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Standardized Electronic Components? Answered

Hello all, I was just wondering about finding electronic components. Some parts, like resistors and capacitors, seem pretty easy to sort out as long as you aren't looking for something out of the ordinary, just find the values you need rated for the wattage, etc. However, in the case of transistors and things like that, I am always seeing many different numbers (people say "a such-and-such transistor, like a {serial number}". Is there some general standardization for these parts? Or at least, some nearly universal sourcing that is considered a "standard"? I only wonder because trying to find components can be a real pain. I have a transistor, I know it's an NPN Darlington transistor, but that's about it. Others that I have salvaged I don't even know that much about. Any explanation or links to sites that explain these things would be much appreciated. Thanks in advance for any help!


some names have a story behind them. for example a 555 is named after a 3 series 5 K resistors inside it some names are made to be related to others. for example 2N3055 is a high power npn txistor and ME2955 is the PNP txistor designed to be used together with 2N3055 some components include one of their parameters in the name. for example 7805 7824 are constant volt supply chips for 5 and 24 V. 80523P333512 and 80523PY400512 are intel pentium 2 processors with 333 / 400 mhz and 512 k cache other components have just random names if you want you can build a list of components you use often and their specs

Looks like that may be the best bet. I know most I'bles have a parts list, maybe the best bet would be to initially order by that and get an idea for the parts. It's just all a bit overwhelming in the beginning, since there's so many parts and many seem very similar.

i know by mind some substitutes for the most common tasks

for example C945 (and H945 etc) is my duct tape small npn txistor for allmost everything. it can be found in huge amounts in allmost any crt monitor or computer power supply in the trash. no need to buy

. If you have the "part number," just type it into Google (or your favorite search engine. Eg, to find info on a 2N414 transistor, just Google 2N414.

I guess it's just not a process I'm used to. I come up with many sites that are really hard to navigate, many in different languages. All I really need is an idea of the kind of loads they can carry and that sort of thing. Also, any books that have practical insight into this sort of thing as well would be great advice. I have one that's about electronics, but it's very theoretical and not too practical on choosing parts. The others I have are obviously suited more towards younger people. I'm still only working with AA/9V projects, so it's not like I have too much worry of working with high voltages or huge currents or anything. I just want to be pretty solid on it before I start working on anything that is going to be plugged into a wall or anything.

. Request a copy of the "NTE Semiconductor Technical Guide and Cross Reference" from NTE Electronics. It should have most of the info you need. They also have an online parts cross-reference.

well, probably not very helpful, but in the begining (like 2N3904) means how many pins the device has minus one. Like diodes (2 pins) are 1n and transistors (3 pins) are 2n

It doesn't help if you already have the transistor in front of you, but it could help you to know what to look for if all you have is a number... Either way, thanks, any tidbits are handy!