On Sat, Jul 19, 2008 at 2:57 PM, Robert Butts <[EMAIL PROTECTED]> wrote:
> For the following questions refer to figure 1.1 of the attached doc. > > I'd like to use a ring electrode with a back-firing smt led centered in the > ring. Drawing the schematic for the qtouch sensor, should I omit the > electrodes leaving the resistors hanging and add the smt pad in PCB? > Otherwise, I'm wondering how to represent the electrode symbol for the > schematic. Would it have a pin to connect a trace to? I guess the > footprint would have a smt pad with the diameter I want and then an inner > diameter big enough to accommodate the led. Then place the back-firing > footprint inside the ring electrode. My hurdle now is representing the > electrode in the schematic. > Since the ring electrode and SMD LED are two discrete parts I would draw them as two discrete symbols in the schematic. I would create a large ring with a single pin and a small LED. When drawing the schematic I would place the LED inside of the electrode ring. (* jcl *) -- http://www.luciani.org
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