Hi Seb, If you make the LED selectable, then no pin sacrifice at all and then no matter which pin...well, the most used peripherals must be avoided.
Anyway, what about RC2? (Digital 13 LED on FreeJALduino) - it can be a choice also for future Pinguinos... (why not to be us the ones which will design also the future Pinguino board - even if is named Jaluino "code_name_here"). Vasi On Jan 23, 2:36 pm, Sebastien Lelong <[email protected]> wrote: > There many PICs more or less pin compatible. I mean it needs at least to be > compatible regarding power supply, clock, ICSP, and maybe also serial. So > your PIC would also probably be usable with this PCB. > > The problem is, for instance, where to put onboard LED. I put it in RA0 pin, > which maybe is not a very good idea: RA0 also carries AN0, when using PIC > with dependent ADC pins, this one will always be included in configuration, > thus no more LED. So, where to put this onboard LED ? Meaning, which pin to > sacrifice ? Or, maybe, just don't solder the LED... Or, maybe, I should > develop a small app that would screen many ICs and report which could be > used :) > > Regarding 5V or 3V3, it's included in the design, though not sure yet if > it's properly done. There are 2 regulators, both optional (bypass through > solder jumper). So you can choose to power your board with 9V (regulated to > 5V, then 3V3), 5V (5V reg bypassed, then regulated to 3V3), and 3V3 (all reg > bypassed). Then you can choose (when appropriate) which between 5V and 3V3 > to use to power your PIC (eg. PIC can have 5V, but Xbee requires 3V3, so you > need both). It's only a matter of using the proper voltage regulator. LM317 > can do many voltage output, that's why I chose it, but I still wonder if > it'll be powerful enough. In doubt, its pin layout is compatible with other > nice regultor (fixed output voltage), like LT1117. > > PS: never tried TI chips > > Cheers, > Seb > > 2011/1/23 phalox <[email protected]> > > > > > Maybe take this one into your design too? > > > It's pin compatible with the 2550, it only needs some capacitors, and > > a different supply. > > So one pcb would make 2 nice boards... one rated at 5V, the other at > > 3.3 > > > Just an idea but I think it would be very nice! > > > ps: ever tried to write the names of those µC delivered with the TI > > launchpad? > > MSP430G2211IN14 > > > -- > > You received this message because you are subscribed to the Google Groups > > "jallib" group. > > To post to this group, send email to [email protected]. > > To unsubscribe from this group, send email to > > [email protected]<jallib%[email protected]> > > . > > For more options, visit this group at > >http://groups.google.com/group/jallib?hl=en. > > -- > Sébastien Lelonghttp://www.sirloon.nethttp://sirbot.org -- You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
