YHDC current sensor - the theory please

[richard]

I can't still figure out what I'm reading.

the output is intended to be plotted in the freely available easy to use arduino plotter, the average human will have nil chance of interpreting the data with such a small number of samples. if your load current is sinusoidal is should look similar to this

[richard]

sample data

ADC:1632,peak:608ADC:2447,peak:608
ADC:3224,peak:608
ADC:3704,peak:608
ADC:3722,peak:608
ADC:3312,peak:3722
ADC:2528,peak:3722
ADC:1632,peak:3722
ADC:880,peak:3722
ADC:576,peak:3722
ADC:704,peak:576
ADC:1248,peak:576
ADC:2032,peak:576
ADC:2880,peak:576
ADC:3520,peak:576
ADC:3776,peak:576
ADC:3568,peak:3776
ADC:2928,peak:3776
ADC:2032,peak:3776
ADC:1180,peak:3776
ADC:644,peak:3776
ADC:608,peak:3776
ADC:992,peak:608
ADC:1656,peak:608
ADC:2528,peak:608
ADC:3296,peak:608
ADC:3714,peak:608
ADC:3718,peak:608
ADC:3296,peak:3718
ADC:2451,peak:3718
ADC:1551,peak:3718
ADC:864,peak:3718
ADC:576,peak:3718
ADC:736,peak:576
ADC:1272,peak:576
ADC:2079,peak:576
ADC:2928,peak:576
ADC:3568,peak:576
ADC:3776,peak:576
ADC:3552,peak:3776
ADC:2880,peak:3776
ADC:1984,peak:3776
ADC:1138,peak:3776
ADC:632,peak:3776
ADC:608,peak:3776
ADC:1008,peak:608
ADC:1760,peak:608
ADC:2608,peak:608
ADC:3338,peak:608
ADC:3736,peak:608
ADC:3696,peak:3736
ADC:3168,peak:3736
ADC:2316,peak:3736
ADC:1423,peak:3736
ADC:766,peak:3736
ADC:576,peak:3736
ADC:792,peak:576
ADC:1392,peak:576
ADC:2240,peak:576
ADC:3056,peak:576
ADC:3616,peak:576
ADC:3776,peak:576
ADC:3462,peak:3776
ADC:2752,peak:3776
ADC:1840,peak:3776
ADC:1031,peak:3776
ADC:608,peak:3776
ADC:632,peak:608
ADC:1088,peak:608
ADC:1856,peak:608
ADC:2690,peak:608
ADC:3424,peak:608
ADC:3760,peak:608
ADC:3680,peak:3760
ADC:3082,peak:3760
ADC:2240,peak:3760
ADC:1344,peak:3760
ADC:736,peak:3760
ADC:576,peak:3760
ADC:864,peak:576
ADC:1472,peak:576
ADC:2310,peak:576
ADC:3136,peak:576
ADC:3680,peak:576
ADC:3760,peak:576
ADC:3424,peak:3760
ADC:2656,peak:3760
ADC:1760,peak:3760
ADC:992,peak:3760
ADC:608,peak:3760
ADC:646,peak:608
ADC:1120,peak:608
ADC:1904,peak:608
ADC:2752,peak:608
ADC:3440,peak:608
ADC:3776,peak:608
ADC:3648,peak:3776
ADC:3056,peak:3776
ADC:2168,peak:3776
ADC:1295,peak:3776
ADC:704,peak:3776
ADC:576,peak:3776
ADC:880,peak:576
ADC:1520,peak:576
ADC:2368,peak:576
ADC:3168,peak:576
ADC:3696,peak:576
ADC:3744,peak:576
ADC:3376,peak:3744
ADC:2594,peak:3744
ADC:1692,peak:3744
ADC:934,peak:3744
ADC:608,peak:3744
ADC:655,peak:608
ADC:1150,peak:608
ADC:1934,peak:608
ADC:2800,peak:608
ADC:3462,peak:608
ADC:3760,peak:608
ADC:3610,peak:3760
ADC:3008,peak:3760
ADC:2144,peak:3760
ADC:1264,peak:3760
ADC:678,peak:3760
ADC:576,peak:3760
ADC:906,peak:576
ADC:1566,peak:576
ADC:2416,peak:576
ADC:3202,peak:576
ADC:3696,peak:576
ADC:3738,peak:576
ADC:3334,peak:3738
ADC:2544,peak:3738
ADC:1648,peak:3738
ADC:899,peak:3738
ADC:576,peak:3738
ADC:704,peak:576

sample wave, note peaks and mid point values

[flotulopex]

Oh, I get it now, the "plotter".

I just need to monitor a current level that will trigger a relay.

I do have ACS712 but the problem is, the current has to pass inside (though) the component meaning I would need to modify the cabling inside an electric board where it is intended to be installed. But I want to avoid this - it has to be like SHELLY energy counters or so.

I just received a module, an analog AC Current Sensor SEN0211 unsing a YHDC current transformer: DFROBOT. I'll give it a try.

[flotulopex]

you cannot use a current transformer that way without a burden resistor

Does this mean there is no resistance inside the sensor?

[richard]

Does this mean there is no resistance inside the sensor?

can't tell, the picture is too blurry to read properly but i see no reference to a resistor mentioned it the bits i can read
post a link to data sheet


edit
ps, found this so no resistance inside the sensor

[flotulopex]

no resistance inside the sensor

Again as always: R T Full M