[sdiy] binary to two 7 segment display thingy..

[nils]

René Schmitz wrote:

> Hi Nils and all,
>
> nice solution!
>
> I think it can be simplified even further, comparing against less or 
> equal 7 means just that bit 3 must be 0, so you can use that directly 
> to control the B2 and B3 inputs of the adder.


Uh.. that was a typo. I compare against greater than 8 (less or equal to 
8), so it not as simple picking one address line. You need at least some 
gates, and imho it does not make much of a difference if you buy a 2*4 
nand or a comparator. (The circuit I posted is correct and compares 
against the 8 btw).

That would be just to nice if it would be that simple.

I tinkerd with the idea about feedbacking the S3 output back to the 
inputs of the adder for a minute, That would eliminate the comparator at 
all, but I doubt that it will ever work..

The idea to feedback with adders however is intriguing, I have to write 
a little program to find out if it really works.  Feedbacking with an 
adder might give very cool sequence generators.. Who knows what usefull 
(and useless) sequence generators are possible.. with a single chip...

  Nils