I'm having trouble finding a switch to fit my needs. I'd like to set up a 'panel open' switch on a project box that triggers an interrupt on the adruino when the lid is removed. If I'm reading these parts right, an ON (OFF) momentary switch is what I need, wired to ground and pin 2 or 3 on the arduino. I need one with a decent amount of play, maybe 1/2" (1 or 2cm) or more, so I can compress it when putting the lid on. I looked around online but I can't get a good feel for what I'm seeing without actually holding them. Anyone have a good suggestion?
reed switch?
As fungus says a reed switch would be good, with a magnet mounted in the lid I guess.
Or for a mechanical switch, you could probably use one of these where the lever will give you the play you need. I think they aere available with a more "wiry" lever than that one shows.
You might not need to mess around setting up an interrupt: remember that loop() is, well, looping, and fast, so just polling the switch in loop() may be enough.
I'd definitely prefer a mechanical switch. I've got a GSM shield in there with some sensor boards and I'm a bit iffy about adding magnets. I'll check out those lever switches.
You might not need to mess around setting up an interrupt: remember that loop() is, well, looping, and fast, so just polling the switch in loop() may be enough.
I'll be waking the arduino from sleep so I'm stuck using the interrupt.
Edit
Yep, that's what I'm looking for. I was stuck looking for push button when I needed snap action. Thanks!
It is called, among other things, a plunger interlock switch.
Or this contraption which is a microswitch with a plunger so the relatively fragile switch is not exposed to damage.