here's what i'm trying to do..
i want to connect one of these:
to a pro mini
with a 9v battery clip
and a 5mm green led and resistor
so when you turn on the switch, the green led comes on to show there is power..
the object is to run 2 bi-color leds with resistors.. Forward Voltage: 1.8V ~ 2.2V DC for Red with 470ohm resistor 3.0V ~ 3.4V DC for Blue with 470ohm resistor
for long time times.. not sure a 9v is the proper battery - i just assume it is because all you are really running is 3 leds and the pro mini... (AND slide switch and a big button module)
how how would you wire this up?
i have a general idea... you only use 2 pins, splice the led and resistor and then right to the pro mini.. if that's is correct.. why does the battery get warm? i disconnect it all before the battery ever gets too hot.. but in my opinion the battery shouldn't be getting warm. :/