Hi guys,
I have designed a few PCB's over the years for Picaxe's. And there have worked out fine, but have been based around single chips.
I have been considering designing a new board for a while, that would have two Picaxe's. For the purpose of having totally independent processing. So that one could be a dedicated task processor and the other could handle serial RF communications or OLED display, or interface inputs etc etc.
I have made an out line of my prerequisites.
1) The board will be SMD as I always do.
2) It has to be small. No bigger than 30mm x 45mm. (I like small and compact)
3) I have chosen to go with 2 x 14m2. Because of their functionally vs the amount of real estate that take up, compared to higher pin count Picaxe's.
(I haven't ruled out a 3rd 08m2.)
4) It will be a double sided board with a partial double sided load as well.
5) I want it to be all in one, with output devices. e.g. SOT-89, N and P channel FET's and Solid state relay isolation. Micro piezo element.
I am confident that I can accomplish it. But this is why it has to be planned out very well first.
This is the place I require some advice.
I have never had a lot to do with Picaxe to Picaxe communications before.
What would you guys recommend, in the way of communications between the two chips. Both serially and with hardware interface on the board as well?
I am also wondering how two SOT-89 78L05 linear regulators would go driving both picaxe's independently and having a possible variance in supply voltage between the two.
How much would the effect the serial communications between the two picaxe's, and also the picaxe hardware?
Any other idea's for an all in one, that any of you guys may have dreamed of, would be appreciated But it has to be within the realm of the board size.
I have designed a few PCB's over the years for Picaxe's. And there have worked out fine, but have been based around single chips.
I have been considering designing a new board for a while, that would have two Picaxe's. For the purpose of having totally independent processing. So that one could be a dedicated task processor and the other could handle serial RF communications or OLED display, or interface inputs etc etc.
I have made an out line of my prerequisites.
1) The board will be SMD as I always do.
2) It has to be small. No bigger than 30mm x 45mm. (I like small and compact)
3) I have chosen to go with 2 x 14m2. Because of their functionally vs the amount of real estate that take up, compared to higher pin count Picaxe's.
(I haven't ruled out a 3rd 08m2.)
4) It will be a double sided board with a partial double sided load as well.
5) I want it to be all in one, with output devices. e.g. SOT-89, N and P channel FET's and Solid state relay isolation. Micro piezo element.
I am confident that I can accomplish it. But this is why it has to be planned out very well first.
This is the place I require some advice.
I have never had a lot to do with Picaxe to Picaxe communications before.
What would you guys recommend, in the way of communications between the two chips. Both serially and with hardware interface on the board as well?
I am also wondering how two SOT-89 78L05 linear regulators would go driving both picaxe's independently and having a possible variance in supply voltage between the two.
How much would the effect the serial communications between the two picaxe's, and also the picaxe hardware?
Any other idea's for an all in one, that any of you guys may have dreamed of, would be appreciated But it has to be within the realm of the board size.