Leo Hathaway wrote: ↑
Wed Nov 07, 2018 1:05 am
Daily contact with electronic components is a common practice for engineers, but for beginners, even if they have information about the type of components they need, it is a headache when they browse the merchants to buy them. The datasheet is the same, and there are some additional reference values that differ from the use of different materials. I don't know if it's going to affect the circuit I'm going to use, and it's a waste of time to check and ask with too many qusetions. After all, more than one component is needed.
For example, I need an aluminum electrolytic capacitor in the power filter, decoupling circuit, browsed several websites are similar, opening such a website( enclose one of them: https://www.kynix.com/Product/36.html
), what should I look at and focus on?
The range of parts and values is hard to comprehend at first. It seems like there is an endless number of parts out there, and that is because THERE IS!
If you are just getting started with electronics then the most common part is the resistor. Here we have several common values like 10 ohms, 22 ohms 47 ohms, 100 ohms, and then repeat after multiplying by 10 which gives us 220, 470, 1000, and then again by 10 to get 2200, 4700, 10k, and then again 22k, 47k, 100k and then again 220k, 470k, 1Meg. I just gave you a list of more common values, although there are some in between there too, but that gets you started in seeing the big picture here.
Now there are different power ratings, we have 1/4 watt and 1/2 watt the most common, and higher wattage ones are for more specific purposes like 1 watt, 2 watts, 5 watts, 10 watts, and higher than that are for VERY specific purposes.
So you see we have some common values and some for specific purposes. That's the way all electronic parts are in general.
There are small capacitors that follow that same basic rule, and small inductors too, but the inductors also have other specs like series resistance that is very important sometimes. Then larger inductors are for very specific purposes too, and have to be specified in a more exact way.
Then we get into the IC chips, which vary all over the place. Common starter chips are the LM358 like you know about already, and then some logic chips like the CMOS series.
What you might want to do is state what area of electronics you are most interested in. For example, power supplies, RF applications, digital logic, microcontrollers, etc. That way we can direct you to the right parts.
In almost all cases though you need resistors. Some values as above in 1/4 and maybe 1/2 watt sizes unless you intend to do SMD work and then you might choose smaller wattage ratings.
In all cases it helps a lot to know your end application as that ultimately is the deciding factor on what actual parts you need to buy. Some people start with a single project and buy the specific parts for that, then go on to buy other parts later. This seems to be a preferred method for a lot of people because they can start to build something right away with less cost right away.