GND routing uses the same thin traces for pots (presumably analog) and servos, could add noise to analog signal. If you use plastic standoffs that only take space on bottom layer, still a good idea to define a keepout zone to prevent a SMD from ending up in the wrong place. That way you'll easily see if the screw head collides with something. When putting mounting holes, use pads instead of holes and make the pad a little bit larger than the size of the head of the screw you'll put in. If the three headers on the right go to analog inputs, then they need at least some filter caps. #9 The vertical barrel connector could make plugging connector #10 awkward. In fact it would probably be much simpler to power the whole thing with a 5V wall wart. If the 1A load is frequent, I'd use a switching converter for efficiency and convenience of not having to bother with a heat sink. #8 without heat sinking, this 7805 won't be able to dissipate the power you intend. It costs nothing to space your SMDs (#5) a bit more, or push some traces around. #1-#8 beware of the autorouter routing traces really close to pads or at awkward angles, if the pcb fab is cheap and the soldermask is a little off, the track that is close to the pad could be uncovered and you get solder bridges.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |