Hello,
I’m looking for a sensor I can connect to Arduino that will measure the power through a higher voltage line (110 or 220V) and return results in such a way that I can read them on an Arduino (either though Analog, I2c, serial, etc…).
I’ve not gotten far with google, as the keywords intersect with many irrelevant results (low power sensors, or results on the power consomption of sensors, etc…)
Technically you could set something up on your own through voltage division. All you would need is a few high power resistors to hook up to the analog input. The analog input does have a 5V limit, and I am pretty sure the input is limited to a DC resolution, but I can’t remember 100%. You would need to limit the current going into the analog ports to around 40mA (so selecting the right resistors is important).
Now if you are wondering if there is some sort of Arduino daughter board, I am not quite sure of a product that does that.
When you say measure power are you looking to verify that the power is on or are you looking to see if you have 110 vs 220 voltage?
Or by Power are you looking to measure Power used(Voltagexcurrent) at a specific voltage?
Depending on the questions I think we could narrow down better options. For instance if you are looking to measure power we have several options in current sensor including some boards that would be easily intigrated into an Arduino. You would need to know the amount of current that could be going though the line to make sure the sensor can handle that range.
Hi Robert,
Those are great suggestions
I’m trying to measure actual power (in W) or energy (in J or kWh… can integrate power or differentiate energy to go back and forth)
For a home application (AC 220V)
Thought about measuring current and multiplying by 220 to get power but that wouldn’t adapt automatically to 110V system I have Elsewhere.
Which is why I’m wondering whether there’s a component that measures power ( or energy over time) but more as a standalone sensor independent of voltage as a parameter.
A current sensor could be a interesting option, at least for the moment. One of your suggestions that caught my attention were the ACS723 boards (https://www.digikey.com/product-detail/en/sparkfun-electronics/SEN-14544/1568-1881-ND/9452026). But can those measure current through a 220V line (such as, for example, a lamp at home powered by the main electrical lines) ?
There is no single sensor, at least as far as I’m aware, that provides an output measured in Watts or Joules. You will need to combine a current sensor of some kind and a method to determine your line voltage.
As for your other question, a current sensor like ACS723 uses the Hall effect to measure current using magnetic fields and is galvanically isolated from the rest of the circuit. The sensor’s isolation is rated for a working voltage of 297V (rms) so it would be fine for 220V line voltage. Sparkfun notes that their breakout board for the ACS723 isn’t designed to handle the IC’s maximum isolation of 2.4kV, but they don’t say what their actual max is. I would assume it’s okay for 220V though.
In general, a current sensor doesn’t care about voltage because that’s not what you’re putting into the device.
Hi Robert,
I am looking for a similar voltage & amperage monitoring device that is compatible with either an Ardino or Rasberry Pi . I need something similar to a power quality analyzer that will monitor and look for changes in voltage and amperage & kWh, voltage spikes, harmonic distortion and all changes based on the load input of a stepper motor which will be controlled by a Rasberry Pi or Ardino controller.
I would appreciate any suggestions related to any devices I may use that I can purchase for a project I am working on.
The project I am working on it is based on detecting the friction and or torque changes the stepper motor will run into as it rotates a safe combination lock clockwise and counterclockwise. The goal here is to create an adage combination auto dialer that will turn slowly and base its locating the combination locks gate and the combination digits, as it runs a program based on the number of wheels and number of digits and type of lock the auto dialer will be used on.
I am hoping that so can locate a device that can take readings fast enough like 500000 readings every 1/10 of a second as the combination is turned 2.5 digits every 2 seconds.
Regular auto dialers tear a lock open as they go so fast back and forth trying every combination that is possible on a lock that cannot take more than 20 hours worth of use.
Sorry for going into great detail, just wanted to explain what I am hoping to locate the first go around.
Please let me know if you have any suggestions.
I am looking for a voltage & amperage monitoring device that is compatible with either an Ardino or Rasberry Pi . I need something similar to a power quality analyzer that will monitor and look for changes in voltage and amperage & kWh, voltage spikes, harmonic distortion and all changes based on the load input of a stepper motor which will be controlled by a Rasberry Pi or Ardino controller.
I would appreciate any suggestions related to any devices I may use that I can purchase for a project I am working on.
The project I am working on it is based on detecting the friction and or torque changes the stepper motor will run into as it rotates a safe combination lock clockwise and counterclockwise. The goal here is to create an adage combination auto dialer that will turn slowly and base its locating the combination locks gate and the combination digits, as it runs a program based on the number of wheels and number of digits and type of lock the auto dialer will be used on.
I am hoping that so can locate a device that can take readings fast enough like 500000 readings every 1/10 of a second as the combination is turned 2.5 digits every 2 seconds.
Regular auto dialers tear a lock open as they go so fast back and forth trying every combination that is possible on a lock that cannot take more than 20 hours worth of use.
Sorry for going into great detail, just wanted to explain what I am hoping to locate the first go around.
Please let me know if you have any suggestions.
Hello,
I was not able to locate many options with that sample rate but may have a good match with part number 2084-MIC-1816-U0A1E-ND. I will add the link below. Maybe someone else will have better luck.
MIC-1816-U0A1E Advantech Corporation | Test and Measurement | DigiKey
Thank you
Ryan
I have a question about creating a topic name for a project based on the following project requirements.
Using an Ardino Nano or other model or a Raspberry Pi controller.
Would like to use a 12 volt battery if a monitoring device is available to monitor and record and apply the data taken from the load from a stepper motor which is being controlled by the ardino nano other models or a Rasberry Pi model.
Need to have readings taken near or close to 500,000 every 1/10 of a second and monitor voltage & amperage use as small as the lowest possible changes in both voltage and amperage changes of the load of stepper motor as it runs a program that rotates a dial on a combination safe dial project to prevent destroying a lock like a regular safe combination auto dialer does.
If I can locate the device that can read the changes of any friction and or loose torque detected as the dial is rotated clockwise and counterclockwise then I would be able to get started.
If I need to use an AC based stepper motor that has a device available that will also work provided that a filter will be in place to eliminate all harmonic distortion coming in to ensure that the voltage used by the stepper motor has a pure sine wave and voltage input.
Please let me know what your suggestion would be for a topic to locate a device which may help me to create this project using either an Ardino or Rasberry micro controller to run the stepper motor program.
Hello zsaa2025
Welcome to the TechForum
If you are looking to monitor the torque of the stepper motor, you may want to look into using a RotaryEncoders
It may be difficult to monitor the current on the stepper motor as the current is being pulsed through the coils to move the motor How to Drive a Stepper Motor - Electromechanical / Motors, Actuators, Solenoids and Drivers - Electronic Component and Engineering Solution Forum - TechForum │ DigiKey
Good point, @anthony_14117,
It’s even worse when we consider the inductive nature of the coils. The RL circuit takes time to respond at each step. Stated another way, at slow speed we can obtain a reasonable current measurement some t after a step. At high speed, things are messy.
Cordially,
Aaron