multiple power sources on a single scheme

Question

Hi all ! I'm new to eagle, and am trying to create a scheme for a circuit which have different power sources.

The goal of this circuit is to emulate peripherals with a teensy board, and for this I need to do logic level translation. The chips that'll do the translations are bound to be powered from the machine the emulated peripheral is bound to be connected onto (not sure this is correct english, TBH).

On my first try, I get 4 peripherals to emulate on a single board, and so I got 5 different power sources (counting the teensy board)

I created different nets for each power source circuit, in order to have them correctly separated, and by avoiding the usage of the "Vcc" component.

However, when I try to do automatic routing on the generated board, all chips got their "Vcc" pins connected togother...

Is there a way for me to avoid that ?

Here is the scheme, exported as an image (didn't find a way to attach zip or sch files here)

Thanks in advance for your help

autodeskguest · Accepted Answer

On 19.04.2016 21:25, Grégoire MATHIEU wrote: Hi all ! I'm new to eagle, and am trying to create a scheme for a circuit which have different power sources. The goal of this circuit is to emulate peripherals with a teensy board, and for this I need to do logic level translation. The chips that'll do the translations are bound to be powered from the machine the emulated peripheral is bound to be connected onto (not sure this is correct english, TBH). On my first try, I get 4 peripherals to emulate on a single board, and so I got 5 different power sources (counting the teensy board) I created different nets for each power source circuit, in order to have them correctly separated, and by avoiding the usage of the "Vcc" component. However, when I try to do automatic routing on the generated board, all chips got their "Vcc" pins connected togother... Is there a way for me to avoid that ? Here is the scheme, exported as an image (didn't find a way to attach zip or sch files here) Thanks in advance for your help -- To view any images and attachments in this post, visit: https://www.element14.com/community/message/195087 Check if your gnd/VCC pins are really connected to the wires in the schematic and not just accidentially ending there. The ERC will warn about this, but you can easily check by moving the devices with VCC around to see if the wire follows. If not, you need to drop it down again, and it will connect. There are some "visual issues" in eagle you need to be aware of. I think most of them happen if you copy and paste, move or bend wires. You can indeed override implicit power pins (pins defined with direction=pwr) like you have done. There will be a warning in the ERC about this, but it's ok to ignore. My ERC lists are usually flooded by these warnings.