EEVblog #72 - Let's Design a Product

In this supersized lecture length episode, Dave foolishly attempts to explain how to design an example product (the uCurrent) from start to finish.

The Full Article:

See also:

[movaxh]

1000 videos later. It is still most comprehensive video, and simply awesome. A sneak peak into mind of a designer.

[Wesstuntube]

Best EEVblog video ever.  Loaded with amazing advice from start to finish.

[EEVblog]

@hla27b
Yeah, in all that ranting I forgot to mention the battery life!
More than 200 hours.
I determined that it wasn't worthwhile to add an auto-off function to this first version, as that would have required an intelligent device to do it properly.

[andrewkowalczyk]

I have to say this is the best video I've found so far on the channel. Truly a gem of a presentation.

[DonPavardenis]

Dave you are amazing man. Thank you soo much for sharing with us your design. I am so happy that here are ppl like yourself who manage to find time to show, explain and put on youtube videos so that we could watch and learn. I am shaking your hand and saying "Thank you Sir, we are glad to have you as our teacher "

[EEVblog]

@killerman4ever
Bloody youtube privacy bug again! No one was supposed to see the video before it finished processing and I had added the detail!

[recordingreview]

This video is the greatest thing that has ever happened.

[russell]

I took a crack at deciphering the uCurrent schematic but a few things were leaving me scratching my head. This explains everything so clearly. In the first 25 minutes of this video I've gained so much knowledge.

[kilagiltner]

When you talk about contact resistance needing to be taken into consideration takes me back to in tech school how we took "ideal"components most of the time but even "simple"pieces of equipment you have to be very precise.like taking even say the resistance of conductors or stray capacitance into consideration.enjoyed the presentation.

[drstrangelove]

From urban dictionary:
schmick
1. I say this in Australia to mean anything sick, cool, tight or excellent.
Usually the item is new, shiny, fresh and mad bling-bling style.

[darrenjobe]

Ten years late to the show, but love the content. Was trained in electrical engineering and took a different path, but wanted to get back in as a hobby. This was exactly what I was looking to walk me through the thought process. Love it!

[geerant]

One of the best videos on electronics design. Incredibly detailed and informative.

[TheBdd]

Dave, I just saw this great video! Better than a book! Better than a seminar! Better than college courses! You have inspired me to follow through on an idea I have DaveCadded. When done the finished product will be much better because of your generosity. THANK YOU AND KUDOS TO YOU!

[nathanas]

Brilliant engineer. Spares no details and that’s important to understanding how it works

[dirkovic]

This is such an interesting video.
I love seeing how you develop that circuit and the thoughts and considerations that go into the product.
I stopped watching TV a long time ago and started watching videos like yours.

[valordk]

51 minutes of the best product/process presentation I've ever seen! thanks for sharing.

[Terribleguitarist]

Just wanted to say, love the videos man. I've been an electronics hobbyist since my teens (Amateur Radio operator since age 14 and I dabble in guitar amp and effect design/repair as well). I finally took the plunge and enrolled in a BS Electrical Engineering program this year. After 7 years of working security all over the world I'm definitely ready for a career change haha

I have several similar channels I follow but the wit, sarcasm, and humor you bring to the videos definitely make this the most enjoyable to watch. Not to take away from the value of the other channels but some can have a very dry delivery of the knowledge.

Great channel, and keep it up.

-KC9FJE

[dhpbear]

I would've thought 'reverse LED's' would 'suck' light as opposed to emitting light!

[patrickreddish]

I had bought an electronic blanket from a second hand store. It worked great I thought. It only used 8 watts. I thought "wow they have cone a long way. 8 watts nice.' then it broke a few years later. I went to buy another one to find out that I could not replace it. Every blanket I got was at least 150 watts. Devistated I didn't know what to do. I live in my RV. And to have an electric blanket that I could use for 3 or 4 days on my batteries was I wonderful thing. To use one that eats up 150 watts they would be dead in no time. 1 to 2 hours. The one I bought from the second hand store was clearly defective. But for me, it couldn't have been better. I need to find a way to bring a new blanket from 150 watts to 8 to 15 watts. So many of us love in RVs. And then there are the penny Pinchers. This would be a great thing to bring to market. Who needs 150 watts? That gets so warm it's uncomfortable. Can I just add a resister to the board somewhere to bring that down? Please help. And if you can't, can you point me in the right direction?

[RobertGallop]

Your best video yet Dave, length was perfect for such a complex topic. Please keep up the longer format from time to time, don't wait another year for one!

Cheers!