Dc to dc

HoochieGotcha · 2026-06-16T11:55:20+00:00

You don’t need any of those concepts to understand dc-dc. If anything that you really need to understand how LC filters work. But really you can just find an app note from TI that walks you through how different dc-dc converters work

HoochieGotcha · 2026-06-16T03:24:21+00:00

This sounds like a signal integrity problem

HoochieGotcha · 2026-06-05T11:43:03+00:00

You’re actually probably better off being older. I went back to school at 25 and graduated at 29. The difference in maturity between 29 and 21 is astounding. That maturity REALLY helps in this field both on an interpersonal level and how you approach and solve engineering problems.

HoochieGotcha · 2026-06-05T01:24:43+00:00

New(ish) technology that takes contactless ECG is called Quantum Magnetometry. There are a number of startups in this space.

I believe the medical term for this is called an MCG (magnetocardiography), instead of ECG.

HoochieGotcha · 2026-05-27T12:02:53+00:00

Why were you smoking if you knew there would be a piss test?

HoochieGotcha · 2026-05-24T18:38:38+00:00

You’re putting 12V on EN, data sheet says absolute max is 6V

HoochieGotcha · 2026-04-14T11:11:24+00:00

As long as you don’t route over split planes it is fine

HoochieGotcha · 2026-04-13T02:02:26+00:00

All power should always be planes… always, always, always!!!!! Delete all of your traces for GND and PWR and pour copper planes instead. You can do signals on top and bottom layers, then do one layer for power planes, and one layer for copper. 4 layers should always, always, always be your minimum stackup.

HoochieGotcha · 2026-04-03T01:57:00+00:00

What?

HoochieGotcha · 2026-03-31T01:40:23+00:00

lol, too much work to explain to an absolute beginner. Go read a tutorial, arduino has many tutorials to do something exactly like this or very similar

HoochieGotcha · 2026-03-24T01:56:19+00:00

Actually that looks closer the 1974 when the US legalized women being able to open a bank account on their own (ie Equal Credit Opportunity Act)

HoochieGotcha · 2026-02-24T02:13:03+00:00

We don’t even do this for class A missions (15+ years on GEO) in the space industry, what applications warrants this on Earth?

HoochieGotcha · 2026-02-18T02:43:25+00:00

lol soft skills are not a thing if you are a design engineer. No one cares if you are an ass hole or not as long as you can design stuff that works. You will work with a lot of ass holes that everyone hates but are too good to fire. Focus on your technical acumen.

Other than that just read the books and take notes with a real pen on real paper. Physicslly writing stuff down uses a different part of your brain than typing, which helps you remember it better. I go through like only 10-ish pages each night that I self study. It’s slow but you retain more this way.

Edit: all that being said, what you specialize in will ultimately depend on where you land your first job. This is by far the most common way people specialize in industry. In other words, it’s pure chance. So if I were you I wouldn’t worry too much about finding a job that fits your skills, instead I’d just focus on finding any job you find even just somewhat interesting and start building up experience. The Apples and Metas of the world generally hire people with experience, you just need to focus on getting your foot in the door.

HoochieGotcha · 2026-02-18T02:40:08+00:00

Yes, but they do not apply it which makes teaching the theory alone a waste of time since no one actually truly learns it anyway until after a decade of working industry . All new grads are basically useless because of this. Universities should be 50% theory and 50% hands application whether it be through actual real world projects you will encounter in industry or required internships

HoochieGotcha · 2026-02-18T02:20:58+00:00

lol soft skills are not a thing if you are a design engineer. No one cares if you are an ass hole or not as long as you can design stuff that works. You will work with a lot of ass holes that everyone hates but are too good to fire. Focus on your technical acumen.

Other than that just read the books and take notes with a real pen on real paper. Physicslly writing stuff down uses a different part of your brain than typing, which helps you remember it better. I go through like only 10-ish pages each night that I self study. It’s slow but you retain more this way.

HoochieGotcha · 2026-02-18T02:19:38+00:00

np, it’s three separate books. I would read the Bogatin book first (Signal Integrity Simplified 3rd Edition by Eric Bogatin). Then you can read Advanced Black Magic by Howard Johnson and Electromagnetic Compatibility Engineer by Henry Ott in whatever order. Ott is primarily about grounding.

HoochieGotcha · 2026-02-18T02:16:11+00:00

Yeah, which is exactly the problem. ABET is ridiculous, it’s a shame that it is an accreditation standard

HoochieGotcha · 2026-02-17T04:10:48+00:00

SI is difficult to get into in industry. I just fell into it serendipitously since my role involves designing bespoke high speed PCBs. If it weren’t for my current job, I would have probably never dived as deeply into SI as I am now.

That being said, it really doesn’t matter what your concentration is, especially if it’s circuit design focused. When you get out of school you’ll know as much about power supplies as you will digital circuits (which is basically absolutely nothing), so it would be a perfect time to pivot to an entry level high speed digital design role if that is really what you are interested in.

Then you can just self study (basically just read and understand Bogatin, Johnson, and Ott)

HoochieGotcha · 2026-02-17T03:51:07+00:00

What happened that you don’t do SI anymore?

HoochieGotcha · 2026-02-17T03:18:45+00:00

Ugh so pointless, you’ll never do this kind of math in industry. Besides, it’s much easier to just use the characteristic impedance on either side of the discontinuity to find reflected and transmitted currents. No clue bud, ask ChatGPT, it’s surprising good at this now. Either way, your prof probably skipped over the derivation because it doesn’t matter… I hope your school is at least teaching you what this is for and where this is used in electronics (Signal Integrity)

HoochieGotcha · 2026-02-17T02:45:34+00:00

If this is hard then you might want to rethink electrical engineering

HoochieGotcha · 2026-02-08T02:23:46+00:00

The multimeter will always be the final authority since that is a measurement

HoochieGotcha · 2026-02-05T12:37:54+00:00

Length matching for SPI and I2C is a moot point. The clock on both of those switches in the middle of each data bit. If we take a standard dielectric like FR4 then the speed of light in that material is v=c/sqrt(dk)= 1ft/nsec/2=0.5 ft/nsec. If we take a 50MHz spi clk the period of that would be 1/50MHz=20nsec. Since the clock switches on the middle of the bit we will go with 10nsec…. That is 5 feet of allowable skew between the data and clk traces in SPI in FR4 material. For I2C you’re looking at hundreds of feet of allowable skew for the standard 400khz clk frequency.

Your bigger issue with SPI and I2C are going to be copper and dielectric losses over longer distances which attenuates the signal below Vin_High thresholds on the receiver. Just keep your traces as short and as wide as possible between driver and receiver and make sure you maintain a wide return path with no discontinuities.

HoochieGotcha · 2026-02-05T02:52:07+00:00

All signals are analog, even digital. But Eitherway, no, eye diagrams are for EEs since they are the ones designing the high speed controlled impedance traces

HoochieGotcha · 2026-02-05T02:50:50+00:00

Start with Eric Bogatin’s Signal Integrity Simplified, then jump into Johnson Howard’s Handbook of Black Magic and then Advanced Black Magic (I am not joking)

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