Electronic Basics #19: I2C and how to use it
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- Опубликовано: 27 фев 2016
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In this episode of Electronic Basics I will present you the most important facts about the communication protocol I2C and how to use it with an Arduino.
Music:
Killing Time, Kevin MacLeod (incompetech.com) 
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Well, I'm still confused... I guess I have to do things myself to actually understand
For me you moved away to quickly from the I2C theory and got to involved in the radio module. I'd rather have seen you explain how the bus works with single and multiple devices. Although I could follow what you were explaining, I believe it's going to be to complex for a lot of viewers.
I compliment you anyway on doing an excellent video. Presentation and detail were precise and professional.
+Kenneth Tan Agree with you on that, sir.
I was completely lost when you explain about those bit ordering.
+Kenneth Tan I think that explaining very technical subjects such as the detailed bit order used in I2C is not easy in a video. I learned electronics before I went to university and became an engineer mainly by reading the manufactures specification documents. This was in the '60s and '70 so no Internet, RUclips or Facebook. I would write to the manufacturers and ask them for data sheets and catalogs. When they came I would read them over and over and over trying to understand the meaning of all those words and numbers.
Now you don't have to write to the manufacturers but, if you want to really understand what these parts do, you should use the Internet to find the data sheets, catalogs and application notes.
For example, here's the I2C web site with very detailed explanations of how it works. (i2c.info/i2c-bus-specification) It can be a bit overwhelming but if you keep at it *AND* watch videos like this one, you will figure it out. For me, someone tells me how a thing works is not as powerful if I struggle through the process of figuring it out myself.
Good luck. I admire you all for taking such a keen interest. For me it has been a 40 year process of solving puzzles and getting paid to do what I would have done for free.
+Robert Shaver Actually Robert, GreatScott does an excellent job explaining technical stuff, but my opinion about this video is, that he should have sticked with more detailed I2C subject matter. Still it remains a very good video
Robert Shaver yes I agree with you. It is much more valuable to learn it by self teaching and imagine how awesome it will feel to finally get it! I’m on that journey myself to learn synchronous data communication such as SPI and studying a lot of resources.
A good description of I2C would take an hour.
This is such a great channel. What ever technical stuff you search in RUclips, you can just find the most in this channel and with precise explanations.. woah..
Thank you so much, been self learning radio theory and building basic transmitters for a while. This is by far the most helpful series of videos I've found to date.
As always great video! I was just asking for an I2C video from another electronics youtube page and 30 minutes later you uploaded one XD
its always nice to watch your vídeos, really love them !
Best video in a while, Thanks for the break down
Looking forward for the 2nd part of this video!
Thanks for the real life example! This is by far the best explanation I've seen.
As always great video. Thank you for the useful information.
Love your videos ! FM IC Was a great way of explaining I2C Interface .
great job great scott
Enjoyed it. Thanks for posting.
Another awesome video. I can't wait for next video!
I always use I2C but never how it work before. Thanks. ;)
you are a genius, congratulations! in the future I hope to see you over youtube, merits much more!
Good project, as always
Love your each and every videos
awesome as always
I just love ur videos! very well explained
I love your content keep up the good work
Perfect tutorial! I hope that you would make more I2C or one wire tutorials!
thank you GreatScott!
Nicely explained. Thanks.
Love your videos. so interesting
Nice video again!! keep going
Great video Scott. Just one comment though, the oscilloscope traces show that the rise times are rather long, 10k pull-up resistors are rather lazy. Most device data sheets recommend smaller values, like 3k3 or 4k7. I use the Arduino processor's bigger brother, the ATxmega which runs much faster. Even with a software i2c driver I can run at full speed of 400kbits per second. At this speed I need 1k5 pull-ups to avoid data corruption. If you're worried about supply current, remember that current only flows through these pull-ups when the line is driven low and they float high when the bus is idle. So if you have only occasional message traffic the duty cycle is incredibly low, meaning the supply current increase is negligible.
Great points!!
Your comment is interesting, but the capacitance of his oscilloscope's probes creates an RC that is most likely the reason of this lazy rising time IMO. As you can see the falling time is much shorter because the current doesn't flow through the resistor but thru the MOSFET instead. If he changes the pull-up resistors from 10k to 4.7k or even 3.3k, it won't make the rising edge much sharper. The only way for him to make sharper edges is to disconnect the probes and significantly reduce the parasitic capacitance.
@@Les-electroniciens yes it is the scopes fault but not because of the RC but because the scope has only 1mb of memory and can not display accurate information
Excellent video !!! Thanks !!
ahah you write your "1"'s just like my german physics professor, gets me every time! "why's he writing a hat?" :p
Wow, I lost you right at "If you've ever implemented...."
Awesome vid!
Jut what I need it
thanks men I was about to start working on i2c protocol
I love your handwriting!
Great vid thanks.
Yes!!!!!!!!!!!!!!!!!! I love the electronics basics! Can you make more how current works and stuff?
I remember watching this 5 years ago and I understood nothing. I got to learn Assembly in university and now it seems so intuitive.
Nice tutorial,,
Make more I2C and arduino..
Thank you.
Nice job.
Good video that gives a nice overview of how to use a scope with a Arduino to see the i2c. Thank you! Sure, it is not detailed. But it does give a good overview.
You should totally do a video on spi and/or o e wire. that would be so great!
Awesome.
Your first Video that is hard to understand for me, but excellent
Why ... why does it look so much fun :D I now gonna buy me some more I2C devices.
I do have a few already but your video made me wanna get a FM reciever. Great videos like always and your outro sounds alott like: "Daithi De Nogla"... But yours are alott more informative, and equal if not more fun to watch :D
(comparing a gaming channel with Electronics? why not both! one day, Ill build a gameboy, with blackjack and i2c)
This bass in the intro is awsome
Cool and thanks !!!
All this technology and it always comes down to sticking two crudely torn bits of paper to label the channels on the scope. Love it. :)
@GreatScott You have great videos! I study for electronics enegineering and this year I'm doing something like "final exam project" (don't know how ot translate it :D ), and I have learned a lot of from your videos! Just like this I'm using 4 I2C devices and this video helped a lot :) Thank you very much Scott :)
+Fred Chang You're welcome
pretty nice video
Excellent, you're getting smarter all the time.
Nice handwriting. And nice video. I would suggest to lower the 10k resistor to like 4k7 - the scope signal clearly shows the rising of voltage is quite slow.
nice video
hi greatscott.............
your videos are super cool. i like them very much. i have watched your all videos nearly 5 times each.
but everytime it is interesting to watch it again......
also can you make a video about diy IR proximity sensor????
200 000 subscribers!!
Could you do an add-on video on LIN-Bus communication between 2 Arduinos?
Thanks!
Thanks for the support :-)
Love your videos Greatscott! Can you do a project video soon? I love your projects, they are very inspiring
+hypt0ny I am working on one right now.
Regarding FM & PLLs. Sanyo's CCB (Computer control bus) seems to be very popular to talk to these kind of chips as well.
can you make a video about cheap diy 3d printer kits and how well it works?
great video. Can you make one about a "shower water meter" to keep track of your consumption or a "power watt meter" to plug in between your devices and power socket?
You should do another pain test comparison of different frequencies this time.
Waiting for something abot rs232 and next generation (especialy rs485). You are good teacher :-)
I remember the old days of implementing I²C software routines in Assembly for the 16C84 ;)
home made stickers on the oscilloscope priceless :)
I am currently using RTC clock with Arduino UNO and It doesn't need any external pull up as Mega328 has internal pullup.
love from south africa
greate video :P can you make a tutorial on how you wut do this with out using the wire library ore any othere library ?
can you make some basic projects with arduino
lol I don't understand anything :/
You are not the only one.
Oh " i don't understand anything" club
I'm a new recruit. Can i join you guys?
Can you please describe pull up and pull down resistance
thanks :)
it's a challenge
Nice
can you do a video on using multiple i2c on a arduino.
it will help me alot.
greatscott , make a tv b gone whith a attiny 85 pls , i love your videos , go on!
Can you do the same video for jtag please it would be awesome thanks
I find adding pull up resistors in my project to stop working. Wire.h seams to use internal pull resistors.
Can you make a video about the one wire interface please?
dear Scott, this particular video i did not understand It was like too much knowledge packed in a very small video. Could you please make another video on this?
Great project !
Your electronics basics videos are very informative.
Can you please make a basics video on H-bridge motor driver and make a power h-bridge . :)
+Mayur Bhanushali It is on my to do list.
What is the cheapest controller in your estimation I can use to build a diy i2c circuit?
How do you connect multiple identical slaves ? For example 2 or more fm receivers ?
In a future video can u plz make the topic one wire interface? Im really interested
I have seen many cards in industry which have RS-485, Can-bus communication.
Eathernet communication and Can-bus, how single controller can do two different communication protocol
Can this fm module also transmite FM ?
Do you have video about 1wire?
Hi mr. Scott, could you please tell me which book should i read in order to understand as u understand the arduino language.. Please...
if i can suggest video. I would love to see you measure some cheap china power amplifiers for distortion or even well know amplifier IOs like LM3885 or TDA7250. thanks for videos very informative!
great scott how do you keap your elektonic components?
that amplifier module looked interesting
what hapend if you connect 2 same devices with same device address, for example 2 identical lcd modules or temperature sensors, is it possible to change device address? thx
Video about spi communication protocol
Can you make a video about SPI interface ?
Is the possibility to do do a one way circuit that the current can only flow one direction if there is plz answer this i need you help
Can you please do transistors in your next electronics basics. ☺
what is the simplest communication protocol?
nice
please please please make a video about using xbee digital and analog outputs...
Thank YOU!! YOU are Awesome!
what is maximum distance for i2c communication.
ie. i'd like to have multiple devices (mostly relays and sensors) across house, garage, workshop, well, etc .. where distance can be up to 130 meters.
is it possible ? or there's need for other solution ?
Hello greatScott, can you please make a video about the MCP23016. I tried to use this IC but it didn't work . Thanks
Awesome! I'll use it when my package from china arrives!
Hey Scott! Could you make a Bluetooth Volume controller dial for PC using arduino? I have been looking to buy some for a while but there are none out there.
Could you please make a video on how to trouble shoot arduino? I dont expect you to make a video just because of this but hopefully reply/ think about it? I was using my arduino connected to my laptop (macbook air) when the laptop suddenly restarted. The circuit was a 12v led controller, and none of the pins seemed to have shorted. After restarting, whenever i plugged my arduino in, the pin 13 led would always just come on and not blink like its supposed to. Other than that i always get the dreaded stk500 avrdude not responding 0x00 error. Any ideas why this could have happened, maybe how i can fix it? Thanks a lot for your time, really love your vids :)
Thumbs up :)
Alex