Hidden Gems: Lesser-known but surprisingly useful components — share yours!

[Kieu Vu]

Hi everyone! I'm fairly new to electronics and have been trying to keep up with what's out there beyond the usual Arduino shields and common ICs.

While browsing datasheets and project blogs lately, I keep stumbling across components that don't get much attention — but turn out to be really clever or useful once you dig into them.

For example, I recently came across:

• CH32V003 — a tiny RISC-V MCU that costs almost nothing but has surprisingly capable peripherals
• TP4056 — a dead-simple 1-cell LiPo charger IC that's perfect for small battery projects
• WS2812B "smart" LEDs — addressable RGB LEDs with built-in drivers, great for beginners

But I'm sure experienced folks here know about far more interesting ones I've never heard of!

So my questions are:

• What's a lesser-known component you've discovered that genuinely surprised you?
• What problem does it solve, and where would a beginner realistically use it?
• Any tips on where to find or buy it?

Let's build a list that could help beginners like me find useful parts they'd never think to search for. All skill levels welcome — even if it's "obvious" to you, it might be new to someone else!

Thanks in advance

 

[Harald Kapp]

components that don't get much attention

WS2812B LEDs definitely do not belong to this class. They come in millions on addressable LED strips or in different form as Neopixels.