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Gikfun DIY 5A Range AC Current Transformer Module for Arduino (Pack of 5pcs) EK1344x5

Q: what is the physical size of the donut CT itself?

18mm x 10.25mm x 18.3mm. The core tunnel penetrates the 18 x 18.3 face

Q: How do you use this with arduino?

The tutorial assumes that the current source is a perfect, noise free sine wave at a frequency that is less than 4.5Khz (the maximum frequency an Arduino can sample, according to Nyquist). You're measuring a square wave rather than a sine wave so the RMS calculation will be wrong. I am not familiar with DCC ++ but I guess that average current is based on the switching frequency not the signal amplitude.

Q: Can i measure a low current such as 3w ac lamp bulb? there would be only 25ma ac current.

Absolutely. If the load is guaranteed to be less than 1A, you can employ wire as small as 28awg. ( A 1A fuse is *DEFINITELY* a must!) Using anything from 24 - 28 AWG enameled magnet wire will allow for multiple turns - far more than 10. This will be more than ample to measure the current using any means you like. 24 AWG copper wire is rated for 3.5 amps, so if your measuring device is capable of measuring in the 0 - 10 VAC range, about 10 wraps of 24 AWG magnet wire should perform admirably.

4.4/5

Product ID: 292519062

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Description

Gikfun DIY 5A Range AC Current Transformer Module for Arduino (Pack of 5pcs) EK1344x5

Specifications

Brand Name	Gikfun
Item Weight	0.32 ounces
Product Dimensions	4.5 x 0.4 x 3.2 inches
Country of Origin	China
Item model number	LYSB00UT7U982-ELECTRNCS
Is Discontinued By Manufacturer	No
Number of Items	1
Model number	LYSB00UT7U982-ELECTRNCS

Have a Question? See What Others Asked

What value is the included burden resistor?

what is the physical size of the donut CT itself?

How do you use this with arduino?

Can i measure a low current such as 3w ac lamp bulb? there would be only 25ma ac current.

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Suresh K.

Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

Khalid Z.

Great experience from order to delivery. Highly recommended!

1 week ago

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