Hi all,
I have a LED strip light and i want to connect its two wires to an Arduino UNO using jumper wires. Somebody please guide me on how to connect the positive and negative terminals of the LED strip to the jumper wires and then to the Arduino.
You will have to supply some details with regard to the "LED strip light".
What type of details would you like to know about?
The pertinent details (all of them).
There are many LED strips and each type is available in many lengths. Post a link to the product and specify length too.
Welcome to the forum
Do you have a soldering iron ?
I dont have the link of the product rn. But the length is around 5 meters
Yes, I do
Are you trying to power 15 meters of LEDs through your Arduino? Good luck.
Sorry I meant to type 5 meters
A) How do I make rice?
B) Get some water boiling, throw the rice in - Done!
Without know exactly what type of LEDs they are, you will not receive any meaningful help. Stock photos are not helpful either.
You cannot power them directly from the Arduino either, so it is impossible to provide you with instructions without you providing information first.
There are several different kinds of LED strips. In almost every case you'll need a separate power supply.
Make sure to buy from a reliable supplier that provides all of the technical specs/data. If you buy the cheapest thing you can find from eBay or a 3rd-party Amazon supplier, etc. you may never figure it out...
An Arduino I/O pin can only directly-power one or two LEDs. The Arduino's 5V pin can power several LEDs in a short-strip, but then you need a way to turn it on/off or dim it.
Addressable LED strips get their power from a separate power supply and the I/O pin only provides a "signal" which can control/address an almost unlimited number of LEDs. Most just use one data connection, but some also have a clock connection, so just one or two I/O pins are needed.
Non-addressable LED strips also need a separate power supply. 5V and 12V strips are common. You can use a MOSFET driver circuit to turn on/off or dim with an Arduino.
If you just need on/off control you can use a relay, but a relay coil also needs a driver. You can find "relay boards" that have a relay and a built-in driver.
Ot there are solid-state relays that can be directly driven from an Arduino, but you have to make sure to get one intended for DC.
If you have a non-addressable RGB LED strip you'll need 3 MOSFETs or relays to control the 3 colors separately.
Unless that strip has one LED per 2 meters, you can not connect it to an Uno.
Get an external power supply that can supply sufficient power at the correct voltage. Current requirement will be in the order of 20mA times number of leds; play it safe and double that because you don't know the specs.
Test if the strip works.
Next buy a logic level mosfet (that can handle the current) and some resistors. You can take a look at Gammon Forum : Electronics : Microprocessors : Driving motors, lights, etc. from an Arduino output pin, replace the motor by the led strip and you can leave the diode out.
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