Electronics > Projects, Designs, and Technical Stuff
Using jumpers to quickly swap components
HendriXML:
--- Quote from: Audioguru on February 20, 2019, 09:19:44 pm ---
--- Quote from: HendriXML on February 20, 2019, 08:58:59 pm ---The way I “calculate” my fuses for instance is that I start with the lowest value one and then climbing up until the new one doesn’t blow any more. :-DD
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I hope you don't do the same with car tires and other car parts.
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Lots of calculations, but gladly also a lot of testing is done when designing car tires. It’s hard to fully model the real world, you must agree on that. Experimenting and checking is as a method simply irreplaceable.
james_s:
--- Quote from: Audioguru on February 20, 2019, 08:49:46 pm ---Wait a minute! Why do you need to swap components?
Because you never learned how to simply calculate their values and you are using "trial and error" instead?
I never guess about component values, I calculate the values by reading the datasheet minimum and maximum spec's for an active device the components are used with. Then my circuits work perfectly without changing anything.
Oh yeah. I buy quality parts, not junk from "over there".
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I calculate to get a reasonable starting point but I often find that I need to tweak things a little in the real world to get some things working properly. Other times I'll be doing more of a seat of the pants thing and just experiment to see the effect of a particular component on the circuit. Being a very visual thinker I find that a lot more interesting than plugging numbers into an equation. Not everybody playing with electronics is a professional engineer and there's no reason to look down on them for that. You have a process that works for you, he has a process that works for him, so what?
I mean did you come here to help, or just to show off how smart you are?
KL27x:
I spent a couple years making "useful stuff" like this. I think it's just a phase some of us go through. :) Prediction. In 2 years, you will be using mostly smd parts and swapping them out with a hot air station.
HendriXML:
--- Quote from: KL27x on February 21, 2019, 12:37:50 am ---I spent a couple years making "useful stuff" like this. I think it's just a phase some of us go through. :) Prediction. In 2 years, you will be using mostly smd parts and swapping them out with a hot air station.
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Just curious, but how does one prototype with smd parts without using designed pcb’s?
Fire Doger:
--- Quote from: HendriXML on February 21, 2019, 12:52:26 am ---
--- Quote from: KL27x on February 21, 2019, 12:37:50 am ---I spent a couple years making "useful stuff" like this. I think it's just a phase some of us go through. :) Prediction. In 2 years, you will be using mostly smd parts and swapping them out with a hot air station.
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Just curious, but how does one prototype with smd parts without using designed pcb’s?
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They don't, they design PCBs *(Unless you mean prototyping something basic that can be calculated on the back of an envelope)
The question is what kind of pcbs
For simple layouts
They break it into small schematics according to functionality and build them individually for faster workflow, debugging etc...
If its simple (no tiny tracks, BGA etc) then probably you can do it on a diy pcb. If you got a set up for home pcds it will be very fast.
It takes me 1h to print it while doing something else at the same time.
For complex layouts (BGA - Multylayer)
You rely on datasheet, examples, appnotes, etc. Good EDA helps too.
Many times "calculating" may be much more expensive than building it.
Everyone at the end have to build it as final product. PCB is part of the circuit and interacts with it. (you can see it clearly when speed-voltage-current-temperature goes up)
Ending with many prototype pcbs is not unusual... The key is to minimise the number/cost of them.
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