Tools, APP Software Used etc.

KiCad 9.0

Description

Solar panel charger and light control

This board is connected to a solar panel via connector J10. The solar panel voltage is stabilized and, through an LM317 regulator, brought to about 13V to supply a car battery (also connected to connector J10).

When the solar panel voltage drops and it becomes dark, the output on connector J6 is automatically activated (through the BJT Q4 and the N‑channel MOSFET Q5). Conversely, when light returns, the solar panel generates voltage and the output is deactivated.

Optionally, there is also a +5V regulator that allows the management of a +5V output, controlled in the same way as the previous one (output on connector J7)

Schematic and Layout

Schematics

schematico.pdf

Download Gerbers Download BOM(Bill of materials)

May 13,2026

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Solar panel charger and light control

This board allows receiving the voltage from a small solar panel to charge a +12V battery, which turns on a light bulb when it is dark

Published: May 13,2026

Standard PCB

Download Gerber file 1

BOM(Bill of materials)

Centroid file

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