It is a 4-layer board measuring 50 × 80 mm, with 69 components from 50 distinct parts.
Its main chip is the ATSAMD21G18A-MUT, from the Microchip SAM family. Other key parts include the AP63205WU-7, IS25LP064A-JBLE, AZ1117-3.3, BMI088 and BMP280. By type, the board carries 19 capacitors, 16 connectors, 15 resistors, 6 ICs, 4 diodes and 3 transistors.
Main components on the Hermes
Hermes bill of materials (BOM)
69 components, 50 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ATSAMD21G18A-MUT | ATSAMD21G18A-MUT | IC1 |
| 1 | AP63205WU-7 | TSOT-23-6 | IC2 |
| 1 | IS25LP064A-JBLE | SOIC127P790X216-8N | IC3 |
| 1 | AZ1117-3.3 | SOT-223 | U1 |
| 1 | BMI088 | BMI088 | U2 |
| 1 | BMP280 | LGA-8_2x2.5mm_BMP280 | U3 |
| 3 | — | SOT-23-3 | Q1, Q2, Q3 |
| 1 | 32.768KHz | CRYSTAL_ECS | Y1 |
| 1 | TVCY | PinHeader_1x03_P2.54mm_Vertical | J1 |
| 1 | TVCZ | PinHeader_1x03_P2.54mm_Vertical | J2 |
| 1 | FANZ | PinHeader_1x03_P2.54mm_Vertical | J3 |
| 1 | FANY | PinHeader_1x03_P2.54mm_Vertical | J4 |
| 1 | 10118194-0001LF | AMPHENOL_10118194-0001LF | J5 |
| 1 | I2C | 0532617004 | J6 |
| 1 | UART | 0532617004 | J7 |
| 1 | 5V OUT | TerminalBlock_4Ucon_1x02_P3.50mm_Vertical | J8 |
| 1 | 3V3 OUT | TerminalBlock_4Ucon_1x02_P3.50mm_Vertical | J9 |
| 1 | SWD | PinHeader_2x05_P1.27mm_Vertical_SMD | J10 |
| 1 | BATT IN | TerminalBlock_4Ucon_1x02_P3.50mm_Vertical | J11 |
| 1 | BATT SW BY | TerminalBlock_4Ucon_1x02_P3.50mm_Vertical | J12 |
Show 30 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | DM3D-SF | HRS_DM3D-SF | J14 |
| 1 | PYRO1 | TerminalBlock_4Ucon_1x02_P3.50mm_Vertical | J15 |
| 1 | PYRO2 | TerminalBlock_4Ucon_1x02_P3.50mm_Vertical | J16 |
| 1 | PYRO3 | TerminalBlock_4Ucon_1x02_P3.50mm_Vertical | J17 |
| 1 | 500 mA | Fuse_0805_2012Metric | F1 |
| 1 | PTS_647_SK38_SMTR2_LFS | PTS647SK38SMTR2LFS | S1 |
| 1 | BATT SW | JS202011SCQN | S2 |
| 1 | USBLC6-2SC6Y | SOT23-6L | D1 |
| 1 | B5817WS-TP | D_SOD-323 | D2 |
| 1 | LED | LED_0805_2012Metric_Pad1.15x1.40mm_HandSolder | D3 |
| 1 | LED_RGB | 150352M173300 | D4 |
| 1 | 100 @ 100MHz | L_0603_1608Metric | FB1 |
| 1 | 4.7uH | IND_ECS-MPI4040R2-4R7-R | L1 |
| 2 | 0.1u | C_0805_2012Metric | C1, C6 |
| 9 | 0.1u | C_0603_1608Metric | C2, C5, C9, C10, C14, C15, C16, C17 +1 |
| 2 | 22p | C_0603_1608Metric | C3, C4 |
| 1 | 47u | C_1206_3216Metric | C7 |
| 2 | 10u | C_0805_2012Metric | C8, C19 |
| 1 | 10n | C_0603_1608Metric | C11 |
| 2 | 1u | C_0805_2012Metric | C12, C13 |
| 1 | 1.5k | R_0603_1608Metric | R1 |
| 1 | 330 | R_0603_1608Metric | R2 |
| 1 | 200k | R_0603_1608Metric | R3 |
| 1 | 100k | R_0603_1608Metric | R4 |
| 2 | 4.7k | R_0603_1608Metric | R5, R7 |
| 1 | 68 | R_0603_1608Metric | R6 |
| 2 | 5.6 | R_0603_1608Metric | R8, R9 |
| 1 | 0.4 | PWR163S25R400FE | R10 |
| 1 | 10k | R_0603_1608Metric | R11 |
| 4 | 470 | R_0603_1608Metric | R12, R13, R14, R15 |
Hermes design files
The KiCad project lives in the 1337bowen/Strife repository on GitHub; these links point at the commit this page was built from.
Hermes: common questions
What microcontroller does the Hermes use?
The Hermes is built around the ATSAMD21G18A-MUT, from the Microchip SAM family.
How big is the Hermes PCB?
The Hermes measures 50 × 80 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Hermes?
69 components, from 50 distinct parts. The full bill of materials is listed on this page.
Where can I download the Hermes design files?
From the 1337bowen/Strife repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Hermes design in my own project?
Yes, under the terms of its MIT license, which 1337bowen chose for the repository.
Can I test firmware for the Hermes 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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