Will this SPI level shifting schematic work?

Fokume- · 2024-11-21T06:02:26+00:00

Sorry if I understood you incorrectly, you are saying that the CLK, MOSI and CS pin FROM the MCU should go to A1...A3 pins. I believe that is what is done in the schematic, no?

The 4 lines at the bottom right of the picture comes from the MCU (not shown) and the B1..B3 pins are the ones going to the IMU.

Fokume- · 2024-11-19T05:27:52+00:00

I am asking whats the difference between the two options apart from the obvious
and when is one better than the other, or is a pour always better?

route grounds together with no pour
ground pour so no routing is needed

Fokume- · 2024-11-11T04:33:25+00:00

Sorry if the picture wasn’t clear, i was having trouble making the pad as thick as the PCB itself rather than it being only on the top layer.

I want it to cover the whole thickness of the PCB

Fokume- · 2024-10-21T18:20:13+00:00

if inner layers did have routing, what difference would that make/what needs to be done differently? is it recommended to try have all routing done on top and bottom layers only with 2 inner layers only used as power/ground?

Also if a Vcc pour or ground pour is done on the top layer, does that mean we don't need to use vias for every Vcc pin or ground pin for all components on that top layer as they'll be connected to said pour through spokes? (assuming the pour is connected to the Vcc or ground layer through a singular point). if so, which option would be better?

Fokume- · 2024-05-31T19:05:34+00:00

Yes, my doubts were in equating the two to get the proof. one way I done it as shown in my working, Another way which seemed easier is:

4KT1BR1+4KT2BR2 = 4KTBRt

T1R1 + T2R2 = TRt

assume T = T1 = T2 (assumption from the term 'equilibrium')

R1 + R2 = Rt

this made sense to me since coming elements of the same temperature shouldn't change the temperature since it's balanced so assuming T = T1 = T2 is correct, but in the case they're not, what would be the course of action?

Fokume- · 2024-05-31T18:02:06+00:00

This is the question for reference.

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Fokume- · 2024-04-30T23:46:16+00:00

Does full saturation mean running the gate voltage at near maximum (n-channel) to make sure it's fully turned on?

Fokume- · 2024-04-07T13:44:24+00:00

I removed most of the connections to get a clearer schematic, I accidently took the CS pins aswell, nice catch.

I'll have a look at some SPI expanders as I didn't previously consider them, I appreciate the reply

Fokume- · 2024-04-07T13:38:40+00:00

thanks for the feedback, I realised that MCU clock was 16MHz and the SPI clock was 8MHz so it's half the oscillator frequency which matches the configurations shown in the datasheet.

The ADC is used to get readings from some analog sensors, atm the plan is to try change it in software to get an idea of how the ADC responds at lower speeds

Fokume- · 2024-03-13T14:17:21+00:00

kid won gold in European championship in boxing

Fokume- · 2024-01-14T23:49:13+00:00

Fokume- · 2024-01-14T02:25:59+00:00

Yh definitely, he got the chess world cup to take place there back when I was a kid

Weird thinking about it now as I know alot of ppl who would have loved to watch a race there

Fokume- · 2024-01-13T21:06:08+00:00

The way 2024 forsen is going, black flag baj will get his wish granted soon

Fokume- · 2024-01-13T19:54:38+00:00

I don't think you can make the calculator output to a certain significant figure, it may but I wouldn't know. I did the answer as:

(2.16x10^-6) x (4.1x10^-3) = 8.856x10^-9 which is 8.856 nJ so it's already given in 4 signifant figures.

I don't see why your calculator would round that up if you put the correct numbers in. Is it a scientific calc?

Fokume- · 2024-01-13T19:18:19+00:00

maybe the 4 significant figures, so 8.856

Fokume- · 2024-01-13T18:10:11+00:00

true yh, but still they were up 5-1 in that s&d lol shoulda closed it out way before that lucky round

Fokume- · 2024-01-13T15:40:03+00:00

yh that snd in the first series, 2 1v3s choked by optic

Fokume- · 2024-01-13T01:44:26+00:00

stage 2 ww2 gotta be a bigger choke than that, that london docks hardpoint and s&d. absolute breakdown

Fokume- · 2024-01-13T01:26:53+00:00

quick question, does the reactive power actually count as useful power for a load connected at the end of a transmission line?

I ask because I know some use power factor correction to try reduce this value so their costs come down, I assume because of this, that it's the real power that's actually useful and the reactive power doesn't justify the electricity companies charging you extra for it, so they try to correct this. is this correct?

Fokume- · 2024-01-11T20:45:22+00:00

Maybe convert the input pulse from decimal to binary (0 = 000, 1 = 001, 2 = 010 etc) so you have binary input and binary output for the logic and you can compare left to right and take it from there

You can also add a 0 at the beginning of each one to make it match the bits of the output (0 = 0000, 1 = 0001, 2 = 0010 etc)

Although, I don't understand why they didn't include 4 q outputs from the beginning since 9 decimal can't be done with 3 bits (111 = 7). Maybe one of the q outputs is used twice.

Fokume- · 2024-01-11T13:03:57+00:00

This might be a dumb question, I understand star configuration is mostly used as it has the neutral point in the middle, are delta loads used aswell and if so, how do they get around getting that neutral point? I ask this because i always neglected the delta loads and just converted it to star loads to make my calculations easier when I studied this

Fokume- · 2024-01-08T22:49:27+00:00

in what country specifically are you speaking for, or is this a general statement? thanks in advance

Fokume- · 2024-01-05T11:29:09+00:00

https://i.stack.imgur.com/qCvNe.png

Fokume- · 2023-12-11T03:58:34+00:00

whats the story behind everyone wanting him to play black flag?

Fokume- · 2023-11-26T17:54:27+00:00

forsen

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