#72 Making the invisible visible: Tools for debugging and re-engineering electronic designs

[@asiw]

Wow. Another fantastic video. So illuminating and clear. The level of detail is fantastic without being overpowering. Just brilliant.

[@AndreasSpiess]

You are very nice with me...

[@ggattsr]

Thanks so much for producing such interesting and educational videos. Your method of teaching is addictive. I can hardly wait for the next one.

[@AndreasSpiess]

Thanks. I try to deliver every Thursday.

[@deangreenhough3479]

Wow! I was able to fully understand every process and you provided a roadmap on how you did it. Brilliant! I'm so excited about your next project😀 Thank you Andreas

[@AndreasSpiess]

Thanks! I hope, I will get it running. It is still in the works...

[@voltlog]

Nice effort to reverse engineer the display part of the dummy load. I will add a link to your video in my reverse engineering video.

[@AndreasSpiess]

+VoltLog Thanks!

[@gripperrod]

This is a really great well explained video showing how to go about understanding an unknown circuit. Fantastic.

[@AndreasSpiess]

Glad you liked it!

[@jon_raymond]

I'm so excited for this video! Great topic! Really looking forward to the rest of this project and your video about measuring current with a oscilloscope. Keep up the great videos. I really enjoy them.

[@AndreasSpiess]

I hope, I will get everything working as desired...

[@UpcycleElectronics]

Very interesting, I am not familiar with logic analyzers, but you have peaked my interest with this project. Thanks :)

[@AndreasSpiess]

You are welcome!

[@jacquesgilbert2774]

Thank you for the excellent logical progression. It is most helpful that the videos explain why, not just how, to do things.

[@AndreasSpiess]

Thanks for your nice comment!

[@RubenLensvelt]

A first class video once again. I think your teaching skills are at university of applied sciences level. My professors of the time could take your example. Chapeau!

[@AndreasSpiess]

+Ruben Lensvelt Thanks! I taught at this levels from time to time, too ;-)

[@ranger81de]

Awesome video! Looking forward to the upcoming videos regarding current measurements with the scope and the slave i2c functionality for the esp8266. Thanks for your great videos and keep making them! Helps me a lot! Tobi

[@AndreasSpiess]

You are welcome! The I2C slave runs already...

[@abeditani8293]

unbelievable fantastic way to explain and explore the way of this unit

[@AndreasSpiess]

Indeed they are very valuable!

[@miskomisic1965]

Another great video. Even if I knew some of these things its great to learn something more. Also same forma-mentis problem handling (this is digital so I can't decode with DSO but I have to use logic analyzer) is great. For amateur as myself this is great lesson. Thanks Andreas

[@AndreasSpiess]

You are welcome!

[@AntonioBdeJesus]

What a great job man! I really liked it.

[@AndreasSpiess]

Thank you!

[@bluesquadron593]

Very nice upload! Very logical and clearly explained as usual! Funny was to see the 50+ chrome tabs :)

[@AndreasSpiess]

These are somehow my memory...

[@pcbreflux]

Thank you for your time and effort. And thanks for the tip of the cheep logic analyzer. Don't know that the prices were that low for 8ch.

[@AndreasSpiess]

It is really nearly unbelievable.

Very very good! I immediately ordered a Nextion display, so I can rebuild Your mod. I like Your swiss accent. Grüße aus Oberbayern

[@AndreasSpiess]

So, I have a few days to complete my work...

[@vianacode]

Everything's Awesome! Thank you for share your knowledge.

[@AndreasSpiess]

You are welcome!

[@Hasitier]

Interesting video. I also have this dummy load and the mod you are trying sounds interesting. I am looking forward to the next Episode of this video. Grüße aus Deutschland Michael

[@AndreasSpiess]

So, I have to hurry up... I just ordered the PCB at Osh Park.

[@rudsomlima]

Thanks! I'm always learning from your videos!

[@AndreasSpiess]

You're welcome. I like that!

[@DenysSene]

really great... I 'm also trying to find a cheap alternative to a Scalar NEtwork Analyzer to measure my ham radio antennas, like a KC901H, but I don't need all that and It's too expensive for amateur usage.

[@AndreasSpiess]

This is a different topic and I think, there are some videos around for this topic. They use a noise source, a directional coupler, and a SDR radio. But still, not really cheap...

[@NikolayAgopyan]

Thank you for another interesting and educational video!

[@AndreasSpiess]

You're welcome!

[@cyo_corner]

friend, this is very helpful. How do I implement these findings? so if I use logic analyzer to read a BUS, how do I program a new microcontroller with that same code that you read from logic analyzer?

[@AndreasSpiess]

I am a KZbinr and share my knowledge here.

[@Ncky]

5:13 is that Katarina's Shunpo ability sound?

[@AndreasSpiess]

???

[@Ncky]

@@AndreasSpiess i heard noise in background like my notification sound.

[@arthurmorgan8966]

7:44 I bought this logic analyzer before seeing this video, it’s yet to be delivered. Which software to use then?

[@AndreasSpiess]

Saleae software works but legally is not allowed for clones. Sigrock Pulseview is open source.

[@arthurmorgan8966]

@@AndreasSpiess thanks. That makes me wonder if this software pings home, like Solidworks does. If it’s a domain connected computer, they know it’s not home use and then you will hear from their sales/litigation team.

[@arthurmorgan8966]

@@AndreasSpiess on another note I was thinking, to understand how oscilloscopes work better, maybe one way is to implement a simple one (not an actual use one). Do you think one can be made with something like ESP32?

[@AndreasSpiess]

Microcontrollers usually are too slow to build oscilloscopes.

[@arthurmorgan8966]

@@AndreasSpiess yeah sampling rate will be bad. I was thinking like Bitluni’s recent oscilloscope project.

[@bryanst.martin7134]

I think those numeric displays are Serial. Without decoder chips on the board, I presume no other option. I found similar units on Digikey.

[@AndreasSpiess]

Maybe you are right. I abandoned the project long time ago :-(

[@bvtg7470]

Excellent video! Thanks

[@AndreasSpiess]

You're welcome

[@symik3]

That amount of opened windows :D Great topic!

[@AndreasSpiess]

+Krisztián László Simon And in addition I use three 27" screens ;-)

[@symik3]

Wow, awesome :D

[@pepper669]

That's very nice! Similarly, it wold be nice to improve a cheap adjustable low voltage power supply.

[@AndreasSpiess]

I will build something like that in the near future.

[@artbecker5618]

You can get a clone logic analyzer for $5 to $7, postpaid. The $15 shipping fee from the seller in the current link above is outrageous. But things change rapidly on this site, so just look around. It used to be possible to search for Salae on AliExpress, but that was stopped a few months ago. Now you just have to search for USB Logic Analyzer. The 8 channel 24MHz products are probably all made by the same manufacturer. The Salae software works great on them.

[@AndreasSpiess]

Thanks for your feedback. Salae software must not be used with the clone devices (see license agreement)

[@janakaaluthge]

Great another one, thanks!

[@AndreasSpiess]

You are welcome!

[@LearningToFly77]

Hallo Andreas, ich verfolge schon einige Zeit deine Interessanten Videos, vielen Dank dafür! Leider verstehe ich noch nicht alles und muss noch viel lernen ;-) Habe Feinmechaniker gelernt und mich als Hobby viel mit Arduinos und Raspberry beschäftigt. Deshalb wollte ich fragen, ob du mir ev. ein Buch oder eine Webseite, Videos empfehlen kannst um die Grundlagen der Elektrotechnik zu lernen? Für einen Tip wäre ich sehr dankbar... Hast Du eigentlich keine eigenen Webseite? Gruss aus dem Berner Oberland ;-)

[@AndreasSpiess]

Da ich in meiner Jugend eine Einführung in die Elektronik genossen habe weiss ich keine bestimmte Seite, die einen Kurs anbietet. Ich verwende jeweils Google, um meine spezifischen Fragen zu beantworten. Das Buch, das viele als das beste Elektronikbuch bezeichnen ist The Art of Electronics (www.amazon.de/Art-Electronics-Paul-Horowitz/dp/0521809266). Das ist allerdings Englisch, teuer und dick. Da findest du allerdings fast alles (analog und digital).

[@dl8cy]

as allways it was useful and interesting in the same time! :-) Many thanks for you educating videos!

[@AndreasSpiess]

Thanks! Glad to hear that¨it is useful.

[@oskimac]

useful and interesting

[@AndreasSpiess]

Thanks!

[@alterratz665]

I recommend using the cheap clones with pulseview (which is part of sigrok sigrok.org). This way you get a really affordable tool and do not steal software from saleae. Also ist is really easy to write plugins for sigrokdecode. This allows even low level protocols like I2C to be used as input to a high level analyzer, so you can easily decode information in idividual registers. Thank you for your videos. I find them quite useful. Greetings from Austria, the country without kangaroos :-)

[@AndreasSpiess]

After the price increase of Saleae a very good alternative...