I am working on a simple led membrane label.
I have found the switch is more of a resistor dropping 200mV-300mV at
14mA so 15 to 20 ohms.Googling I find metion of worst case switch resistance of 500 ohms.
Looks like I need a FET to switch the current.
Why? you will no doubt need a series resistor anyway... OTOH, they don't last long with those sort of currents so use a FET...
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