Gravel System

The best resource for tech and electronics projects, tutorials and reviews

Latest Posts

Gweike G2 Pro 30W Fibre Laser Unboxing & Review

Michael Klements - November 13, 2024 0

I've been using diode and CO2 lasers in my home workshop for quite some time. Combined with a 3D printer, they've been fantastic for...

Khadas Mind 2 Unboxing & Review

Michael Klements - October 31, 2024 0

Over the past two years, I've tried two of Khadas' single board computers which were aimed at being compact and low power computers for...

Elegoo Mars 5 Ultra Unboxing and Review

Michael Klements - October 23, 2024 0

The Mars 5 Ultra is the latest revision to Elegoo's successful Mars series of SLA printers. Its product page advertises an impressive set of...

I Built A 4-Bay Raspberry Pi 5 Based NAS

Michael Klements - May 15, 2024 24

Last year, I built a Pi-based NAS as cheaply as possible using a Raspberry Pi Zero 2W. It was a great project to learn...

Multiple Push Buttons on One Arduino Input

Michael Klements - May 17, 2019 29

The most commonly used Arduino board, the Arduino Uno, only has 12 available digital IO pins, so you may find yourself quickly running out...

Recondition a Lead Acid Battery, Don’t Buy A New One

Michael Klements - May 12, 2016 146

Lead acid batteries often die due to an accumulation of lead sulphate crystals on the plates inside the battery, fortunately, you can recondition your...