I have a PIXAXE-20X2 and want to connect 65 LEDs as outputs! Is it possible?
Since the maximum output current for a PICAXE pin is 20 mA, you will need a driver transistor between the PICAXE and each group of 10 LEDs.

Something like this:







simulate this circuit &ndash; Schematic created using CircuitLab

The value of the resistors in series with the LEDs should be selected to produce the desired current in the LEDs (not too close to the Absolute Maximum rating!)

The transistor can be any NPN type that can handle the total current of the 10 LEDs.

If you use a separate power supply for the LEDs, its ground must be connected to the transistor's emitter, and to the PICAXE ground.