I just got my Pololu Pushbutton Power Switch LV and was trying it out. I hooked up Vin and ground from the 5V supply on my arduino. Nothing else.
Between Vin and Gnd I have 5v of course, but when I measure between Vout and GND It shows a little over 1V and slowly drops to 0 as I keep the voltmeter on it. Pressing the switch seems to have no effect.
Am I missing something?