31. Arduino for Production! How to use the ADC with Interrupts 

can i covert directly the ADCH to an intger ?

I have watched hundreds of videos online learning electronics and embedded programming. Yes I've been bitten by the bug. Your videos are by FAR the clearest and best executed of any I've seen. Please keep up the good work sir!

This guy knows what he's talking about. With out a dought one of the best presented tutorials I've watched. By referencing the data sheet while constructing his code, he gives a much more in-depth explaination and understanding, this is far beyond most tutorials found online. A must watch video for anyone working with Atmel microprocessors.

Thanks for the input. I did make an error in the lcd library, but I corrected it in the latest vacuum pressure switch videos. I will update the program listing on the main page soon.

Thank you for your tutorials. The best set of tutorials I have seen so far

Thank you so much! You've made this process so much easier to understand for an avr newbie like me!

well explained!! thanks for providing such a beautiful tutorial

The vref is a max that the ADC will consider, but not necessarily the max that the adc will have as input.

I just saw this channel by pure luck, and what a good luck I have! you are amazing, thank so much for sharing such amazing tutorials!

thanks a lot...u helped me a lot..i am a fan of your all yours avr microcontroller series,.. great understandable explanations,.thanks daniel..

You do some great tutorials, thanks a bunch for them.....

thanks you very very much,u helped me a lot...i am a fan of your series of avr micro controller series....nicely explained..

Great tutorial! Thank you!!

Hi, Patrick. I ran into an issue with ADC on my microcontroller, and it turns out that the internal pullup was to blame: I'm experimenting with ADC on an ATmega328P, but didn't have any pots on hand, so I just laid out resistors in series to use as voltage dividers for testing, and used a multimeter to verify the voltage at each node. I connected the ADC pin to my divider nodes one at a time, and the (ADCH cat ADCL) register more or less gave the correct results, but a bit higher than I expected. I also was unable to get (ADCH cat ADCL)=0 by connecting the ADC pin directly to ground. For the heck of it, I replaced each resistor with it's own value/10, so that the divider was pulling each node to the same voltage as before, just more "strongly." Connecting the ADC pin to each of the nodes now yielded different values than the first time around, much more close to what I calculated/expected to see, but still with significant error. I suspected that the internal pullup was the cause of the trouble, so I disabled it. That was the whole problem; my ADC values were spot on what I calculated on paper. So, it looks like tri-state has to be set on ADC pins on my micrcontroller. Does the AVR you use in the video do this automatically? I don't think I saw you mess with PORT pullup/tri-state...

Great tutorial Can you also make a video on ADC in which we implement it without using interrupts?

Thanks!

Thanks for the suggestion. Can you add a link for the COM-programmer?

@anajonesr Oh thanks! I hadn't gotten that far in the playlist yet. Thanks a lot! You're a huge help!

Thanks.

Great video thanks

Thanks

Instead messing with ADCH/ADCL, you may just use ADC, which will give you 10 bit value, but then rather chose ADLAR=0 in ADMUX. For 5V Vcc referent voltage, and ADLAR=0, just use: ADMUX = (1

Thanks! :)

thanks for this!

@Nathanxiangdarby Thanks!

thank you sir... can you plz tell me how to send adc result for servo controll

when changing the frequency of the sine wave , amplitude( LOWER TO UPPER voltage ) also changing with respect frequency but my application is - how do constant amplitude ( voltage ) from different frequency in sine wave . I have number of sample is 64 and crystal frequency is 11 Mhz.

Hi Patrick, thanks a lot for all your tutorials which are very helpful. I have followed this Adc tutorial step by step and it helped me in understanding how to configure the ADC OF ATMEGA16. my problem is I am trying to use the result of the conversion and send them to the pin of the mcu and turn on and off an LED. I wil appreciate it if you can help. I looked at the internet most of them are imcomplete. Thanks

is it possible for you to do a tutorial on ADC interrupts for the SAM3x8e. I am trying to program an arduino due. Cheers!

thank you very much!

Can you make a tutorial about MCU communicating with some other visual program on PC via ports?

Hey dose the interrupt library change for controller to controller like arm ,atmega series ,pic?

Hey sir, I suggest you start teaching about using FreeRTOS on the STM32

pls sir can tell interfaceing GSM with atmega32..... and also 4 sensors interfaceing with atmega32. and one more connection of relay and motor........

Thanks for video! Made some things look much more clear for me. Also you could use adcResult[2]=(ADCH

Is it possible to make a video on using ADC in freerunning mode?

anajonesr, do you have videos how to watch ADC data on PC? and thx for very useful videos.

great!

Very cool tutorials, thanks a lot! I tried to run the ADC-Programm on a atmega8 but there is the warning: "../ADC.c:35: warning: 'ADC_Vect' appears to be a misspelled signal handler " What could be the Problem?

Is there will be a tutorial for dimming led?

Hey so if I wanted to turn more than one pin on for analog input, would I do multiple ADMUX |= (select MUX bits)?

hello, how implement measure of voltage from a battery? tks

I would recommend not to delete the pseudocode in place and type its corresponding instructions below it. It would be easier for us (beginners) to review it without having to play the video back and forth.

Hi if I want to alter the range so it shows numbers from 0 to 99 what would I need to change.

How to connect chematic? Where I can find it?

i have done the same. but it is showing error. could you please help me?

I can. This is just using pwm. Check out my pwm videos to do this.

24:26 Why don't you fill initial string with spaces and then calculate value? Because if we go from 3digit value to 1 digit value won't that bug occur again?

@donskanone ok i should write ADC_vect ^^

thank you also Sir for your immediate HELP ! I really do appreciate it...i'll gice you feedback as soon as possible. more power to you !

Nice methodical approach, but why on earth delete the comments as you code them up? They could be really valuable later, especially if anyone else has to understand/update your code, or is trying to learn from it. Good practice to leave in a good comprehensive set of comments.

"Were using base 10 so we can read the number as Humans" hahah good one!

hi sir i have some doubts can u help me sir

hy! what is sei()?

@Azlateen Watch this video to use multiple channels: QouXLz-si0A

another question if i may but it's related to the LCD I have changed the char of the adc result from char adc result [4] to char adc result [2] and it still works displaying numbers from 0 to 1023 how is that possible ?

No, youtube does not allow me to post with link in it, for some reason. Here, remove all the spaces: ht tp://avr.nikolaew.o rg/progr Fist image is the UNIPROF's GUI and a link to archive with program itself. On the bottom there is an image of circuit itself.

thank you very much for your adc tutorial . have you idea to convert adc value in kg ? thanks

sir I want to generate a sine wave from PWM , which frequency is 300 h

But how do you get the value of the ADC into the main ?

Instead of using LCD can I get output using LED?

Hello sir , I want to know how can generate sine wave with respect pwm timer1

what if? ADCSRA |= 0xCC; ADMUX |= 0x60;

boring and too much of detail explanation