Question about industrial(ish) pushbutton LED (lemmy.world)

submitted 1 week ago by wjrii@lemmy.world to c/diy@lemmy.world

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So I am working on a project where I want a big dumb red button. I got a light-duty industrial illuminated pushbutton from AliExpress (this one, if you want to know: 22mm 3v-6v, non-locking). It looks like it will be fine to use, but I'm confused about the LED. It seems to work regardless of which orientation, and I briefly tried it without a resistor, and that was fine too.

I'd like it to be fairly bright, but as someone who has blown up his share of through-hole diodes in his day, I would rather not mess up this one, since without the diode light it's sad and dumb, rather than glorious and dumb. :-)

My question is this: is there any standard for these illuminated switches that would make it likely that there is some resistor and diode stuff going on inside the housing, such that this thing is fine to just wire up and use?

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[-] wjrii@lemmy.world 1 points 1 week ago

Thanks! I pulled up a few roughly similar, though modular pushbutton videos. I also found an old reddit thread about some significantly nicer Allen Bradley switches, and some general reading about how these sorts of switches are supposed to be deployed, and I'm inclined to think the necessary components are part of the assembly already. I've hooked it up to 3.3v on a USB breadboard power supply, and I'm just going to let it run for an hour. If it doesn't burn/blow out, I'll feel confident enough to use it. It's never going to have more than that on it anyway.

this post was submitted on 11 Sep 2024

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