Samd51 gps alarm clock
About the Samd51 gps alarm clock PCB
Samd51 gps alarm clock is an open source Microchip SAM PCB design by KrHaaland, published on GitHub. It is a 2-layer board measuring 80 × 50 mm, with 149 components from 43 distinct parts.
Its main chip is the ATSAMD51J19A-AUT, from the Microchip SAM family. Other key parts include the TPA2016D2RTJR, PRTR5V0U2X_C2827688, L86-M33, RV-3028-C7 and 24LC512. By type, the board carries 62 resistors, 34 LEDs, 26 capacitors, 14 ICs, 5 connectors and 4 switches.
It belongs with the rf & radio and power & battery designs in this gallery.
From the project
GNSS-synchronized alarm clock — custom SAMD51J20A board with nPM1300 Li-ion power (USB-C), offline timezone+DST from coordinates, LVGL 9 on a 428x142 TFT, WAV alarm tunes over USB, battery-backed RTC
Firmware for the custom SAMD51 alarm-clock board (Adafruit Metro M4 compatible), designed in HARDWARE/ (KiCad). Two board revisions share one firmware:
- v2 (current) — SAMD51J20A, nPM1300 PMIC with Li-ion charging and USB-C, LM3671 3.3 V + TPS61023 5 V boost, battery-backed RTC, MCU core on its internal buck regulator. See HARDWAREV2.md and ADR-0014/0015. Default build: metrom4j20. - v1 (prototype) — SAMD51J19A, LTC3226 + supercaps (design in HARDWAREOLD/). Build: adafruitmetrom4. The firmware detects the PMIC at runtime and degrades gracefully either way.
Main components on the Samd51 gps alarm clock
Samd51 gps alarm clock bill of materials (BOM)
149 components, 43 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TPA2016D2RTJR | TPA2016D2 | U1 |
| 1 | PRTR5V0U2X_C2827688 | PRTR5V0U2X | U2 |
| 1 | L86-M33 | L86-M33 | U4 |
| 1 | RV-3028-C7 | RV-3028-C7 | U5 |
| 1 | 24LC512 | SOIC-8_3.9x4.9mm_P1.27mm | U6 |
| 1 | LIS3DH | LGA-16_3x3mm_P0.5mm_LayoutBorder3x5y | U7 |
| 1 | MX25L3233FM1 | SOP-8_3.9x4.9mm_P1.27mm | U8 |
| 4 | IRLML6344TRPBF | IRLML6344 | U10, U11, U12, U13 |
| 1 | LM3671MFX-3.3/NOPB | LM3671MFX-3.3 | U14 |
| 1 | LTC3226EUD-PBF | LTC3226 | U15 |
| 1 | ATSAMD51J19A-AUT | ATSAMD51J19_TQFP | U18 |
| 1 | 32.768 | Q13FC13500005 | X1 |
| 1 | USB4110GFA | USB4110-GF-A | J1 |
| 1 | CONN_ARM_JTAG_SWD_10 Conn_ARM_JTAG_SWD_10 | PinHeader_2x05_P1.27mm_Vertical | J2 |
| 1 | B7B-XH-A | B7B-XH-A | J3 |
| 2 | B2B-PH-K-S | B2B-PH-K-S | J5, J6 |
| 4 | TS-1187A-B-A-B | TS-1187A-B-A-B | SW1, SW2, SW3, SW4 |
| 34 | OR-PL020W | OR-PL020W | LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8 +26 |
| 1 | US1M | D_SMA | D3 |
| 1 | 2.2UH 2.2uH | VLCF4020T-2R2N1R7 | L1 |
Show 23 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 10UH 10uH | L_1008_2520Metric | L4 |
| 3 | 1UF 1uF | C_0805_2012Metric | C2, C26, C30 |
| 12 | 10UF 10uF | C_0805_2012Metric | C6, C7, C8, C9, C10, C11, C16, C17 +4 |
| 4 | C_Polarized | CP_Radial_D6.3mm_P2.50mm | C12, C13, C14, C15 |
| 1 | 220UF 220uF | CP_Elec_6.3x5.7 | C18 |
| 1 | 2.2UF 2.2uF | C_0805_2012Metric | C22 |
| 1 | 4.7UF 4.7uF | C_0805_2012Metric | C23 |
| 2 | 10PF 10pF | C_0805_2012Metric | C24, C25 |
| 1 | 100NF 100nF | C_0805_2012Metric | C27 |
| 1 | C52923 10μF | C_0805_2012Metric | C29 |
| 5 | 1M | R_0805_2012Metric | R1, R8, R9, R10, R11 |
| 2 | 5100Ω | R_0805_2012Metric | R2, R3 |
| 2 | 4.7K | R_0805_2012Metric | R6, R7 |
| 1 | 100K 100k | R_0805_2012Metric | R13 |
| 1 | 33kΩ | R_0805_2012Metric | R14 |
| 4 | 470Ω | R_0805_2012Metric | R15, R54, R56, R59 |
| 8 | 10kΩ | R_0805_2012Metric | R18, R55, R57, R58, R60, R63, R65, R68 |
| 34 | 80Ω | R_0805_2012Metric | R20, R21, R22, R23, R24, R25, R26, R27 +26 |
| 1 | 1MΩ | R_0805_2012Metric | R61 |
| 1 | 300kΩ | R_0805_2012Metric | R62 |
| 1 | 0Ω | R_1206_3216Metric_Pad1.30x1.75mm_HandSolder | R64 |
| 1 | 1kΩ | R_0805_2012Metric | R66 |
| 1 | 100KΩ | R_0805_2012Metric | R67 |
Samd51 gps alarm clock design files
The KiCad project lives in the KrHaaland/GNSS_Alarm_Clock repository on GitHub; these links point at the commit this page was built from.
Samd51 gps alarm clock: common questions
What microcontroller does the Samd51 gps alarm clock use?
The Samd51 gps alarm clock is built around the ATSAMD51J19A-AUT, from the Microchip SAM family.
How big is the Samd51 gps alarm clock PCB?
The Samd51 gps alarm clock measures 80 × 50 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Samd51 gps alarm clock?
149 components, from 43 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 Samd51 gps alarm clock design files?
From the KrHaaland/GNSS_Alarm_Clock 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 Samd51 gps alarm clock design in my own project?
The repository has no license, so all rights stay with KrHaaland. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Samd51 gps alarm clock 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.
More boards in GNSS_Alarm_Clock
Similar boards
Microchip SAMFpgaboy
Wren6991
50 × 50 mm89 parts4LNo license508
Microchip SAMKira
kiibohd
366.9 × 114.3 mm400 partsCERN-OHL-1.2415
Microchip SAMDSKY driver
benkrasnow
43 × 92.3 mm44 partsMIT258
Microchip SAMDuet 2 Maestro
Duet3D
100 × 123 mm336 partsCERN-OHL-1.2257
Microchip SAMMainboard
pycubed
90.2 × 95.9 mm196 parts2LNo license96
Microchip SAMTiny4FSK
New-England-Weather-Balloon-Society
35.1 × 76.3 mm80 parts4LCERN-OHL-W-2.095