AVR-Chat

I have a similar problem/project, controlling a large number of
solenoids, which are spaced somewhat close together, but I
would like all the electronics for each unit to be easily
removable, and only have a simple communications path to
a master controller.
I am starting by using the Tiny26, which I already know well,
and it seems a good value in pins and dollars and functions.
I will have more pins than I need; I need
a PWM output, 2 analog sensor pins, and serial communication.
Also, 2 aux digital I/O. One of the analog sensor inputs may end
up being a diffential pair.

Ken



> On Sun, 12 Mar 2006, Timothy D. Lenz wrote:
>
>> I have been looking at using a 2313 for an expermental pulse motor, but
>> by
>> the time I add enough address decoder parts to do what I want, the
>> circuit
>> starts getting a bit complex. I started think about maybe using a
>> controller
>> per coil plus 1 master controller. The problem I see with the little 8
>> pin
>> atmel chips is, while they have a lot of stuff in them, you still end up
>> needing a number of external parts to demultiplex and get at them. The
>> coil
>> controller needs at least 2 output bits, one input and one interupt. It
>> would also need a serial port of some kind to receive commands form the
>> master control, and and ADC that can be used to monitor the voltage
>> across
>> the coil. I like the Atmel stuf because the chips are cheap, many being
>> under $5, and they have free development software.
>>
>
> If you're going to do that, why not just go with one chip with more pins?
> Or do the individual controllers have to be in different locations?
>
> Zack
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