Linked Questions

273
votes
5answers
118k views

Rules and guidelines for drawing good schematics

There are a lot of poorly drawn schematics here. A few times people have actually asked for critiques of their schematics. This question is intended as a single repository on schematic drawing rules ...
0
votes
1answer
69 views

Buck converter analysis

I have to reverse engineer a PCB of a buck converter and figure out the component values. Given is that Vin = 15-20V and output is ...
2
votes
2answers
12k views

Arduino IR practice vs. application circuit on 1838 datasheets

There is an explanation of wiring up IR remote controllers for beginners at arduino-info.wikispaces.com/IR-RemoteControl, which suggests wiring the output pin directly into an Arduino pin. I've tried ...
5
votes
4answers
9k views

LM317 circuit capacitor question

I am trying to figure out the significance of the two capacitors recommended for use in an LM317 DC-DC converter circuit. Recommended circuit diagrams show that I should be using a 0.1uf Ceramic ...
53
votes
4answers
87k views

What's the purpose of two capacitors in parallel?

What's the purpose of the two capacitors in parallel on each side of the regulator in this power supply circuit I've seen similar setups in other similar circuits and can guess that it's related to ...
23
votes
6answers
10k views

Frequency dependence of electrolytic capacitors

It's said that electrolytic capacitors behave as inductors at high frequencies, which is why we put small ceramic caps in parallel with them: Electrolytic, paper, or plastic film capacitors are a ...
2
votes
2answers
6k views

Why multiple capacitors in parallel? [duplicate]

Wondering why you would choose to use smaller capacitors in parallel vs one bigger one. Here's an example: Multiple in Parallel Page 4: One larger C Is this a component size and track width choice?...
0
votes
1answer
373 views

how much current does the 74161 4 bit counter needs?

you see, i have this circuit simulate this circuit – Schematic created using CircuitLab however when i add another more 74161 simulate this circuit the first one stops working and it just ...
12
votes
4answers
2k views

Why do we use two parallel capacitors in a voltage regulator circuit? [duplicate]

C1 and C2 are parallel capacitors and their total capacitance is 1000.1 uF. I think C1 is ...
2
votes
1answer
395 views

Decoupling capacitors design [duplicate]

When designing decoupling capacitors why there are always parallel capacitors arrangements with decreasing values? It seems a redundancy to have this kind of configuration because the equivalent ...
27
votes
3answers
21k views

Where did the value of 0.1uF for bypass capacitors come from?

Nearly everyone recommends 0.1uF for bypass capacitors. Why this value? I assume there is no harm to using larger values so is it merely a "sensible minimum"? And if so why do people go for the ...
1
vote
1answer
664 views

RaspberryPi I2C sensor - capacitor's role

I'm new here and the same goes to my electronics "history". I like to understand things I'm dealing with even if I wasn't provided with a sufficient knowledge background at schools. What I'd like to ...
11
votes
3answers
1k views

Parallel Capacitor Conundrum [duplicate]

I have recently taken on a project that involves improving a circuit and there is a couple of instances where there are two capacitors in parallel with each other. The values of these capacitors ...
16
votes
4answers
5k views

Will a 0402 0.01 µF ceramic capacitor next to a 0402 0.1 µF ceramic capacitor have any power decoupling benefits?

I always understood that the point of using smaller capacitors in parallel was to provide low impedance at higher frequencies than the bigger capacitors, because the higher capacitance capacitors '...
0
votes
2answers
875 views

74HCT14 schmitt trigger doesn't improve rise/fall times

I have a square wave signal whose rise and fall times are too big to feed into another 74xx-series logic chip, such as the 74HC175 flip-flop, which requires rise and fall times in the nanosecond range....

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