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Routing power lines on top or bottom plane?
624 1 Jul 31.2019, 09:28:10

Noobie question incoming.
On a 2 layer board with a ground plane on the bottom, where do I put my power tracks (VIN, fuse, regulator I/O,...)? Is it ok to put them on the bottom also? This would leave the top layer for signal tracks only and result in a MUCH nicer layout. It's a DC, low voltage, low frequency, low everything board, nothing fancy going on.
I have read Dave's design primer. He suggests that you reserve a layer for power tracks and one for the ground plane on 4 layer boards, but I'd very much like to keep it at 2 layers. This whole PCB thing is messy enough as it is  
Is this a good idea?

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A****min

Aug 01.2019, 17:43:46

If you cannot keep a relatively solid ground plane, then it is better to route the ground same as other signals, and add a fill later. I would put power supply on the signal layer. If the signals in the way, you can still, do via -> short trace on bottom -> via, as many time as you want. If you post picture (read as: JPG file) of the board, we can help.

 

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