Electronic Basics #19: I2C and how to use it
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- เผยแพร่เมื่อ 27 ก.พ. 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) - วิทยาศาสตร์และเทคโนโลยี
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, TH-cam 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.
Well, I'm still confused... I guess I have to do things myself to actually understand
This is such a great channel. What ever technical stuff you search in TH-cam, 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.
Thanks for the real life example! This is by far the best explanation I've seen.
Love your videos ! FM IC Was a great way of explaining I2C Interface .
As always great video. Thank you for the useful information.
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
Looking forward for the 2nd part of this video!
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 !
great job great scott
Best video in a while, Thanks for the break down
Perfect tutorial! I hope that you would make more I2C or one wire tutorials!
Enjoyed it. Thanks for posting.
I just love ur videos! very well explained
thank you GreatScott!
Nicely explained. Thanks.
Jut what I need it
thanks men I was about to start working on i2c protocol
Nice tutorial,,
Make more I2C and arduino..
Thank you.
I love your content keep up the good work
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.
awesome as always
Love your each and every videos
You should totally do a video on spi and/or o e wire. that would be so great!
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
Love your videos. so interesting
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.
Excellent video !!! Thanks !!
Yes!!!!!!!!!!!!!!!!!! I love the electronics basics! Can you make more how current works and stuff?
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????
Nice video again!! keep going
This bass in the intro is awsome
Great vid thanks.
Your first Video that is hard to understand for me, but excellent
Excellent, you're getting smarter all the time.
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)
Awesome vid!
I remember watching this 5 years ago and I understood nothing. I got to learn Assembly in university and now it seems so intuitive.
Regarding FM & PLLs. Sanyo's CCB (Computer control bus) seems to be very popular to talk to these kind of chips as well.
Nice job.
Wow, I lost you right at "If you've ever implemented...."
I love your handwriting!
@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
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. :)
Awesome.
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?
Could you do an add-on video on LIN-Bus communication between 2 Arduinos?
You should do another pain test comparison of different frequencies this time.
Cool and thanks !!!
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.
can you make a video about cheap diy 3d printer kits and how well it works?
ahah you write your "1"'s just like my german physics professor, gets me every time! "why's he writing a hat?" :p
Waiting for something abot rs232 and next generation (especialy rs485). You are good teacher :-)
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 ?
pretty nice video
can you do a video on using multiple i2c on a arduino.
it will help me alot.
please please please make a video about using xbee digital and analog outputs...
Thank YOU!! YOU are Awesome!
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.
great scott how do you keap your elektonic components?
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?
I remember the old days of implementing I²C software routines in Assembly for the 16C84 ;)
Can you please describe pull up and pull down resistance
nice video
Thank you for the info , very useful , Can we add the additional board of the sam module on I2C bus , for example adding two FM modules instead of one ?
+Zaid Hussain Not if they use the same address.
Thank you
Thanks!
Thanks for the support :-)
can you make some basic projects with arduino
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.
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!
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 ?
Dear sir,
Please make a vedio on calculator I2C Bitrate
This more useful for this continues video for aspirants ..
How do you connect multiple identical slaves ? For example 2 or more fm receivers ?
Can you do a basic tutorial on SMPS.The one from wall AC socket converted to DC to power small gadgets "not DC to DC one" :)
A simple fundamental principle will be more convenient. Like simple SMPS that only uses AC input --> diode bridge rectifier --> Capacitor --> MOSFET --> Switching transformer --> schottky rectifier --> Capacitor --> DC output.
GreatScott in mostly devices are used to 4k7 resistors as a pull up not 10k :-)
Can you make a video about SPI interface ?
thanks :)
it's a challenge
Do you have video about 1wire?
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
In a future video can u plz make the topic one wire interface? Im really interested
greatscott , make a tv b gone whith a attiny 85 pls , i love your videos , go on!
Can you make a video about the one wire interface please?
Nice
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
200 000 subscribers!!
I am currently using RTC clock with Arduino UNO and It doesn't need any external pull up as Mega328 has internal pullup.
What is the cheapest controller in your estimation I can use to build a diy i2c circuit?
Is serial bus the rx\tx communication protocol?
Hi mr. Scott, could you please tell me which book should i read in order to understand as u understand the arduino language.. Please...
Kannst Du erklären, wie das mit dem Erweitern der I/O funktioniert, also wie ich damit komplexere Bauteile ansteuere, wie ein LCD, TFT oder Sensoren? Oder geht das nicht?
Hello greatScott, can you please make a video about the MCP23016. I tried to use this IC but it didn't work . Thanks
home made stickers on the oscilloscope priceless :)
Can you please do transistors in your next electronics basics. ☺
@GreatScott can you do a video on transistors please! Also I know a transistor consists of a PNP or NPN junction and was wondering if this could be used to make a laser diode since a laser creates its photons from such a junction.
The junction of a BJT transistor cannot be used to produce light. To make an LED, you need to make the n and p layers with special materials.
Hey Great Scott! Do you think the $20 oscilloscope you reviewed its relialable to analize the I2C protocol?
+José Leónidas Díaz Medrano It does not have a problem with the frequency but since you got only one input it is difficult.
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
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 :)
Can you do the same video for jtag please it would be awesome thanks
How about about an SPI video since the arduino uses it ?