HardLabs

Autopilot

ieb·autopilot·hardware/actuator-board/actuator-board.kicad_pcb

Autopilot PCB layout, top view — open source AVR/Arduino board by ieb

About the Autopilot PCB

Autopilot is an open source AVR/Arduino PCB design by ieb, published on GitHub. It is a 2-layer board measuring 64 × 78 mm, with 33 components from 23 distinct parts.

Its main chip is the ATtiny3224-SS, from the AVR/Arduino family. Other key parts include the AMS1117-3.3. By type, the board carries 12 resistors, 6 connectors, 5 capacitors, 4 diodes, 3 transistors and 2 ICs.

From the project

An ML Autopilot designed and written almost entirely by Google AntiGravity.

- Rudder position from pot and ADC - HBridge Rgiving the ram - INS 219 current sensor - 2x PWM HBridge drive - ElectroMagnetic Clutch using Mosfet - Serial interface to Raspberry Pi - Motor current monitoring - Voltage monitoring

Open actuator-board.kicadsch` in KiCad 9 for the full schematic with design notes.

Unfortunately Cursor failed to create a viable schematic, loads of halucinations, pins that didnt exist, and although KiCad files are text, all it did was copy text into the file which displayed as text. Models tried Gemini 3 adn Claud Opus 4.5. Neither produced a viable design.

Main components on the Autopilot

ATtiny3224-SSAMS1117-3.3

Autopilot bill of materials (BOM)

33 components, 23 distinct parts.

QtyPartRefs
1
ATtiny3224-SS
U2
1
AMS1117-3.3
U3
1
IRF540N
Q1
1
BTN7960TA
Q2
1
BTN7960
Q3
1
RudderSense
J1
1
12V
J2
1
Motor
J3
1
UDPI
J4
1
Clutch
J5
1
SerialToPi
J7
1
30A
F2
1
SS34
D1
2
US1J
D2, D3
1
LED
D4
1
100nF
C1
2
10uF
C2, C4
2
470nF
C3, C5
1
470R
R1
1
100R
R2
Show 3 more
QtyPartRefs
1
4K7
R3
5
1K
R4, R5, R6, R9, R12
4
10K
R7, R8, R10, R11

Autopilot design files

The KiCad project lives in the ieb/autopilot repository on GitHub; these links point at the commit this page was built from.

Autopilot: common questions

What microcontroller does the Autopilot use?

The Autopilot is built around the ATtiny3224-SS, from the AVR/Arduino family.

How big is the Autopilot PCB?

The Autopilot measures 64 × 78 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Autopilot?

33 components, from 23 distinct parts. The full bill of materials is listed on this page.

Where can I download the Autopilot design files?

From the ieb/autopilot repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the Autopilot design in my own project?

The repository has no license, so all rights stay with ieb. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the Autopilot 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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