Distinguishing the 3V and 5V X2's parts

[BrendanP]

This has no doubt been asked before but I can't find it in the archives. I have a some 40X2's here and I'm not sure if they're the 5V or 3V versions. I ordered a couple of each a while ago and fried a few and I can't remember whats left. Can they be distinguished by their external markings?

BTW, I loaded my picaxe powered incubator up today with 30 odd eggs. It will hold a few hundred, I'll post some pics when the chicks hatch.

 

[hippy]

For the 3V parts there's a "K" in the PICmicro device code -

18F4520 - 5V
18F45K20 - 3V

 

[westaust55]

The place to look is the PICAXE manuals.

Section/part 1 page 13
http://www.picaxeforum.co.uk/docs/datasheets/picaxe_manual1.pdf
gives the Microchip PIC part number for each PICAXE including superceded parts and distinguishes the 3V parts form th 5V parts where applicable.