[ExI] Relays was Oil will never run out

[Bryan Bishop]

On Wednesday 02 July 2008, hkhenson wrote:
> Bryan, have you ever rebuilt a gasoline engine?

No.

> Put a roof on a house?

No.

> Poured concrete? 

Yes.

> Wound a transformer?  

No.

> Run a milling machine or a lathe? 

Yes.

> Used a drill press? 

No.

> Arc welded?

No.

> Built circuit boards with surface mounted parts? 

Maybe?

> Part of the reason I ask is this:
>
> "Really, for digital logic, all we need is a relay (switch). But the
> problem is that if you have 20 relays connected in sequence, you get
> voltage drop-off eventually (obviously) and the circuit just fails
> completely."
>
> Relays have problems, particularly they are slow, but this
> demonstrates a complete misunderstanding of how you hook up a
> relay.  If you have one relay switching the power for the next one,
> you can put 20 (or any number) in logical sequence and the final one
> closes just as solidly as the first.

That's good news.

- Bryan
________________________________________
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