EEVblog #44 Part 1 - Logic Analyzer Tutorial

Dave gives you the what, how, and why of Logic Analyzers.

[@demoncloud6147]

I am from the future (2019), hello to young Dave with big round goofy eyes !

[@EEVblog]

That's because you are too keen to view it! It takes time (maybe 30 minutes) for the video to process after I finish uploading it, the quality is quite poor until this is done. It should say this above the video. I don't know why KZbin allow people to view it before it has finished processing.

[@rehmanzed]

This is the best chanel for electric engineer, embedded designer, and computer programmer.

[@RD-ni7qe]

My favorite aussie KZbin channel, hello from Melbourne :)

[@totosql]

@EEVblog LOL I burned my hand when I was 4 years old when I played with a 110V AC lamp every time I moved the wire I got some sparks one day I get it, after that I can't stay away from PCB, PS, AMP, PC, TV, etc... aslo I m EE, and I really appreciate your work thanks for the gift

[@EEVblog]

Nope, been doing electronics since I was 8, never had a non-electronics job.

[@nonicnik]

10 years difference but somehow it seems that you were as great then as now. Except your camera setup is better. Even your mic was really good.

[@Anamnesia]

#44... Wow! 😮🙂 I've been subscribed for a few years now, but when I searched for "Using a Logic Analyzer", this video was at the top of the ranking!

[@finsterbarry]

Anamnesia same here :D

[@sc0rpi0n0]

Thank you for the tutorials. Very very very much appreciated.

[@pierQRzt180]

Thank you for the video. I saw another video about your project in 1996 and I was puzzled "what is a logic analyzer?" (as a casual viewer that likes to see but has no electronic experience). The sentence "a 32 channle binary oscilloscope" makes it greats. But yeah it should be pretty tedious to connect all the 32 probes on the thing. I can see why people go for oscilloscopes.

[@Taran72]

Thanks for explaining this in detail!

[@greypatch8855]

(2019) just picked up and cleaned out my very own HP 16500B. My hobby is old laptops, got this to help me analyze and repair problems, plus at the time it was the only oscilloscope near me on the used market. Btw I'm new to the game

[@THE16THPHANTOM]

this guy knows a lot. this is the eleventh time i have come here

[@fullwaverecked]

Thanks Dave! You just saved me a few clams. I was looking at a very clean HP 1630 for 50 bucks, thinking how sexy it would look on my kitchen table / electronics bench. But eventually someone will ask what does that do? Then I'll have to answer "well, it's the same thing as a deer with no eyes... No ideer. ;)

[@MegaGreenman28]

I recently picked up a HP 1660as 136 ch logic analyzer/oscilloscope mainly for use as a scope. And boy is it a heavy scope. even came with the training board and floppy plus a mouse and random accessories. And alot more channels than I most likely to ever needbut it's alot better than my old scope a analog Goldstar 20mhz scope.

[@Afrotechmods]

Nice one - look forward to part 2 :)

[@rulorg7782]

where is the part 2?

[@JustinLe997]

excellent content!

[@brunosimmert6160]

immer super

[@qzorn4440]

Geee how time flies... i just ordered a: USB Logic Analyzer 24MHZ 8 Channel 12C UART SPI IIC CAN 1Wire Debug For ARM FPGA for about $10, any comments?

[@MaxKoschuh]

good tutorial. thank you.

[@davidbball13]

I did not know youtube put the video up before it is finished processing it. That is odd....Well another great video! Keep 'em coming!

[@OuterValence]

Hi Dave, Logic Analyzers address the needs of hardware and software. Providing the options of mainly state or timing. A deep memory oscilloscope will not be that useful to a software engineer writing device drivers. To debug firmware state information displayed in both timing and instruction (hex and symbol) is needed to debug. Also, for debug a special extended version of the PCB would support plugging in the channels 16 or 32 bits at a time with proper termination.

[@electrifyingelectron9792]

Hi Dave, Quick question, is there any logic analyzer which can playback the captured data. So lets say we captured data from a microcontroller and then remove the microcontroller and playback the software to emulate for that same microcontroller?

[@EEVblog]

Ah, yes, that should do the trick, thanks.

[@attepitkanen7358]

Thanks, this helped! or cofused even more ;D

[@filipenicoli_]

Hey Dave. On the last subject you talked about compressing data. Is there any practical reason not to? It seems pretty obvious for a digital-only device not to waste space like that, even because this kind of compression wouldn't even require much processing power. I know it might be tightly related to the product's design, but would you design one, for what reason would you not trivially choose compression (again, digital-only) ?

[@yanava]

Great post, but I believe that the Logic Analyzer, or even a MSO is the digital design engineer's best friend. I've been working with DSPs and FPGAs for quite some time now. Not all chips have cheap debuggers/emulators. Scopes only have couple of channels which are "too noble" to deal with simple 0-1 logic. If you're designing a circuit with a bus or complex digital signals, you should definately get a logic analyzer!

[@metaltyphoon]

Dave, can you do a review on a Saleae Logic analyzers ?

[@PauloConstantino167]

eevblog you are a combi scope mate

[@johnclawed]

I think 'compression sampling' used to be identified, in logic analyzer specs, by the ability to 'time stamp' each sample.

[@Logictemplates]

trippy bass .

[@PsiQ]

Soooo, how would you update this video.. Aaaand What of the equipment in the background is still in use ? :-)

[@MikaelMurstam]

Oscium does some great digital oscilloscopes and digital analyzers using your ipad and iphone =)

[@james2396]

The times have changed for pricing very much since this video was made

[@kenknight5983]

can any of these be used to decode the logic of a cpld chip?

[@Renegade30]

Oh man, I thought I was onto a cheap oscilloscope alternative here, but looks like it's still like flying blind

[@MrBARAK1999]

hay,can you please recommend on USB logic analyzer 4 channel up to 80$

[@robinrochan9301]

hi sir very nice and interesting video I would be very happy if you can help me there are lots of confusion what is most better than we can use in all repair work oscilloscope or logic analyser

[@Shawn_White]

what i do is i set it to "private" until I get the HD tag then set it to "public"

[@quantomic1106]

@TheAgentAR Hey! same here :)

[@jstro-hobbytech]

Do you age Dave?

[@DeeegerD]

Main advantage is that for $10 to $20 on ebay you can see what your signals are doing ;)

[@jacobcorr337]

+Digger D This is 7 years old remember!

[@scurrier03]

He already did one, search "eevblog saleae"

[@rodstartube]

@TheAgentAR why do you ask him that?

[@ernststavroblofeld1961]

Logic analyser, Bah! Use your tongue.

[@0x8badf00d]

Transistor to Tongue Logic, Nice MOS - Pain MOS - Complementary MOS, Emitter Coupled Licking

[@flo89123]

mhhh you did just fire my interest in engineering

[@davidbball13]

hey great video. For some reason the quality is very very poor compared to you're other ones.

[@download333]

I got one for $4. It's about the size of a pack of gum.

[@MaciekDrozd]

Wrong explained. Compression sampling must store timestamp at each event (4 or 8 bytes). Synchronous sampling stores 1 bit at each sample.

[@sonick808]

i have learned so much from your videos it's not even funny. Very selfless of you

[@wangshuoleon4400]

logic analyzer is just 2bits adc

[@vladimir0700]

Good video but pretty rudimentary.

[@putinscat1208]

+Frank S Were you hoping to get a degree after?

[@vladimir0700]

Putins Cat no, been using la's for many years

[@nobytes2]

Frank S Many years yet watching a "rudimentary" video hmmm ok