Make your own current measuring sensor

[safkans]

If you're familiar with the SCT-013 series sensors, I'd like to build an equivalent sensor myself. How should I proceed? I'd appreciate your advice.

[Sideshow Bob]

In what range of current do you want to measure is it AC or DC. I also see you only have two posts. How well are you into the arts of electronics. Just so I can adjust how I/We may help you   

[sphinx]

Sorta looks like a university thesis project, if you were somewhat into electronics you would already know that it is a current transformer with a load built in hence the 1V output.

A split core type is more calculations compared to a non-split.

You want help with something let the users on sonsivri do all the guessing and figuring stuff out!

[safkans]

I want to measure AC current. I'm developing a home-use application. I've previously worked with flyback transformers at high frequencies like 3 kHz. I'm not exactly an amateur in this field. What I want is to produce a current-measuring sensor with a minimum cost, up to 30 amps. This might be outside the scope of traditional transformer logic. Who knows? I'm open to your ideas, Sonsivri members.

[sphinx]

well the cheapest one is wire wound around the cable where you want to measure your current

[sadman]

this type of sensor normaly based on linear hall effect senser and a coil wound around a ferrite or iron core i have some deisn and application note share once back home in evening

[Sideshow Bob]

If you are on a budget why not get some clones from China. I can see it would be fun to try to make by all means. But probably more expensive than a clone in the end
https://www.aliexpress.com/item/1005006849016531.html
https://www.aliexpress.com/item/32962211649.html

[sadman]

If you're familiar with the SCT-013 series sensors, I'd like to build an equivalent sensor myself. How should I proceed? I'd appreciate your advice.

Same technique or topology used in these types of sensors (SCT-013) as described in attached article and application note hope this this will helpfull for you and friends here.

[safkans]

Thank you for your valuable information. The information in the PDFs was especially helpful.

Posted on: July 26, 2025, 12:21:33 00:21 - Automerged

If you are on a budget why not get some clones from China. I can see it would be fun to try to make by all means. But probably more expensive than a clone in the end
https://www.aliexpress.com/item/1005006849016531.html
https://www.aliexpress.com/item/32962211649.html

Of course. Just a curiosity.