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2 layers41 × 44.5 mmAttic, the printed circuit board in 3D

Minimalist flight-control toolkit for makers

Size
41 × 44.5 mm
Copper layers
2
Thickness
1.6 mm
Parts
13
Nets
39
Pads
69
Tracks, vias
102, 1
Pours
1
Routed
Yes
KiCad
KiCad 10.0 (file 20260206)
Created
31 Dec 2015
Updated
7 Nov 2026

Overview

Attic is an open-source printed circuit board by simondlevy, from the simondlevy/Hackflight repository on GitHub, published under the GPL-3.0 licence. It is a 2-layer board of 41 × 44.5 mm with 13 parts on 39 nets, routed with 102 tracks and 1 via.

Its parts include 7 connectors, 1 resistor and 1 diode.

README

attic/kicad/main/README.md

Secure M2 nylon machine screws

Before soldering on any of the components, you'll need to decide how you're going to mount the PCB to your airframe. I've also used VHB tape, which doesn't require screws, but for a cleaner build the PCB provides four mounting holes in the popular 26x26mm diamond configuration, for use with M2 nylon machine screws. You secure these screws temporarily with nuts before using a rubber grommit for vibration dampening.

BOM, in order of soldering

Note: I recommend using Scotch tape to mask the pins you're not currently soldering, and doing a continuity check for bridges/shorts after each step:

  1. Pololu 5V Step-Up/Step-Down Voltage Regulator S7V7F5, on bottom, using 1-2mm chisel/bevel tip.

  2. 28AWG silicone-insulated wire for hover-deck, protruding from bottom, using 0.2-0.8mm fine/conical tip.

  3. SHUTTLE BOARD 3.0 BMI088, on top, using 0.2-0.8mm fine/conical tip. To avoid soldering a bridge (short circuit), you should solder only the six indicated pins (3V3, GND, SCL0, GD, SDA0, 3V3).

  4. 28AWG silicone-insulated wires to 4-in-1 ESC, protruding from bottom, using 0.2-0.8mm fine/conical tip. Most 4-in-1 ESCs come with this connector, or you can build one yourself using a kit like this.

  5. 220Ω resistor, on bottom, using 1-2mm chisel/bevel tip.

  6. LED, on top, using 1-2mm chisel/bevel tip.

Teensy / ESP32 Xiao C6

https://www.amazon.com/Breakaway-Headers-Connector-Breadboard-Electronic/dp/B0FLJVHSRN/

Parts

13
QtyValueFootprintReferences
4MountingHoleMountingHole:MountingHole_2.5mmH1, H2, H3, H4
1Conn_01x03_SocketConnector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_VerticalJ4
1Conn_01x06Connector_PinSocket_2.00mm:PinSocket_1x06_P2.00mm_VerticalJ5
1Conn_01x07Connector_PinHeader_1.27mm:PinHeader_1x07_P1.27mm_VerticalJ7
1Conn_01x08Connector_PinSocket_2.00mm:PinSocket_1x08_P2.00mm_VerticalJ6
1Conn_01x09Connector_PinHeader_1.27mm:PinHeader_1x09_P1.27mm_VerticalJ8
1Conn_01x14Connector_PinSocket_2.54mm:PinSocket_1x14_P2.54mm_VerticalJ1
1Conn_01x14_SocketConnector_PinSocket_2.54mm:PinSocket_1x14_P2.54mm_VerticalJ2
1LEDLED_THT:LED_D3.0mm_FlatTopD1
1RResistor_THT:R_Axial_DIN0204_L3.6mm_D1.6mm_P7.62mm_HorizontalR1

Questions

How big is the Attic PCB?

It measures 41 × 44.5 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Attic use?

13 parts. 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 Attic KiCad files?

From the simondlevy/Hackflight repository on GitHub, at the commit this page was made from: the board is attic/kicad/main/main.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Attic 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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