Homebrew_PCBs

--- In Homebrew_PCBs@yahoogroups.com, "Tony Smith" <ajsmith@r...>
wrote:

> 90 degrees bends are bad as the trace will act as a mini antenna.

You might

> think you won't have a problem since you not doing radio or high

frequency

> stuff, but you will.
>
> The trace will both radiate & receive RF. It may sound odd, but

low-speed

> switch can contain high-speed noise, leading to glitches.
>
> 10, 20, 40 MHz speeds are becoming common in hobby apps.
>
> You won't get bitten often, but you will get 'odd' problems, such

as 'my

> board fails when I breathe on it!' (capacitance problem) and 'fails

outside

> my house' (local transmitter interference).
>
> Whatever happened to the groovy curved traces from years back (old
> calculators, etc). Well, apart from no hand layout!
>
> Tony

>trim<

The new version of Eagle can do curves. I recently built a PCB for a
PLD programmer with curves. (looks prety cool too :-)

-Denny