Battery-powered models - 21
46
46. Simple LED blinking program
Connect a LED in series with a 1000 to 3000 ohm resistor. Typically
the longer length LED wire is the positive side. Touch the resistor/
LED combination to the exposed power adapter wires.
When the LED lights, you knowwhich of the wires is positive and
which is negative. Connect the Negative wire to GND on the pro
Mini and the Positive wire to the hole on the Pro Mini marked
VCC. Note this works for the Pro Mini mentioned before. There
are other variations for which this will NOT work. Only use a 5 volt
MRH-Nov 2014
