MCU vs MPU: Which Is Right for Your Product?

Published on by John Teel

Microcontroller or microprocessor. I’ve worked with hundreds of product creators, and this is one of the most expensive decisions people get wrong. We’re talking six months of wasted development and tens of thousands of dollars, because the fix usually means … read more

Every Major MCU Family Ranked Worst to Best

Published on by John Teel

The wrong microcontroller family won’t just slow you down, it can trap you in a dead-end architecture that forces a complete redesign right when you’re ready to scale.

In this video I’m going to rank every major MCU family, from … read more

10 Components You Should NEVER Use in a Product

Published on by John Teel

These 10 components show up in almost every tutorial, dev kit, and prototype out there.

But if you design any of them into a product you plan to manufacture and sell, you could be looking at failed certifications, unreliable products, … read more

7 Microcontrollers You Should NEVER Use in a Product

Published on by John Teel

Choosing the wrong microcontroller can lock you into months of rework, destroy your margins, or leave you completely stranded when the manufacturer moves on.

And after reviewing hundreds of hardware designs, I keep seeing the same 7 MCUs show up … read more

You Build While AI Agents Do the Marketing You Avoid

Published on by John Teel

Over the past few weeks I’ve gone deep on AI agents for my own business, and it’s completely changed how I think about marketing.

I built a content distribution system where I can focus all my energy on creating one … read more

Dev Kit → Module → Bare Chip: When to Move On

Published on by John Teel

There are three stages that virtually every hardware product moves through, from early concept all the way to optimized production.

Most founders either skip one of these stages entirely or get stuck in one way too long, and both mistakes … read more

Why Hardware Founders Win in 2026

Published on by John Teel

You’ve heard it a thousand times, hardware is hard.

It’s the unofficial motto of hardware founders.

But that phrase is no longer a warning, it’s your biggest advantage.

It’s hard not to be jealous sometimes.

You’re stuck waiting on prototypes, … read more

Top 7 Microcontrollers for Battery Life in 2026

Published on by John Teel

Picking a low-power microcontroller that gives you maximum battery life sounds simple.

Just pick the one with the lowest power consumption, right?

Well, there’s a lot more to it.

You have to consider sleep current, active efficiency, minimum voltage, wake-up … read more

Top 12 Electronics That Fail Compliance Testing

Published on by John Teel

You’ve spent months developing your product, maybe even years, and you’re finally ready to get it certified so you can sell it.

Then you send it off for compliance testing and it fails, sometimes badly.

Now you’re looking at a … read more

10 Reasons New Hardware Products Fail

Published on by John Teel

Most people assume hardware products fail because the engineering wasn’t good enough.

But that’s not what kills most hardware products.

What actually sinks them are a handful of business decisions that felt totally reasonable at the time.

Founders make these … read more

Top 10 MCU Selection Mistakes That Cost You in the LONG RUN

Published on by John Teel


A lot of hardware products fail because one early decision pushed everything else in the wrong direction.

In my experience, the one decision that causes the most consequences is choosing the microcontroller.

Once that part is locked in, everything … read more

10 Traps That Stall Hardware Products Before Launch

Published on by John Teel


You’ve spent months, maybe even years, working on your product. You’ve poured in time, money and way more effort than most people will ever realize.

But right when you’re about to launch, everything seems to come to a standstill. … read more

Fastest Microcontroller (MCU) vs Cheapest Microprocessor (MPU)

Published on by John Teel


Most people think microcontrollers are simple, cheap, and slow… and microprocessors are complex, expensive, and fast.

In this video I’m flipping that upside down. Because I’m comparing a two-dollar Linux chip against a twenty-dollar microcontroller that’s literally twice as … read more

10 PCB Design Mistakes That Cause Thermal Failures

Published on by John Teel


Thermal issues are one of the biggest killers of electronic products.

Heat degrades components, shortens product lifespan, and can even create dangerous fire situations.

So in this video, I’ll show you 10 common PCB design mistakes that cause thermal … read more

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