Transistors and IC's up to my eyeballs!!
FreezeSukka
Posts: 41
I'd like to get everyone's opinion on this one.
I was wanting to stock up on items like transistors, for example.· I run into circuits everyday that I'd eventually like to make, and·it seems that most require transistors or some sort of IC's.· I want to just stock up on the most common parts to have so that I can build these circuits right then and there, instead of needing to order the parts and by that time I've forgetten about the whole thing anyway.· Also, it gets rather costly to buy just a few parts here and there and pay a huge shipping cost for a couple of items that can fit into a regular envelope.
To make a long story short,
I'd like to know what a good stock of transistors and IC's would be.
········· (Example: --· 20 each· -- ·2N3904 ·--· NPN· --)
··········(Example: --· 10 each· --··LM555··--)··················
I would really appreciate any and everybody's input on this one.
One of these days I'll actually be able to·answer questions on here instead of being the one who only asks the questions!· btw: Just got my copy of the "TTL Cookbook" in the mail today, maybe I can learn something from it.· I remember reading a little while ago a post about this book and it seemed that everyone on here praised it like it was a golden bible!
Thanks for the help once again!
~Jeff~
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P.S. This is what this part of the alphabet would look like if "Q" and "R" were eliminated.
Post Edited (Jsjga) : 9/1/2005 12:28:44 AM GMT
I was wanting to stock up on items like transistors, for example.· I run into circuits everyday that I'd eventually like to make, and·it seems that most require transistors or some sort of IC's.· I want to just stock up on the most common parts to have so that I can build these circuits right then and there, instead of needing to order the parts and by that time I've forgetten about the whole thing anyway.· Also, it gets rather costly to buy just a few parts here and there and pay a huge shipping cost for a couple of items that can fit into a regular envelope.
To make a long story short,
I'd like to know what a good stock of transistors and IC's would be.
········· (Example: --· 20 each· -- ·2N3904 ·--· NPN· --)
··········(Example: --· 10 each· --··LM555··--)··················
I would really appreciate any and everybody's input on this one.
One of these days I'll actually be able to·answer questions on here instead of being the one who only asks the questions!· btw: Just got my copy of the "TTL Cookbook" in the mail today, maybe I can learn something from it.· I remember reading a little while ago a post about this book and it seemed that everyone on here praised it like it was a golden bible!
Thanks for the help once again!
~Jeff~
▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
P.S. This is what this part of the alphabet would look like if "Q" and "R" were eliminated.
Post Edited (Jsjga) : 9/1/2005 12:28:44 AM GMT
Comments
I hope that this isn't too much trouble.· Thanks!
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P.S. This is what this part of the alphabet would look like if "Q" and "R" were eliminated.
Post Edited (Jsjga) : 9/1/2005 12:34:51 AM GMT
What I do, is when I need a part. I buy a whole bunch (100 to 5000) of them (if there aren't too expensive).
I get a much better price and I figure "If I needed it once, I'll probably need it again" and I figure it's a "lifetime supply".
All of this is of course, if I have the bucks at the time.
Bean.
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"SX-Video·Module" Now available from Parallax for only $28.95
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Product web site: www.sxvm.com
"One experiment is worth a thousand theories"
·
www.glitchbuster.com/
Buy what you need to get started....but buy them in bulk.· Need 10x1k resistors....buy 100.
This is how my 'wall' got built...took many years and there was even some DTL IC's in there!
I do love showing this off!! haha
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·
Steve
"Inside each and every one of us is our one, true authentic swing. Something we was born with. Something that's ours and ours alone. Something that can't be learned... something that's got to be remembered."
But while you're at it, buy a few items that you may not need right away but that you might want to hack around with someday - ADC chips, low-noise op-amps, optocouplers, mixers, maybe some TTL family you've never worked with before.
Try to find some local Ham radio swap meets, meet some local Hams and you'll probably get a lot of stuff cheap or free. That way, as you learn circuitry and you smoke a few parts, it won't hurt so bad.
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·
Steve
"Inside each and every one of us is our one, true authentic swing. Something we was born with. Something that's ours and ours alone. Something that can't be learned... something that's got to be remembered."
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P.S. This is what this part of the alphabet would look like if "Q" and "R" were eliminated.
If you are unsure, buy no more than a dozen.
I bought a lot of 555s, but don't have time for them - too simple for my learning curve and new projects.
If you buy NPN transistors, why aren't you buying their compliment PNP [noparse][[/noparse]to make h-bridges or other symetrical circuits] So I buy 2n3904s and 2n3906s.
If you are buying low power for the same price as higher power, why?
So, I buy the 2n2222 instead of the 2n3904 and the 2n2907 instead of the 2n3906.
In most situations, I can use either - but why have both when one the more powerful one works in both cases?
With resistors, you don't need all the values in quantity - buy a card. Get a lot of 10K ohm because they are standard for pull-ups or pull-downs for TTL. Get 470ohms for LEDs at 5volts. If you buy a 1 ohm 1/4watt resistor, you will likely burn it up [noparse][[/noparse]and learn something about Watts]. 100ohms is just about the bottom line for 1/4 or 1/8 watt resistors.
Don't buy wire in spools unless you have to wire an intercom or doorbell. Buy a yard of 25 strand, multicolored wire for small projects and cut a bit off as you need. Get both solid wire and stranded.
Darlington transistors are nice, but be aware that they run hotter than regular transistors because there are two in one package. So, don't think of them as the do-all be-all jump from a BasicStamp to a relay if you are going to keep the thing on for hours. Take a closer look at the specifications.
Don't buy capacitors under 25volts, unless you are sure that is what you need. You will more than likely have more need for a variety of capacitors in higher voltages. 6.3volt and 10volt are too close to the safety margin and may fail.
The expensive DIP sockets are intended for permanent use. If you plan to plug and unplug an IC [noparse][[/noparse]or your BasicStamp], the cheaper socket will cause less wear and tear on you IC - less bent pins when pulling out.
ZIF sockets are quite beautiful and extremely expensive. You probably don't need one unless you are building a production line or a universal programmer. Still, they really impress all your friends that know nothing about what you are really doing [noparse][[/noparse]carry a Calcilus book everywhere you go and people will thing you are Albert Einstien even though you never read it.]
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G. Herzog in Taiwan
~Jeff~
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P.S. This is what this part of the alphabet would look like if "Q" and "R" were eliminated.