Who's behind it
I'm Liam, based in Australia. I worked as an electronics technician for a number of years before moving into other work, and these days Raspberry Pi and Arduino projects are a weekend hobby rather than a job.
That background is why this site exists, and it's also why I'll be upfront about its limits: I'm not currently working in the trade, and hobby electronics moves along. The fundamentals — voltage, current, why a resistor goes there, what kills a GPIO pin — don't change, and that's what most of these guides are about. Where an article makes a specific claim about a current product or specification, I check it against a primary source rather than trusting memory.
Why the site exists
Search for almost any beginner electronics question and you'll find a hundred articles that restate a spec sheet without ever having wired the thing up. They'll tell you an HC-SR04 is an ultrasonic distance sensor. They won't mention that its Echo pin will slowly cook your Raspberry Pi's input unless you do something about it.
The goal here is the second kind of information: what actually goes wrong, why, and what to do instead. Fewer articles, each one more useful.
What's here
- PinTinker — a free tool that takes the sensors and modules in your project and works out which GPIO pins to use, flagging bus conflicts and voltage problems before you wire anything. It runs entirely in your browser; nothing is uploaded or stored.
- Guides — practical write-ups on wiring, power, components, and the mistakes that cause dead boards.
How things are checked
Technical claims — current limits, voltages, resistor values, power requirements — are checked against manufacturer documentation or datasheets rather than other blogs. Where a figure is a typical value rather than an absolute one, the article says so, because "typical" and "guaranteed" are very different things when you're the one holding the soldering iron.
If you spot something wrong, please tell me. Corrections are genuinely welcome — I'd rather fix an article than defend it.
How it's paid for
The site may carry advertising and some product links are affiliate links, which cost you nothing extra. Nothing is recommended because it pays more, and the buying guides deliberately include what not to buy. Full details on the affiliate disclosure and privacy pages.
A safety note
Everything here assumes low-voltage hobby electronics — battery packs, USB supplies, 3.3V and 5V logic. Mains voltage is a different discipline with different risks, and if a project of yours involves it, please get advice from someone qualified to give it. Nothing on this site is a substitute for the safety instructions that came with your equipment.