| ??? 10/15/10 07:36 Read: times |
#179118 - Colour?? Responding to: ???'s previous message |
Joseph Hebert said:
Hi Jecksons,
I think used different dimention of parts for heap and placing zigzag or not parallel up and bottom will made easy task... .............................................. If I am wrong about any of these assumptions let me know. For now I will proceed with these understandings. You say that rotating one side off-orthogonal will "make an easy task." In fact it will not, and what's worse it can actually mess up your autorouter. Look up and study "channels," or "routing grid" and "manhattan distances" in your software's manual to learn why. As for why you believe it will make your task easier, I'm guessing it's about visualizing, or visually distinguishing, what you are working on. Use colors instead. All EDA software uses varied colors to display the different layers, specifically so the different layers can be distinguished by the designer. The software will automatically display the color of whichever layer is active on top so that no details are obscured by features on other layers. .......................... How's about the SMD ways sometimes saw that they drawing with pile style(up components and bottom components)same place. Depending on the particular instance, this might be a very clever and elgant design solution, or it could just be a lazy and (hopefully) lucky designer. Some chips, like memory chips, are designed with pinouts that are amenable to this type of interconnection. You can place chips directly onto the same pads, with one chip in mirror image, and they both work. In such cases as this it is an elegant technique that allows for bus net management. ................................. It's true that SMT pads on opposite sides of the board won't short together, but they will capacitively couple. If the circuit still works, it's likely because the designer was lucky. Unless you have a specific reason to do otherwise, it's a good idea to shift parts so they don't align. Or if you need to line them up, at least do the math to make sure that the added capacitive coupling isn't going to mess anything up. I hope this helps, Joe Hai Joseph Hebert Man That is good..... Joseph Hebert said:
. Use colors instead.
All EDA software uses varied colors to display the different layers, specifically so the different layers can be distinguished by the designer. The software will automatically display the color of whichever layer is active on top so that no details are obscured by features on other layers. Joe I'm thingking this...Top(up)layer is Red meanwhile the Bottom layer is Blue(the track).Pads,etc is Green. How's about changing the colours of bottom components and up components colour(also the values of top and bottom components,etc)...Is that possible? :-)....Or Just didn't studied yet? It become easy than not display the Top or Bottom or etc.. Thank you Jeckson Ben |
