Solar-Powered Dashboard Compass

brooks

brooks

make me a solar powered compass that'll sit on my FJ's dashboard. it'll use three 7 segment displays to read out the direction.

flux

I’ll build the schematic for a solar-powered dashboard compass: rename/document the project, choose a low-power MCU + magnetometer + 3-digit 7-segment display architecture, size the solar/battery power path, wire the circuit, then run checks.

flux

I found the library parts and chose three individual 0.67 in 7-segment displays because there isn’t an exact 3-digit part available. I’m using a low-power ATmega328PB, LIS3MDL magnetometer, TM1637 LED driver, MCP73871 solar/LiPo charger, and 3.3 V ultra-low-IQ regulator.

flux

Schematic is complete for the solar-powered FJ dashboard compass: solar/LiPo power path, 3.3 V rail, ATmega328PB, LIS3MDL compass sensor, TM1637 driver, and three individual 7-segment displays are wired.
I created supporting files: Power Analysis and Firmware Starter. Electrical/passive review is clean; remaining full-review issues are expected pre-layout airwires and generic passive MPN placeholders.
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FJ Solar Compass Display thumbnail
Solar-powered dashboard compass for an FJ with a 3-digit seven-segment direction display, magnetometer sensing, low-power MCU control, rechargeable battery storage, and solar charging.

Properties

Properties describe core aspects of the project.

Pricing & Availability

Distributor

Qty 1

Arrow

$1.47–$1.57

Digi-Key

$13.32–$13.87

HQonline

$2.20

LCSC

$10.09–$19.40

Mouser

$14.05

TME

$11.73

Verical

$1.56–$17.52

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