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78xx Voltage regulator in PCB view is incorrect #43

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sgang007 opened this issue Feb 6, 2016 · 6 comments
Open

78xx Voltage regulator in PCB view is incorrect #43

sgang007 opened this issue Feb 6, 2016 · 6 comments
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@sgang007
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sgang007 commented Feb 6, 2016

The generic 78xx voltage regulators in to220 tht package has an incorrect PCB view. The middle pin should be ground while the one at left will be Vin and the one at right is Vout.
Due to this bug, fritzing is automatically making wrong connections when changing to the PCB view.

SVG image of the incorrect part

Datasheet of the mentioned part

@aknoerig aknoerig added the bug label Feb 14, 2016
@aknoerig
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Thanks, but I'm not sure what you mean. When you hover over the pins you can see that they are labeled correctly. And that's the information the use should rely on, and also what Fritzing uses internally.
Or do you mean the rectangle shape of pin 1?

@sgang007
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@ aknoerig : Since the pins are labelled incorrectly, the PCB layout is not being drawn correctly after I make a schematic diagram in Fritzing. In the PCB view, the 78XX regulators are shown as GND,VIN and VOUT instead of VIN,GND,VOUT.
I just made an entire power distribution circuit using several of these regulators in the schematic view and then when I moved to the PCB layout to take a printout, I just realized everything was incorrect. Then I had draw the entire circuit on hand, which was a very tedious job.

@el-j
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el-j commented Feb 15, 2016

(here is the difference between igo and adj to220 sparkfun voltage regulators)
ok i checked this out. the pinout from schematic to pcb view is consistent from my point of view. the
gnd is ground and in the middle. vin is left, vout is right.
image

image

but we have a bug in breadboard view. gnd is left und vin is in the middle.

image

@el-j
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el-j commented Feb 15, 2016

as i see on the screenshots the adj variant is more inconsistent. this has to be fixed

@sgang007
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The ground is incorrect in the PCB view also. The terminal with surrounding square should be the ground to be consistent with other parts.
You cannot see the difference because you just connected resistor which is not dependent on polarity. Try connecting two 78XX regulators with common ground and go to PCB view, you will see the connection on the left pin.

@mMerlin
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mMerlin commented Apr 13, 2017

Is it really the GND that is supposed to be the square pad? I thought it was supposed to be pin 1. Which in many, but, as shown here, not all cases is the ground.

@KjellMorgenstern KjellMorgenstern added this to the 0.9.9 milestone Aug 21, 2021
ctice36 added a commit to ctice36/fritzing-parts that referenced this issue Aug 28, 2021
Issue: 78xx Voltage regulator in PCB view is incorrect
Correction:
1. PCB view - Pin terminal 1 and 2 switches.
2. Schematic view - Pin assignment name change (as referred to L7800 Series).
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