2009/7/20 Sebastien Lelong <[email protected]>: > >> 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). These are the lower 4 pins of the 8-pin connector you see on all my boards. The upper 8 are for ICP.
>> > - 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... Again, I have a lot of experience with this kind of layout. Especially the combitation of the two power supplies well surprisingly. It can be used for power distribution at both levels within the same system. And since it are different pins, mistakes result in system parts not having power, not releasing smoke ;) >> And optional pull-up resistors. > > You mean, with a jumper ? > At least a place to put them. Jumpers (you need 2) may be overkill (you can put a 2-pin header at the resistor's place and put the resistors on there if you to switch often). Two soldering pads could be usefull if the space is there. Joep --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
