Noob questions regarding ExpressPCB!! (1 reply and 1 comment)
I'm making a nixie clock for my high school major project, and I am designing my own PCB to mount many of the essential components on using ExpressPCB. This is my first time designing a PCB and I have some noob questions regarding the program. I have several integrated circuits and resistors on the chip, and I have them set to the top layer, because I obviously want them all on the top. But I understand that I have to solder them from the bottom of the PCB, However, for the ICs (not the resistors though), there are traces connecting to different pins from both the top and bottom layers of the PCB, as I have decided to use the top layer for logic and the bottom layer for power and ground (except for three logic lines I put on the bottom layer so they could cross under some logic lines on the top layer) to prevent traces from crossing over. I'm worried that this means I will be unable to solder on certain components the way I want, and I need to know what traces I should be putting on what layers. Here's what I have so far. Red is top layer, green is bottom layer, white is silkscreen, pads are also red. Can anyone help?
It's actually pretty straightforward. You are OK with what you are doing. However, you need to understand the concept of vias. A via is nothing more than a metal-clad or lined passage or hole used to communicate traces on one surface with a connecting trace on the other surface without the co-location of a component lead. If you lay out traces and solder pads on a surface, you will be able to solder to those pads. Just use a via each time you need to shift continuity from one side of the PCB to the other.
Hope this helps some. If you have more questions, just post them back to this thread...
thankyou so much!!