Sqrt of g
About the Sqrt of g PCB
Sqrt of g is an open source PCB design by polygnomial, published on GitHub. It is a 4-layer board measuring 90.2 × 95.9 mm, with 62 components from 31 distinct parts.
Other key parts include the TPS7A4501DCQT, C1351581, C72066, C666272 and C2677390. By type, the board carries 21 resistors, 13 capacitors, 12 connectors, 10 transistors and 6 ICs.
From the project
- Power Architecture - RT1170 and RT1060 pin map - slides and other notes - Tim's review - TODO move other notes here
- Power Architecture - RT1170 and RT1060 pin map - slides and other notes - Tim's review - TODO move other notes here
CPU (RT1170) + RAM (MRAM - SEMC and xSPI) + power breakout board, with 2x 100-pin board to board connectors.
Eventual functional ADCS controller and sensor mainboard that the CPU board will sit on top of
Development breakout board that breaks out all the pins of the RT1170 CPU
Main components on the Sqrt of g
Sqrt of g bill of materials (BOM)
62 components, 31 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | TPS7A4501DCQT | TPS7A4501DCQT | U1 |
| 1 | C1351581 LORA1281F27 | LORA128XF27 | U6 |
| 1 | C72066 Orion B16 | S1216_24PIN_PACKAGE | U7 |
| 1 | C72066 EP2W+ | QFN32-5X5MM | U8 |
| 1 | C666272 ~ | RM3100CB | U9 |
| 1 | C2677390 ~ | RM3100CB | U10 |
| 5 | IRLML2803 | SOT-23 | Q1, Q4, Q6, Q8, Q10 |
| 5 | NDS8434 | NDS8434 | Q2, Q5, Q7, Q9, Q11 |
| 1 | C319148 5055680431 | CON_5055680431 | J1 |
| 1 | 353620650 5055680431 | CON_5055680431 | J2 |
| 1 | C180221 5055680431 | CON_5055680431 | J3 |
| 1 | 353620650 5055680631 | CON_5055680631 | J4 |
| 1 | CONN_01X06 CLP-105-02-X-D | SAMTEC_CLP-105-02-X-D | J5 |
| 2 | DF40HC(3.0)-100DS-0.4V(51) DF40HC_3.0_-100DS-0.4V_51_ | DF40HC30100DS04V51 | J6, J7 |
| 3 | 901-144 Amphenol_901-144 | SMA_Amphenol_901-144_Vertical | J8, J9, J13 |
| 1 | 5055680431 | CON_5055680431 | J11 |
| 1 | 5055680631 | CON_5055680631 | J12 |
| 2 | 1UF 10uF | C_0402_1005Metric | C1, C2 |
| 1 | 1UF 10nF | C_0402_1005Metric | C3 |
| 2 | 22UF 4.7uF | C_0402_1005Metric | C4, C16 |
Show 11 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 10PF 10nF | C_0402_1005Metric | C5 |
| 1 | 4.7UF 4.7uF | C_0402_1005Metric | C6 |
| 1 | 0.1UF 0.1uF | C_0402_1005Metric | C10 |
| 3 | 10nF | C_0402_1005Metric | C13, C15, C17 |
| 1 | 0.22UF 4.7uF | C_0402_1005Metric | C14 |
| 1 | 8PF 4.7uF | C_0402_1005Metric | C18 |
| 1 | C5116354 10k | R_0402_1005Metric | R1 |
| 9 | 10K | R_0402_1005Metric | R2, R4, R6, R8, R11, R22, R23, R26 +1 |
| 6 | 3.3k | R_0402_1005Metric | R3, R7, R10, R25, R28, R31 |
| 4 | 4.7K | R_0402_1005Metric | R5, R9, R24, R30 |
| 1 | C208856 4.7K | R_0402_1005Metric | R27 |
Sqrt of g design files
The KiCad project lives in the polygnomial/adcs repository on GitHub; these links point at the commit this page was built from.
Sqrt of g: common questions
How big is the Sqrt of g PCB?
The Sqrt of g measures 90.2 × 95.9 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the Sqrt of g?
62 components, from 31 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 Sqrt of g design files?
From the polygnomial/adcs 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 Sqrt of g design in my own project?
The repository has no license, so all rights stay with polygnomial. Use it as a reference, and ask the author before reusing the design.
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