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Author Topic: Just to make sure i am not doing anything stupid  (Read 321 times)

Offline kurt-olsson

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  • 737 -mixed year OEM panel builder.
  • First Name: Peter
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Just to make sure i am not doing anything stupid
« on: September 21, 2018, 01:47:33 PM »
I am 99% of this answer but i want to check anyway.

When dealing with both 5v and 24v in a circuit i join the negative black cables from each power supply in the circult.

example is a circuitboard i am creating that uses a mosfet fed with 5v for backlight. And also i use 24v for the ULN2803A darlington driver. On the circuitboard i connect both negative together from each PSU and also to my teensy GRND.

My question is that i would like to join the negative on a separate bus so i only got three cables coming in to each panel.

5v+, 24v+ and negative black.

Otherwise i have two negative cables, not that much hazzle but its more simple to just have one.

What do you think?


Offline kurt-olsson

  • I am chained to this website!
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  • Posts: 1,148
  • 737 -mixed year OEM panel builder.
  • First Name: Peter
  • Home Location: Gothenburg
Re: Just to make sure i am not doing anything stupid
« Reply #1 on: September 21, 2018, 01:49:49 PM »
Not finished but this is the circuitboard i am working on. It will add a 5v mosfet for dimming backlight.

Then all negative cables are joined together.
« Last Edit: September 21, 2018, 01:54:08 PM by kurt-olsson »

Offline kurt-olsson

  • I am chained to this website!
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  • Posts: 1,148
  • 737 -mixed year OEM panel builder.
  • First Name: Peter
  • Home Location: Gothenburg
Re: Just to make sure i am not doing anything stupid
« Reply #2 on: September 21, 2018, 01:57:12 PM »
By the way Rob, if your still selling your curcuitboards i am very interested =)

 

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