Connect 'Source' signal name to 'GND'

Am 09.04.2018 um 14:25 schrieb dave hofer:

 

Hello,

I need to attach the 'Source' on the this diode to GND without changing its name but Eagle will not allow me to do so.  I've found older threads that mention creating a 'short' type part to do this.

But, I am wondering if this is made easier with newer version of Eagle?  I'm a maker who has managed to create 2 PCB with Eagle that actually work, but still consider myself an extreme newbie.

Any guidance would be greatly appreciated.

 

Dave

 

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Hi,

you want to connect the "anode" to GND?

You have to do it in schmeatic.

If you want to connect to the Copper-plate(polygone) you have to

name the Polygone as GND.

But in your pic there is a net connected to the anode. What is the name

of this?

GND? N$xx?

Werner

Werner,

I've added a bit more detail from my board layout.  Pin 9 is from an arduino pro mini (for reference) and all I am doing here is trigger a MOSFET.  Since the device being turned on/off via the MOSFET could have an electric motor, I added the Diode to reduce the power feedback when the motor stopped.  Without the diode, my arduino was resetting each time the motor was powered down (pin 9 pulled low).  I also discovered that this would not work unless I also connected the anode side of the diode to ground.

I do have a ground plane defined and it is named GND.

The signal name for the Anode is 'SOURCE' and it's net class is '0 default.'

I had a few of these built by Seeed Studio and they work fine when I solder a jumper wire from the Anode of the Diode to the GND pin of the pull down resistor.  My challenge is replacing that jumper wire with GND connection to the anode of the diode.

On 09/04/18 16:01, dave hofer wrote:

Werner,

 

I've added a bit more detail from my board layout.  Pin 9 is from an arduino pro mini (for reference) and all I am doing here is trigger a MOSFET.  Since the device being turned on/off via the MOSFET could have an electric motor, I added the Diode to reduce the power feedback when the motor stopped.  Without the diode, my arduino was resetting each time the motor was powered down (pin 9 pulled low).  I also discovered that this would not work unless I also connected the anode side of the diode to ground.

 

I do have a ground plane defined and it is named GND.

 

The signal name for the Anode is 'SOURCE' and it's net class is '0 default.'

 

I had a few of these built by Seeed Studio and they work fine when I solder a jumper wire from the Anode of the Diode to the GND pin of the pull down resistor.  My challenge is replacing that jumper wire with GND connection to the anode of the diode.

 

It would help if you could post the relevant part of your schematic and

a note of your intended motor wiring. Based purely on what you have

shown, the circuit doesn't appear to make sense. It looks like you've

provided a connector to wire the motor across the FET, which won't work.

Driving a DC motor (or other highly inductive load) is a very common

task and there is a standard circuit for doing it. That circuit does

include both a FET and a diode but not wired how you have.

And as to the original question... if the net connected to the anode of

the diode (and the source of the FET) is connected to ground then IT IS

GND and you should let Eagle call it GND.

Cheers,

Rob

On 09/04/18 16:01, dave hofer wrote:

Werner,

 

I've added a bit more detail from my board layout.  Pin 9 is from an arduino pro mini (for reference) and all I am doing here is trigger a MOSFET.  Since the device being turned on/off via the MOSFET could have an electric motor, I added the Diode to reduce the power feedback when the motor stopped.  Without the diode, my arduino was resetting each time the motor was powered down (pin 9 pulled low).  I also discovered that this would not work unless I also connected the anode side of the diode to ground.

 

I do have a ground plane defined and it is named GND.

 

The signal name for the Anode is 'SOURCE' and it's net class is '0 default.'

 

I had a few of these built by Seeed Studio and they work fine when I solder a jumper wire from the Anode of the Diode to the GND pin of the pull down resistor.  My challenge is replacing that jumper wire with GND connection to the anode of the diode.

 

It would help if you could post the relevant part of your schematic and

a note of your intended motor wiring. Based purely on what you have

shown, the circuit doesn't appear to make sense. It looks like you've

provided a connector to wire the motor across the FET, which won't work.

Driving a DC motor (or other highly inductive load) is a very common

task and there is a standard circuit for doing it. That circuit does

include both a FET and a diode but not wired how you have.

And as to the original question... if the net connected to the anode of

the diode (and the source of the FET) is connected to ground then IT IS

GND and you should let Eagle call it GND.

Cheers,

Rob