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I'm installing a cheap IR led board like this.

Do they need any kind of driver? Or just a 12V power supply switched with a relay (to power on/off) If so, is there any kind of consideration I need for the relay?

(I'm controlling the thing from a raspberry pi keeping power source separated)

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  • \$\begingroup\$ oh wow, did not noticed it wasnt public. Im updating the link. Thanks for pointing out. As for the relay you are right. A relay for switching on and of the led's from a gpio on the Pi . \$\endgroup\$
    – javirs
    Apr 9, 2019 at 10:47
  • \$\begingroup\$ That link will be out of date as soon as the store decides to sell some other variant, and then this question will no longer make any sense. \$\endgroup\$
    – pipe
    Apr 9, 2019 at 11:06

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In the listing it says:

Tensión: DC 12 V

Which means: Voltage: DC 12 V

Which means you need to supply 12 V to this board. Unfortunately no current consumption is mentioned, my educated guess is that this board will consume less than 200 mA so any supply that can output 12 V with 0.5 A (or more) will suffice.

Instead of using only a relay I advise you to get a relay module designed to switch LEDs etc on/off from an RPi (or Arduino). Such a module will contain the relay but also a transistor which is needed to operate the relay. An RPi by itself isn't suitable to drive a relay directly. I recommend a module like this one:

enter image description here

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  • \$\begingroup\$ yeah! I've used those in the past. So easy. So for the powering of the board no driver is needed? Just ACDC providing 12V 0.5+A straight to the board and this relay in between the + wire AFTER the transformer. we agree ? \$\endgroup\$
    – javirs
    Apr 9, 2019 at 11:09
  • \$\begingroup\$ hi, I noticed there is an LDR in the board among the leds .. the only reason for it to be there would be that the board automatically switches on-off, could it be ?? \$\endgroup\$
    – javirs
    Apr 9, 2019 at 16:50

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