Thanks. The ACS712 module can be used for both DC and AC current. You can use the same way for AC current. Same wiring. Same CubeIDE settings and same code. Just cut the wire and feed into the sensor. Please take safety precautions since AC voltages are lethal. The country which I am living currently has a law. Only the licensed Electricians are allowed to cut AC wires. I need to respect the law so I can not make a video and demonstrate. Thanks for understanding.
You are right. I have calibrated only zero ampere point. We have to calibrated at several points until rated 30 ampere We need variable load to produce variable high currents. Even 20A/ 5V produce 100W and the load I had can not handle the heat for few seconds. So for many beginner students don’t have the facility to calibrate at home If they wanted so precise measurements then they should contact current calibrating people. Thanks
Current sensor output voltage range is between 0-5 V STM32 ADC input voltage range is between 0-3.3 V These two do not match so we can use a voltage divider to make it compatible
Facing some problem with same set up .. (Used 1k + 1k resistors for voltage divider) . In live expression, the values are not updating continuously. I have to manually pause and resume. Can u plz suggest .... waiting for reply
For some microcontrollers, you need to stop and start ADC in the loop. HAL_ADC_Start(&hadc1); HAL_ADC_PollForConversion(&hadc1,1000); readValue = HAL_ADC_GetValue(&hadc1); HAL_ADC_Stop(&hadc1);
Okay. We need to find out the reason. Is the live expression not lively? Create a simple counting program. Add one to a variable every second and monitor it in the live expression Is the ADC not converting continuously? Use an LCD or OLED to display the values and see whether it is updating.
Sir checked as directed but variable can only be added / checked in expression not in Live Expression Window...if added it says feature is not available
Thankyou for this video sir. I am trying to design 3 phase overrcurrent relay. Could you please tell me how can I take 4 current inputs and 3 voltage inputs in the stm32cubeide?
Thanks. You need to use multi channel adc. I have done with 3 potentiometer input in my video-no-32 Have a look at it. Similarly you can use seven channels
Hi Abdul Hai, Thanks. I left the display part for a later video where I can combine voltage and current measurement together to calculate power (in Watt). If you want to display only the current, you can use the steps I used in OLED with DHT11 (czcams.com/video/rIqM63S9eUQ/video.html). It is very similar to displaying Fahrenheit
Thank you for your content sir.
Hi !!!
What should be done in measuring AC current ?
How to get the Vrms value ?
How to get Maxi and Mini values of Vout ?
Hi, I would love to see alternating current measurement with this sensor in this video. 🎉
Very nice and explained in detail…kindly share for AC measurement also..Thanku
Thanks. The ACS712 module can be used for both DC and AC current. You can use the same way for AC current. Same wiring. Same CubeIDE settings and same code. Just cut the wire and feed into the sensor. Please take safety precautions since AC voltages are lethal.
The country which I am living currently has a law. Only the licensed Electricians are allowed to cut AC wires. I need to respect the law so I can not make a video and demonstrate. Thanks for understanding.
@@NizarMohideen Thanku for the reply. Understand the limitations... Sir can u plz tell if voltage divider is to be used with stm32 ..?
Yes. Sensor Out will be 0 - 5Volt. Same for AC 220V.
Use 5k Ohm & 5k Ohm resisters to get 0-2.5Volt.
It is exactly same setup as I used for DC current
@@NizarMohideen Thanks for the reply..
Why the current value are negative?
sir can you please tell how to measure AC voltage using STM32
can you make more videos about zmpt101b with stm32
I think if you use sensor for measure, you should calibrate it.
You are right. I have calibrated only zero ampere point.
We have to calibrated at several points until rated 30 ampere
We need variable load to produce variable high currents. Even 20A/ 5V produce 100W and the load I had can not handle the heat for few seconds.
So for many beginner students don’t have the facility to calibrate at home
If they wanted so precise measurements then they should contact current calibrating people.
Thanks
Hi, thanks for recommending this video!
Do you have a video on adjusting the PWM with a potentiometer? 😊
In my channel
Video no 15 - PWM
Video no 16 - Potentiometer
Video no 32 - Potentiometer with PWM (It is for multi also it can be used for single)
czcams.com/video/92_CWBWXPw0/video.html
czcams.com/video/oNiz5md51G4/video.html
czcams.com/video/03IxWEe1bQk/video.html
Hi, would like to ask, can this work without the voltage divider?
For the current sensor
Current sensor output voltage range is between 0-5 V
STM32 ADC input voltage range is between 0-3.3 V
These two do not match so we can use a voltage divider to make it compatible
Facing some problem with same set up .. (Used 1k + 1k resistors for voltage divider) . In live expression, the values are not updating continuously. I have to manually pause and resume. Can u plz suggest .... waiting for reply
STM32CubeIDE Settings
ADC1 - IN9 (tick)
Parameter Settings --> ADC Settings --> Continuous Conversion Mode (Enabled)
For some microcontrollers, you need to stop and start ADC in the loop.
HAL_ADC_Start(&hadc1);
HAL_ADC_PollForConversion(&hadc1,1000);
readValue = HAL_ADC_GetValue(&hadc1);
HAL_ADC_Stop(&hadc1);
@@NizarMohideen Sir, checked these settings but same problem exist...
Okay. We need to find out the reason.
Is the live expression not lively? Create a simple counting program. Add one to a variable every second and monitor it in the live expression
Is the ADC not converting continuously? Use an LCD or OLED to display the values and see whether it is updating.
Sir checked as directed but variable can only be added / checked in expression not in Live Expression Window...if added it says feature is not available
Thankyou for this video sir. I am trying to design 3 phase overrcurrent relay. Could you please tell me how can I take 4 current inputs and 3 voltage inputs in the stm32cubeide?
Thanks. You need to use multi channel adc.
I have done with 3 potentiometer input in my video-no-32
Have a look at it.
Similarly you can use seven channels
@@NizarMohideen Thankyou for the quick reply
, I'll check it out!
This project would have been better if it had a display with it
Hi Abdul Hai,
Thanks. I left the display part for a later video where I can combine voltage and current measurement together to calculate power (in Watt). If you want to display only the current, you can use the steps I used in OLED with DHT11 (czcams.com/video/rIqM63S9eUQ/video.html). It is very similar to displaying Fahrenheit
Voltage show in display
Hi, I would love to see alternating current measurement with this sensor in this video. 🎉