Bala Chandar wrote:

> As you would all agree, when you use microcontrollers, the ideal solution
> would be to accomplish as much as possible through software and minimize
> cost and component count.

> My circuit has the following:
>    - 9 PB Switches
>    - 8 Relays (Driven by a 5841)
>    - 1 7-Seg display including the Dec.Point (Driven by a 74HC595)
>    - 2 Inputs for zero crossing signal & data from power line
>    - 1 I/O for a DS1820
>    - 2 Outputs for Data & Clock combined with outputs for Red & Green LEDs
>    - 2 Strobe outputs for 5841 & 74HC595
>    - 1 Output for an Orange LED
>
> I am using the internal oscillator of the 16F628 and MCLR is used as an
> input pin. So, all the 16 I/O pins are being used.
>
> Roman, your suggestions please.


Hi Bala, I didn't claim to do anything magic,
just that it worked without needing another
chip. :o)

What you require above is an interesting
challenge. You have 27 separate signals that
you want to connect to 16 pins? Wow.
You already have a few chips in the circuit,
in your case it may be more work trying to
do it without extra chip. More work than
it's worth? :o)
-Roman

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