Guys, when do you use capacitors and resistors, besides

Question

Guys, when do you use capacitors and resistors, besides

current control and smoothing? I'm pretty inexperienced, but I can't help but feel too overwhelmed when I see a circuit board with like a million resistors and capacitors. Am I that inexperienced and need to go do something like a master's to understand, or am I just forgetting the basics? Cause even my basic current control, pull up and smoothing circuits don't have that many?

#it #programming #russian #web-design

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14.11.2021

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Phill | S Автор вопроса

Ребят, а где кроме регулятора тока и сглаживания используются конденсаторы и резисторы? У меня довольно мало опыта, но я не могу не чувствовать себя слишком подавленным, когда вижу печатную плату с миллионом резисторов и конденсаторов. Я настолько неопытен и мне нужно сделать что-то вроде мастера, чтобы понять, или я просто забываю основы? Потому что даже в моих базовых схемах управления током, подтягивания и сглаживания не так много?

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14.11.2021

Electronics Designer

Well, it would help if you provide an example of a board with million resistors and capacitors. :) Anyway, a typical MCU or FPGA needs several capacitors, at least for each VCC/GND pair. Take for example STM32s in like LQFP64 - and you have four 0.1 uF MLCCs and at least one 4.7 uF tantalum right away, five capacitors already, just for one IC. Oh, and if you use an external crystal you have two more capacitors. Then you have various protection circuits. Then you have pull-ups/downs - it is unwise to hope for built-in resistors in ICs, especially if you have your signal routed off-board. Then you may have some analog circuitry, where you use passive components for timing, gain control, reference current setting and so on, including AC coupling of analog stages. It is typical for RF ICs to require a dozen of capacitors of different values to effectively suppress power supply noise. And if you have RF parts, you'll most probably need capacitors in RF matching circuitry.

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14.11.2021

Phill | S Автор вопроса

Electronics Designer
Well, it would help if you provide an example of a...

I see

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14.11.2021

Phill | S Автор вопроса

Eugene Kilachkoff
Your typical million-resistor board is probably co...

makes a lot of sense

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14.11.2021

Eugene Kilachkoff · Accepted Answer

Eugene Kilachkoff

Your typical million-resistor board is probably composed of a 100'000 smaller sub-circuits and other building blocks, whatever. So 10 passive components per block — not that much!

0

14.11.2021

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Guys, when do you use capacitors and resistors, besides

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