What is the best way to connect backlit buttons with Arduino?

Question

Arduino

hello. you need to make it so that when you press one of the buttons, the backlight of the same button lights up for 6 seconds and turns off. What is the best way to make a circuit with Arduino? I mean, is it better to take an optocoupler, a transistor, or some kind of ready-made microcircuit?

Answer 1

Immediately take a contactor of the first magnitude, why waste time on trifles.
The buttons are very different, for some it’s enough that the pin of the arduino gives out, for some you need a high-voltage key, because they have electroluminescent backlight.

Answer 2

The simplest is a button like this https://www.chipdip.ru/product/tc002n11arg0uyub
The backlight can be connected directly from the arduino, through a resistor.

Answer 3

The maximum current on the Arduino digital output is 30 mA. (preferably 20mA) and voltage 5V.
That is, "Backlight" should be: either an LED, or switched on by a separate group of contacts.
For example, this button is not very suitable.