Homebrew PCBs

----- Original Message ----- 
From: "Bob_xyz" <bob_barr@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Friday, January 06, 2006 9:33 AM
Subject: [Homebrew_PCBs] Re: Autorouters


> My guess is that the autorouter did the 'elsie1' layout and you
> did 'elsie2' manually.
>
> In the 'elsie2' layout, there appears to be two unnecessary vias
> under U2. I don't think the autorouter would have done that. (They
> were probably the result of a crossing track that you later re-
> routed.) The 'elsie2' layout has a few pads left unconnected which
> are connected in 'elsie1'. It also uses varying track widths in
> different portions of the same net.

Yes, that's right. Interestingly, the autorouter only used five vias, 
whereas I used 27! I was trying to minimise connection lengths, as it was a 
L, C and F measurement system based on an RF oscillator. I also used top and 
bottom grounded copper pour, which the router won't have known about. I 
should have told it not to route the ground connections.

Leon