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Spar Sensor

hpvdt·falcon_wing_module·hardware/spar_sensor/spar_sensor.kicad_pcb

Spar Sensor PCB layout, top view — open source AVR/Arduino board by hpvdt
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About the Spar Sensor PCB

Spar Sensor is an open source AVR/Arduino PCB design by hpvdt, published on GitHub. It is a 2-layer board measuring 40.3 × 15.8 mm, with 25 components from 15 distinct parts.

Its main chip is the TCA6408ARSVR, from the AVR/Arduino family. Other key parts include the TLV70033DCKR. By type, the board carries 11 resistors, 7 capacitors, 2 ICs, 2 transistors, 2 connectors and 1 diode.

It belongs with the sensors designs in this gallery.

From the project

General purpose modules for handling wing duties

The designs for the wing module reside here. The module is an evolution of two separate boards on Falcon: the distributed voltage regulators (servoregulator), and the spar load sensing boards (sparsensor). As such, their design files are included in this repository for reference in addition to the actual wing module design files.

All designs were made in KiCad, version 9.0 as of writing.

Main components on the Spar Sensor

TCA6408ARSVRTLV70033DCKR

Spar Sensor bill of materials (BOM)

25 components, 15 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
TCA6408ARSVR
ATtiny1616-MNR
U1
1
TLV70033DCKR
HX711
U2
1
2N7002KQ-7
Q1
1
MMSS8550
Q2
2
Conn_01x03
J2, J3
1
ORNG
D2
2
CL10B104KA8NNNC
100n
C1, C2
3
100n
C3, C4, C7
2
10u
C5, C6
1
0603WAF4300T5E
5k6
R1
2
0603WAF4300T5E
100
R2, R3
4
0603WAF4300T5E
10k
R4, R5, R6, R7
1
0603WAJ0103T5E
5k6
R8
1
0603WAJ0103T5E
100
R9
2
510
R10, R11

Spar Sensor design files

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

Spar Sensor: common questions

What microcontroller does the Spar Sensor use?

The Spar Sensor is built around the TCA6408ARSVR, from the AVR/Arduino family.

How big is the Spar Sensor PCB?

The Spar Sensor measures 40.3 × 15.8 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Spar Sensor?

25 components, from 15 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 Spar Sensor design files?

From the hpvdt/falcon_wing_module 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 Spar Sensor design in my own project?

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

Can I test firmware for the Spar Sensor 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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