Is there anyway to look up what transistors and things do? 2N222, like how do I know what it does to the electronic signal? and a toyo coil...how do i figure out what THAT does to the electric signal?
Transistors can have varying purposes, they can either be used as switching or for analog purpose. On the switching side, a small current can "switch on" a much larger current. When you combine these transistor switches together you can make AND gates, the elemental circuit that a computer needs to operate. Just combine these AND gates, and you can make NAND, NOR, NOT, XOR, XNOR, shift registers, latches, flip-flops, and these parts in turn make complex things like the proccessor in your Mac.
Transistors also can amplify audio signals, say you have input voltage of .00005 V, it could be used to raise it to .5V I must say, that I never really have used transistor for analog purpose.
I dont know what you mean by "Toyo coil" but these coils are called "inductors" An inductor is basically used to store energy in it's magnetic field.
<strong>Sorry I can't help you, but looking at your recent threads has made me curious. What are you making?</strong><hr></blockquote>
Well I have schematics for an EMP (electromagnetic pulse emitter) that I bought, and wheather it works or just creates a magnetic field that is turned pulsed on and off. I am trying to figure out what the parts actually do. I want to understand electronics, I love electronics but don't understand all about them yet (kinda depressing) but I am only in high school and don't have any classes that fit my needs. Also if I want to design things, I need to know what parts can do for me to manipulate the current (is this the correct term?).
[quote]...Transistors also can amplify audio signals, say you have input voltage of .00005 V, it could be used to raise it to .5V I must say, that I never really have used transistor for analog purpose....
...I dont know what you mean by "Toyo coil" but these coils are called "inductors" An inductor is basically used to store energy in it's magnetic field...[/QB]<hr></blockquote>
Haha, HOW do transistors do that? Also thanks, I wasn't really sure what the 'inductor' did.
Ok sorry for the three posts in a row, but if anyone has some good resources to learn about this stuff or just some other forums more about this type of stuff, please feel free to give them to me.
Think of a transistor in terms of a switch which controls electric current. A basic NPN transistor has 3 pins: Collector, base and emitter. You control the current flowing from the collector to the emitter by applying an electric current to the base pin. The amount of base current needed to switch the transitor on is very small.
<strong>Is there anyway to look up what transistors and things do? 2N222, like how do I know what it does to the electronic signal? and a toyo coil...how do i figure out what THAT does to the electric signal?</strong><hr></blockquote>
You can get datasheets from the companies that make your parts usually. National Semiconductor (www.national.com) and Fairchild Semiconductor (www.fairchildsemi.com) are two of the larger makers of discrete parts.
Both National and Fairchild also allow you to order directly if you wish, and will send you free evaluation parts sometimes if you are a student.
You can get free samples from many of the companies, usually you have to pay for shipping and handling. To do this you have to sign up for a online account. Basically this allows them to spam you with emails about their products and mail you brochures and such. Only problem is you have to give your real street address or else your free samples will never get delivered .
For National Semiconductor just look up a part you are interested after you have logged in. If there are samples available for the part there will be a blue samples button next to the red order button.
Comments
Transistors can have varying purposes, they can either be used as switching or for analog purpose. On the switching side, a small current can "switch on" a much larger current. When you combine these transistor switches together you can make AND gates, the elemental circuit that a computer needs to operate. Just combine these AND gates, and you can make NAND, NOR, NOT, XOR, XNOR, shift registers, latches, flip-flops, and these parts in turn make complex things like the proccessor in your Mac.
Transistors also can amplify audio signals, say you have input voltage of .00005 V, it could be used to raise it to .5V I must say, that I never really have used transistor for analog purpose.
I dont know what you mean by "Toyo coil" but these coils are called "inductors" An inductor is basically used to store energy in it's magnetic field.
<strong>Sorry I can't help you, but looking at your recent threads has made me curious. What are you making?</strong><hr></blockquote>
Well I have schematics for an EMP (electromagnetic pulse emitter) that I bought, and wheather it works or just creates a magnetic field that is turned pulsed on and off. I am trying to figure out what the parts actually do. I want to understand electronics, I love electronics but don't understand all about them yet (kinda depressing) but I am only in high school and don't have any classes that fit my needs. Also if I want to design things, I need to know what parts can do for me to manipulate the current (is this the correct term?).
...I dont know what you mean by "Toyo coil" but these coils are called "inductors" An inductor is basically used to store energy in it's magnetic field...[/QB]<hr></blockquote>
Haha, HOW do transistors do that? Also thanks, I wasn't really sure what the 'inductor'
[QB]
Ok sorry for the three posts in a row, but if anyone has some good resources to learn about this stuff or just some other forums more about this type of stuff, please feel free to give them to me.
<strong>
Haha, HOW do transistors do that?
</strong><hr></blockquote>
Think of a transistor in terms of a switch which controls electric current. A basic NPN transistor has 3 pins: Collector, base and emitter. You control the current flowing from the collector to the emitter by applying an electric current to the base pin. The amount of base current needed to switch the transitor on is very small.
<strong>
Well I have schematics for an EMP (electromagnetic pulse emitter) that I bought</strong><hr></blockquote>
Permit me to recommend that you do not attempt to use both an EMP emitter and your Macintosh at the same time.
I'm bored.
<strong>Is there anyway to look up what transistors and things do? 2N222, like how do I know what it does to the electronic signal? and a toyo coil...how do i figure out what THAT does to the electric signal?</strong><hr></blockquote>
The Datasheet for that particular transistor is at <a href="http://www.fairchildsemi.com/ds/PN/PN2222A.pdf"; target="_blank">http://www.fairchildsemi.com/ds/PN/PN2222A.pdf</a>;
You can get datasheets from the companies that make your parts usually. National Semiconductor (www.national.com) and Fairchild Semiconductor (www.fairchildsemi.com) are two of the larger makers of discrete parts.
Both National and Fairchild also allow you to order directly if you wish, and will send you free evaluation parts sometimes if you are a student.
[ 09-07-2002: Message edited by: Eskimo ]</p>
Texas Instruments sample order page is at <a href="https://www-a.ti.com/apps/samp/basket.asp"; target="_blank">https://www-a.ti.com/apps/samp/basket.asp</a>;
For National Semiconductor just look up a part you are interested after you have logged in. If there are samples available for the part there will be a blue samples button next to the red order button.
Fairchild's sample page is at <a href="http://www.fairchildsemi.com/samples/index.jsp"; target="_blank">http://www.fairchildsemi.com/samples/index.jsp</a>;