Dual mode button? Momentary and locking?

[KarrMcDebt]

I ran accross these cool little LED display stands at the dollar store. It has 3 LEDs, red, yellow and blue, and rotates through the colors.

I runs on 3 AA batteries, so its perfect for use in e-cig mods. Only problem is that its activated by a momentary switch, and I want it to come on when the master switch is activated.

So, is there a switch that is both a momentary and a locking in the same switch? Am I looking for a spst, spdt, dpdt or dpst? Or something with more letters LOL.

I'm thinking its most likely a custom dpst.

Does such a creature even exist?

Thanks
KarrMcDebt

 

[schaedj]

Don't know on the first part of your question. If you find one, post it.
On the second part:
S - Single
P- Pole
D - Dual
T - Throw

A typical on/off type switch is SPST (one connection, make or break)
Some switches are two separate lines, make or break (DPST)
Some switch can turn a signle circuit one of two directions (on(1), off, On(2)) (SPDT)
Some switches have two circuits and can turn one or the other or both on (DPDT)

Unless you are doing something like a 3.7 / 5V switchable with a master off, you need SPST.

 

[KarrMcDebt]

Thanks for the breakdown. Ends up I got lucky and don't need a custom switch. If you use the momentray switch to activate the circuit and the power is interupted, (i.e. master switch) when the power is reestablished the circuit is still active.

That means that I'll be able to use the orriginal momentary as a "stealth" button to activate and deactivate the lights. The master switch will have no affect on the lights, (other than to deprive the circuit of voltage when open.)

So I just add the whole circuit like I would an LED and its good to go.

 

[Sci]

There are also toggle switches that are momentary one way, & full on the other way. Middle is off. Mom\Off/On