P3
About the P3 PCB
P3 is an open source AVR/Arduino PCB design by larsimmisch, published on GitHub. It is a 2-layer board measuring 86.4 × 45.7 mm, with 26 components from 23 distinct parts.
Its main chip is the ATmega328-AU, from the AVR/Arduino family. Other key parts include the PGA2310 and MAX6100. By type, the board carries 13 connectors, 5 capacitors, 3 ICs, 3 resistors, 1 crystal and 1 switch.
Main components on the P3
P3 bill of materials (BOM)
26 components, 23 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | PGA2310 | SOIC-16_3.9x9.9mm_P1.27mm | U1 |
| 1 | ATmega328-AU | TQFP-32_7x7mm_P0.8mm | U3 |
| 1 | MAX6100 | SOT-23 | U4 |
| 1 | Crystal | Crystal_HC18-U_Vertical | Y1 |
| 1 | 12v | PinSocket_1x03_P2.54mm_Vertical | J1 |
| 1 | Channels | PinSocket_2x05_P2.54mm_Vertical | J2 |
| 1 | Noritake | PinSocket_2x05_P2.54mm_Vertical | J3 |
| 1 | POWER | PinSocket_2x05_P2.54mm_Vertical | J4 |
| 1 | Q | PinSocket_1x04_P2.54mm_Vertical | J5 |
| 1 | PGM | PinSocket_1x06_P2.54mm_Vertical | J7 |
| 1 | AVR-ISP-6 | PinSocket_2x03_P2.54mm_Vertical | J8 |
| 1 | PWR1 | PinSocket_1x02_P2.54mm_Vertical | J9 |
| 1 | PWR2 | PinSocket_1x02_P2.54mm_Vertical | J10 |
| 1 | inl | PinSocket_1x02_P2.54mm_Vertical | J13 |
| 1 | inr | PinSocket_1x02_P2.54mm_Vertical | J14 |
| 1 | outl | PinSocket_1x02_P2.54mm_Vertical | J15 |
| 1 | outr | PinSocket_1x02_P2.54mm_Vertical | J16 |
| 1 | SW_DIP_x01 | SW_SPST_B3S-1000 | SW1 |
| 2 | 22pF | C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C1, C2 |
| 2 | 100nF | C_0603_1608Metric_Pad1.05x0.95mm_HandSolder | C3, C5 |
Show 3 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 1u | C_Rect_L4.6mm_W3.0mm_P2.50mm_MKS02_FKP02 | C4 |
| 1 | 10k | R_0603_1608Metric | R1 |
| 2 | 4k7 | R_0603_1608Metric | R2, R3 |
P3 design files
The KiCad project lives in the larsimmisch/lci-kicad repository on GitHub; these links point at the commit this page was built from.
- LayoutP3/P3.kicad_pcb
P3: common questions
What microcontroller does the P3 use?
The P3 is built around the ATmega328-AU, from the AVR/Arduino family.
How big is the P3 PCB?
The P3 measures 86.4 × 45.7 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the P3?
26 components, from 23 distinct parts. The full bill of materials is listed on this page.
Where can I download the P3 design files?
From the larsimmisch/lci-kicad repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the P3 design in my own project?
The repository has no license, so all rights stay with larsimmisch. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the P3 without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug AVR/Arduino firmware against it before you order a PCB.
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