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Circuit Breaker

Circuit protection, fuses, polyfuses, and keeping your electronics safe.

19 posts

I've Killed at Least 11 L293D Motor Drivers. Here's What I Learnt.

I started counting at some point: eleven L293D motor driver ICs, three L298N modules, and one ATmega328P that I'm still not sure how I managed to kill. A checklist of what actually destroys motor drivers.

8 Apr 2026Read

Circuit Breaker6 min read

Learning Electronics When You Don't Have a Mentor

YouTube tutorials will get you to blinking LEDs and reading sensor values. There's a gap between that and building something that actually works reliably, and almost no one talks about what's in that gap.

18 Mar 2026Read

Circuit Breaker8 min read

Debugging Electronics Projects Like a Detective — A Framework That Actually Works

After years of watching beginners (and myself) flail at broken circuits, I developed a debugging protocol that eliminates the randomness.

22 Apr 2026Read

Circuit Breaker6 min read

How to Actually Read a Datasheet Without Getting Overwhelmed

Most makers never read datasheets because they don't know how to start. This guide teaches the specific parts you need, in the order you need them.

18 Mar 2026Read

Circuit Breaker7 min read

I2C vs SPI vs UART — Which One Should You Actually Use?

Three common serial protocols, three different trade-offs. Here's a practical guide that goes beyond the textbook comparison.

9 Mar 2026Read

Circuit Breaker6 min read

Five Power Supply Mistakes I See in Almost Every Beginner Circuit

Your microcontroller is fine. Your sensors are fine. Your code is probably fine. What's usually wrong is the power supply design.

2 Apr 2026Read

Circuit Breaker7 min read

Voltage Dividers — The Circuit Everyone Uses and Most People Get Wrong

The voltage divider is probably the most commonly drawn circuit in hobbyist electronics. It's also one of the most commonly misapplied. Not because the formula is wrong — it's correct — but because the formula doesn't tell you the whole story.

29 Apr 2026Read

Circuit Breaker6 min read

Decoupling Capacitors — Why Every IC Gets One and What Happens If You Skip It

You've seen it in every reference schematic: a 100nF capacitor right next to the power pins of every IC. You've probably copied it without fully understanding why. Here's what it's actually doing.

1 May 2026Read

Circuit Breaker7 min read

Ground Planes — The Invisible Part of PCB Design That Makes Everything Else Work

You route all the signal traces, connect all the power rails, and the board works — but the ADC readings are noisy, the radio range is shorter than expected, and there's a faint 50Hz hum on anything sensitive. The schematic is correct. The issue is the ground.

9 May 2026Read

Showing 1–9 of 19 posts