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how to know what voltages the smd led of a tv work with

jesus201

347

hace 5 años

good afternoon to all my colleagues always grateful for your help the following is to know how aria to measure what voltage are the led or led smd strips of the led tv In what part should I measure to know the value in voltages of these strips Well I say goodbye and I hope for your help.

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nicomena2015

9.501

hace 5 años



hace 5 años

Hello colleague: what you can do is measure one of the original LEDs of a strip with a LED tester to see if they are for 3v or 6v ... then check the strip and see if they are in series or parallel ... there are several ways to test a led ... you can use a voltmeter a DC source between 12 and 25v ... and an R of 1kohm ... I leave you an image of one of the simplest ways to measure a led ... you need a DC source between 12-25v ... a digital voltmeter ... and an R of 1kohm ... if you have knowledge in electronics you will see that it is very easy to use this circuit ... there are other more complete testers where you can measure one or all of the strip ... ok .... greetings !!!

[img] https://adjuntos.yoreparo.com/imagen_post/0005/227776abd06db6db6db7dc06d2d2d2d2 img]

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jesus201

347

hace 5 años

Thank you very much I have seen that they measure the output of the source directly to the LEDs and the value that is there divided by the amount of LEDs that are allayed if they are in series which is the most common
Asked me can you that way

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nicomena2015

9.501

hace 5 años

you have to check the strips to see if the LEDs are in series ... if all the LEDs are in series then there is q, know what, voltage are ... (example) if they are 3v and there are 40 LEDs ... you multiply 40x3 = 120v ... if they are 6v 40x6 = 240v ... but this is not always the case ... if you have knowledge, build the bottom tester ... it works with 110vac of the electrical network ... if you have 220vac you have to change the filter of 10mfx250v x one of 10mfx400v ... and change the Rde 10kohm x one of 22kohm x3w ... with this tester you can measure the complete strip and see what voltage you need each strip ...

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jesus201

347

hace 5 años

And where it would show me The voltage would have to be placed The multimeter also true excuse my ignorance

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nicomena2015

9.501

hace 5 años

the multimeter you have to always connect it to the ends of the cables where you are going to measure ... if you are going to measure a led the multimeter has to be connected right in the positive and negative terminals of the led ... if you are going to measure a complete terminal strip equal to the voltmeter tips go to the positive and negative of the strip ... in the lower tester without connecting it to a led or the strip can give you 170v or 300v in the voltmeter ... but when connecting the tips to a led will lower the voltage to 3v 0 6v according to the led .. when connected to the power strip it will drop to a voltage q, is the sum of all the led

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