2 layers363.7 × 103.4 mm
Xfm2-ui board
bendecaf/xfm2-pcbs
PCBs for the excellent FPGA synth projects XFM2 and XVA1.
95 parts22GPL-3.0
2 layers
Exacto
Agrabski/exactoRust project for the Arduino Nano, powering a reflex sight for airsoft guns with an integrated ballistic computer.
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 8
- Nets
- 94
- Pads
- 126
- Tracks, vias
- 55, 10
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 10 Jun 2025
- Updated
- 19 Aug 2026
Overview
Exacto is an open-source printed circuit board by Agrabski, from the Agrabski/exacto repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board with 8 parts on 94 nets, routed with 55 tracks and 10 vias.
It is built around the ATMEGA2560-16AU. Its parts include 2 connectors and 1 IC. It belongs with the AVR (ATmega, ATtiny) boards of this library.
Main components
1README
README.mdExacto
Rust project for the Arduino Nano, powering a reflex sight for airsoft guns with an integrated ballistic computer.
Build Instructions
-
Install prerequisites as described in the
avr-halREADME (avr-gcc,avr-libc,avrdude,ravedude). -
Run
cargo buildto build the firmware. -
Run
cargo runto flash the firmware to a connected board. Ifravedudefails to detect your board, check its documentation at https://crates.io/crates/ravedude. -
ravedudewill open a console session after flashing where you can interact with the UART console of your board.
License
Licensed under the GNU General Public License, Version 3 or (at your option) any later version (LICENSE or https://www.gnu.org/licenses/gpl-3.0.html).
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you shall be licensed under the GPL-3.0 license, without any additional terms or conditions.
Parts
8| Qty | Value | Footprint | References |
|---|---|---|---|
| 1 | ATmega2560-16A | Package_QFP:TQFP-100_14x14mm_P0.5mm | U1 |
| 1 | Battery | Connector:JWT_A3963_1x02_P3.96mm_Vertical | BT1 |
| 1 | CTRL BTNS | Connector_JST:JST_EH_S4B-EH_1x04_P2.50mm_Horizontal | J1 |
| 1 | DISPLAY | Connector_JST:JST_EH_S8B-EH_1x08_P2.50mm_Horizontal | J2 |
The 4 most common of 8 parts.
Questions
What parts does the Exacto use?
8 parts, built around the ATMEGA2560-16AU. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Exacto KiCad files?
From the Agrabski/exacto repository on GitHub, at the commit this page was made from: the board is hardware/pcb/electronics/electronics.kicad_pcb and its schematic hardware/pcb/electronics/electronics.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Exacto design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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