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If i cut this 30cm LED strip that written 12V, how much will voltage will iit be per 2 LED's? Answered

1) can i use 9V battery to it? 

2} Its a long strip that written 12v every 2 led's, so if i cut, How much Voltage should i apply to it?


Tags:leds

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Yonatan24

3 years ago

Cut between the copper pads only. at 9 volts, all LED's will light up, but very dim.

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Nematic!

3 years ago

you cut anywhere it require 9v-12v and longer the strip more current will be required

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icengNematic!

Answer 3 years ago

You are correct that the longer the strip the more current it will use BUT it is WRONG to cut Anywhere !!!!

Always cut between the solder pads...

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MikeD50

3 years ago

you always cut at the scissors mark and solder supply cable to the (now seperated) copper tabs in correct polarity.

each (sub) section is supplied with the same voltage (12 volts in this case)

if you want to dim, you better go for a 12V PWM supply. It is not recommended to underpower with 9V to dim. Yes it works "somehow" but the dimming curve (voltage vs. light intensity) is narrow and not well defined.

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iceng

3 years ago

Now would be an appropriate time to mark the Best Answer.

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iceng

3 years ago

Each section of three LEDs is designed to use 12 volts but may also run on dimmer on 9 volt battery.

The little black resistors decide what voltage the 6 wire LED parts want and may be smart IC device driver color LEDs.

Whatever you do, DO-NOT cut the strip at two leds !

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mirahengiceng

Answer 3 years ago

yeah i just realised i see it wrongly, its per 3 LEDs. oh really? so its no harm if u use low voltage battery to a higher voltage LEDs? cuz it did light up.

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icengiceng

Answer 3 years ago

BTW I am reasonably confident 9v will not harm the strip of three.