> > > > > - we should also have a connector for serial comms. Here I can see 3 > options: > > 1. using a DB9 connector, and MAX232 chip. Big. > > 2. using a FTDI converter. Small. Expensive. > > 3. as Albert Faber suggested in the post, using a 18F14K50 to > > build this converter. Cheaper than FTDI. (as far as I'm concerned, I > > can't easily find this chip, except with high shipping rate, making it > > almost as expensive as a FTDI chip). > > 4. No other connector. We use the first, and use a USB bootloader. > > Guru Albert already developed one with jal (but bigger than tiny > > bootloader, see later). Serial comms. are done through this USB > > connector. I'd personally prefer to have a connector wired to TX/RX, > > in addition to USB connector. > > And if we do none of the above, we can have a 4-pin header: > - ground > - 5v > - tx > - rx > Cheap, small and still ease to access serial port (with only one > convertor you like for all your boards).
Yes, you're right ! I have a bluetooth/serial converter (great), and such a converter could be used with what you're proposing. Maybe we could provide mini-boards, ready-to-plug, for each of these options. Would be highly flexible, I'd like that ! > > > > > - I²C: alsways a must. An "I²C ready" board allows many experiments > > and is opened to many 3rdparty chips. > I propose a 5-pin header here with the following layout: > - ground > - scl > - sda > - 5v (= regulated ps of pic) > - 9v (= unregulated input ps) Looks ok for me. With such a standardized connector, we'll able to easily plug multiple jaluino boards together... > > And optional pull-up resistors. You mean, with a jumper ? Oh, I forgot one thing: the PCB should be a single-sided PCB... Cheers, Seb -- Sébastien Lelong http://www.sirloon.net http://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 -~----------~----~----~----~------~----~------~--~---
