10 Hidden Costs To Scaling Up Your Hardware Product

Published on by John Teel


Scaling up an electronic product is where reality really sets in.

Prototyping is fun and exciting, because you get something working and it feels like real progress.

But once you try to move from a handful of units to … read more

12 Tests That Reveal If Your Product Will FAIL

Published on by John Teel


When your product works perfectly on your bench, it’s easy to assume it’ll keep working once people start using it.

But unless you actually test for reliability, you’re making a pretty risky assumption.

A working prototype doesn’t tell you … read more

Top 5 Most Powerful Microcontrollers in 2026

Published on by John Teel


You don’t always need a full-blown microprocessor to build something advanced.

Some of today’s microcontrollers are insanely powerful.

Fast enough to handle AI, high-end graphics, streaming audio, but still simple enough to run bare-metal code.

And when I say … read more

How Long It Really Takes to Certify Your Product

Published on by John Teel


Certification of a new electronic product feels overwhelming.

It’s expensive, it’s confusing, and it has the power to stall your launch for months.

Most entrepreneurs assume they need to handle certification right after their first prototype works, which means … read more

Certification Costs – What It Really Takes

Published on by John Teel


Certifications are one of the most confusing and stressful parts of developing a new product.

It feels overwhelming because you don’t know what certifications your product even needs, you don’t know when in the process you need them, and … read more

10 PCB Design Mistakes That Damage Product Reliability

Published on by John Teel


Your PCB design can look flawless in CAD.

But if it can’t survive once customers start using it, then you don’t have a product, you have a prototype.

And a prototype that fails after shipping isn’t just annoying.

It’s … read more

9 PCB Design Mistakes That Fail FCC/CE Certification

Published on by John Teel

Failing FCC or CE emissions testing can kill your product before it ever ships.

And it happens far more often than you’d think.

What makes this failure so devastating is that it’s not something you can patch or fix with … read more

9 ESP32 Design Mistakes That Kill Your Product

Published on by John Teel

The ESP32 looks like the perfect chip.

You get Wi-Fi, Bluetooth, dual-core processing, plenty of memory and peripherals… and it’s dirt cheap.

It’s also everywhere from DIY maker projects to full-scale commercial products. It’s one of the most popular chips … read more

8 PCB Design Mistakes That Kill Wireless Performance

Published on by John Teel

Wireless is one of those things that makes or breaks a product. Your PCB can be designed perfectly for functionality, but if the wireless doesn’t work reliably, your product is dead in the water.

So in this video, I’m going … read more

6 PCB Design Mistakes That Can Destroy Production

Published on by John Teel

Just because you’ve got a working prototype doesn’t mean your design is ready for production.

I saw this when I was a chip designer at Texas Instruments. A new engineer was bragging to me that his latest design worked perfectly … read more

7 PCB Design Mistakes That Will Fail Certifications

Published on by John Teel

Certification testing is already time-consuming and expensive, and that’s assuming you pass the first time.

But if your product fails, it can quickly spiral into redesigns, extra testing fees, and long delays.

I’ve seen plenty of designs that were fully … read more

Don’t Ship Bad Units: How Factories Test Electronics

Published on by John Teel

If you’re developing an electronic product, you’ve probably tested your prototype by hand checking voltages, probing signals, or just seeing if it turns on.

That part’s easy.

But what about when you’re building a hundred or ten thousand units?

How … read more

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