ERC: Pins connected in parallel

Bug #1469525 reported by Simon Richter on 2015-06-28
This bug affects 4 people
Affects Status Importance Assigned to Milestone
Simon Richter

Bug Description

For voltage regulators and standardized connectors, there may be multiple "power_out" type pins that need to be connected together in order to handle the full current.

The ERC should be extended to allow

- flagging an error if these pins are not connected
- not reporting these connections as an error

Without any change, you can easily do that:
One pin is "power_out"
the others are "power_in"

Nick Østergaard (nickoe) wrote :

@JP, that seems more like a hack than a fix. Thate scheme will then make it impossible to detect if it is even powering anything.

I consider the eeschema ERC a joke, since there are *way* too many
situations where it doesn't work correctly. For example, just insert a
ferrite on a supply pin and the pin gets undriven.

Also almost all MCU these days have programmable outputs so it wouldn't
be possible to declare what the state would be at run time...

Possible workaround: don't use ERC :D the only feature worth using is
the unconnected pin one, it warns, for example, about mistyped labels.

Lorenzo Marcantonio
Logos Srl

Simon Richter (sjr) wrote :

That's why we need to improve it. :)

Eldar Khayrullin (eldar) wrote :

Test power out pins: if pins has same label then doesn't show error.

Yanick Poirier (ypoirier) wrote :

Maybe add a "No ERC check" flag for the pins (or net), as does CircuitMaker and probably many others... That marker should be visible on the schematics. Just my 2 cents...

tags: added: eeschema
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