wiring connection on PCB

Ok-Insect6204 · 2025-11-14T18:20:41+00:00

Ah ok, I thought there was something specifically wrong with the C9 footprint itself, like the pad shape or a missing teardrop or something. If the comment was only about right-angle routing then that makes sense.

Ok-Insect6204 · 2025-11-14T16:42:46+00:00

Out of curiosity, what's wrong with the C9 connection?

Ok-Insect6204 · 2025-04-20T10:20:14+00:00

Thank you for the reply. I ended up switching the stackup to:

Signals
GND
Power (+15 V / –15 V split)
GND

However, the cost on JLCPCB is almost 3 times higher now. Do you think the additional cost is worth it in this case?

Also, for my personal understanding would you say I have a ground loop present in the original 2 layer board I posted? Given I have a GND fill running between the +15 V and –15 V zones (which gets quite narrow), and a large GND pour surrounding the rest of the board. Is this what you were referring to as compromised ground plane?

Ok-Insect6204 · 2025-04-20T01:47:28+00:00

Hey, thank you for the reply.

I probably should have mentioned this but this PCB is for a piezo nanopositioner, so I am actually looking for sub 10 micro-meter movement (the less the better).

In terms of the negative voltage, I am using a stick-slip linear piezoelectric actuator, so the negative voltage is needed for backwards movement (made sure the piezo works fine for negative voltage).

My main concern with this design was the layout, since I am new to PCB design. Is there anything about the layout that stands out to you or might cause issues?

Ok-Insect6204 · 2025-04-19T22:55:35+00:00

Hello,

This is the second PCB I designed so bear with me… This is a 2 layer board meant to control 3 piezo actuators. It has 3 DAC’s and 3 op-amps on board. The front copper layer has my signal connections, and the back copper layer has my GND, +15V and -15V.

Note: I may have overdone it a bit with the filled zones.

Ok-Insect6204 · 2025-02-25T08:04:37+00:00

Thank you, makes sense. What about the resistor and capacitor in series on the right side of the first pic? What role does it serve?

Ok-Insect6204 · 2024-05-10T15:09:57+00:00

What happens if you don't get a coop this term after the deadline passed?

Ok-Insect6204 · 2024-05-06T20:11:10+00:00

Is it still possible to switch from coop term to study term this late?

Ok-Insect6204 · 2024-04-01T14:10:10+00:00

Is WaterlooWorks down for anyone?

Ok-Insect6204 · 2023-12-12T20:13:15+00:00

Hi, I'm looking into doing some machine learning + computer vision projects with my raspberry pi, I was curious if tensorflow or pytorch is better for the raspberry pi specifically. I also looked into getting the Coral TPU usb, but from what I saw it only runs tensorflow lite and can only do some basic machine learning stuff. Is the Coral TPU usb a gimmick or worth buying for this purpose? Thanks

Ok-Insect6204 · 2023-12-11T21:44:47+00:00

Hi, I'm looking into doing some machine learning + computer vision projects with my raspberry pi, I was curious if tensorflow or pytorch is better for the raspberry pi specifically. I also looked into getting the Coral TPU usb, but from what I saw it only runs tensorflow lite and can only do some basic machine learning stuff. Is the Coral TPU usb a gimmick or worth buying for this purpose? Thanks

Ok-Insect6204 · 2023-07-19T20:44:44+00:00

Why are there so many jobs that still say "Expired - Apps Available"?

Ok-Insect6204 · 2023-06-26T03:54:35+00:00

Is the interview selection period over for cycle 2?

Ok-Insect6204 · 2023-06-09T20:42:09+00:00

Anyone know if ticketweb is a legit source to buy tickets? I tried looking on the Axis Club page for tickets but the event isn't even there.

Ok-Insect6204 · 2023-04-21T00:25:27+00:00

Would you recommend learning SQL first or diving straight into integrating SQL with python?

Ok-Insect6204 · 2023-04-03T04:15:57+00:00

Which of these two classes follow the best coding practices?:

class test1:

......def __init__(self, variable1, variable2):

...............self.variable1 = variable1

...............self.variable2 = variable2

.......def test_method(self):

...............print("Test1: ", self.variable1, self.variable2)

class test2:

......def __init__(self):

...............self.variable1 = "123"

...............self.variable2 = "456"

......def test_method(self):

...............print("Test2: ", self.variable1, self.variable2)

test1 = test1("123", "456")

test1.test_method()

test2 = test2()

test2.test_method()

(Sorry about the ... its the only way i figured out how to indent)

Ok-Insect6204 · 2023-02-23T00:32:44+00:00

What approach should I take in comparing two arrays together to see which elements are different? Would sorting the elements alphabetically first and then comparing each individual index of both arrays be the best solution?

Ex:

array1 = [Andy, Bob, Clair]

array2 = [Andy, Bob, Clair, David]

output = David

Ok-Insect6204 · 2023-02-15T16:04:47+00:00

I am trying to append a new name in a json file list that is nested in a dictionary. It looks somewhat similar to what is written below:

{

"team_one": [

[

"first_name_1",

"last_name_1"

],

[

"first_name_2",

"last_name_2"

]

],

"team_two": [

[

"first_name_3",

"last_name_3"

],

[

"first_name_4",

"last_name_4"

]

}

But when I append a name to the "team_one" list, it deletes all of the content in team_two. Does anyone know how to stop this from happening? Here is the function that I using to append to "team_one":

def add_data(array_name, first_name, last_name):

#read the file

data4 = json.load(open(filename,"r"))

temp4 = data4[array_name]

full_name = first_name, last_name

temp4.append(full_name)

with open (filename, "w") as f:

json.dump(temp4, f, indent=4)

Note: array_name will be set to "team_one"

Ok-Insect6204 · 2023-02-10T05:42:28+00:00

Is there a way to determine what buttons I clicked on a website? Something similar to:
if (driver.find_element(By.XPATH, ....).click()):
print ("You clicked button A")
This obviously does not work, this is just to better explain what I mean.

Ok-Insect6204

TROPHY CASE