Resistance and Capacitance codes

This is basically for my own reference actually. But still I am posting this publicly, as maybe this can help me doing a bitta social service. People who are searching for such information may find this pretty useful, like me.
These are the codes used for resistor values..
First the colour codes...
B - Black 0
B - Brown 1
R - Red 2
O - Orange 3
Y - Yellow 4
G - Green 5
B - Blue 6
V - Violet 7
G - Grey 8
W - White 9

And its like, We read the first three colours, the fourth colour is for tolerance. The way to determine which side to start is, first colour cant be golden or silver or no colour. So, once you go to know the first three colours, get the numbers. If its like, ABC. Then the value of resistance is AB X 10^C. For example, if the code is Brown, Black and Orange, it would be, 1, 0, and 3. Hence the value of resistance will be 10 X 10^3, i.e. 10K.
For tolerance I dont remember excatly at the moment, I'll update as soon as I confirm. What I remember, its like, golden for 5%, silver for 10% and no colour for 20%. Most probably its true, but I'll confirm.

This was for reading the values from resistors. But thee are also ways to write values in shortcut. Like, XRY, where X and Y are some digits. For XRY, the value of resistance is X.Y ohm. For example, for 51R, value is 51 ohm. For 5R4, value is 5.4 ohm. For R43, value is 0.43 ohm. Similarly, there is XKY, where we get value in kilo ohms and XMY, where we get value is mega ohm. SO, 4K7 means 4.7K ohm and 1M0 means 1 mega ohm.



Now lets move on to capacitors.
First lemme discuss values witten on the capacitor. I dunno much about which code for what kind of capacitor. By kind of capacitor I mean ceramic or tantal or blah blah blah. I'll update as soon as I find that. Fine, first of all, for those little capacitors, they have three digits written on them. If it is ABC, then the value is AB X 10^C pF. Like for 104, its 10 X 10^4 pF, i.e. 0.1uF or 100nF. These are for those small circular kinda capacitors.
The are also capacitor known as volume capacitors /* most probably*/. They also have three digits written on the top. For them its like, for ABC, its ABC pF. Like for 331, its 331pF. These capacitors, unlike the previous one, are kinda cylindrical. The one which I talked about earlier were kinda circular.
Next there are some codes like 2A102K. I dont excatly know what does 2A stand for, and actually not even for K. like, for this one, the value is 10 X 10^2 pF, i.e. 1 nF. For 2A472K, its 47 X 10^2, i.e. 4.7nF.
There are some other codes like, ABCJ, where ABC are some digits. AB X 10^C pF. Like for 223J, its 22 X 10^3 pF, i.e. 22nF or 0.022uF.
Bigger capacitors have the value written on them.



Apart from the value, these components have current and voltage rating, respectively. I mean, resistor have current rating, which signifies how much maximum current it can allow. It is usualy not written on the resistor, you will have to ask the shopkeeper, though I am not sure whether even he knows this or not. But I am sure about, the bulkier resistors support more current as compared to smaller ones.
Likewise, the capacitors have voltage rating, means how much maximum voltage across it can be tolerated. Bulkier capacitors have rating written on them. And if we consider a particular type of capacitor, then the size of capacitor increases with capacitance value, and also with voltage rating.



That's it for the moment. I'll keep updating this post with my new findings. And I hope I write some more interesting posts soon. At present, busy with the circuits, that's why writing such post at the moment.

Any ways, we can't forget our FIND OF THE DAY : An engineer always has more than one way to solve any problem. He always selcts the one more complicated, and end up messing everything.:P
This one's my original.

Mechanistic determinism [1]

Its was 6th Dec. Mathematics-III compre the next day. I started in the evening. Mathematics-III, all about differential equations, laplace transformations, fourier series and stuff. I started the new chapter, System of first order equations. They gave an example of how a system of differential equations can help us predict how a system will behave. It was like... a large number of point masses in the space, interacting with each other with gravitational forces only. The differential equations, along with the initial conditions help us to find of the equation of motion of the particles.
After the discussion, there was this line..

"This conclusion underlies the once popular philosophy of mechanistic determinism, according to which the universe is nothing more than a gigantic machine whose future is inexorably fixed by its state at any given moment."

I have a lot to discuss about this deterministic and stuff...
I already have two posts somewhat related to the above mentioned subject : My unified theory of so-called living and non-living and Future prediction possible : what do you "think"??
I don't think I would like to type everything in one go, neither you are gonna appreciate that. So, lemme take it in small modules /* what??? am I taking lectures in some course or what??? */ Whatever... today, I am going to write about randomness.

I guess the only thing which can differentiate living beings from non-living beings is randomness, if it is at all there. I have written a bit about it in the latter post of the two mentioned above. Fine, if we consider only non-living things, the things which are popularly called non-living. I don't think there is any thing random in there. The way they react are pretty well defined by the laws. Maybe a few more laws need to be discovered. Maybe these are suffice. Things seem to be random, but they actually are not. If we are not able to predict the behaviour of a system, its behaviour is random for us. Such systems behave in arbitrary way from our point of view. But they actually follow some laws and behave in some particular way only. Hence, if we get to know how things behave, we can predict and bingo...they are no more random.
Like there is some function in C programming language, it is called random().It is used to get some random number. But obviously, it is based on some algorithm. It does not has a free will to give an absolutely random number. It mainly do some calculations on number of clock ticks and bits stored somewhere in RAM /*not sure about this though*/. So, the number it returns depends on the RAM status, CPU clock ticks completed and stuff. So, even if we know the algorithm, which is not much difficult, its not so simple to keep track of number of CPU clock ticks, memory and all. Hence it is virtually impossible to get to know about the number the function is going to return. But it is possible, I guess you must also agree.
This was just an illustration, I guess poorly explained, but I hope you got the idea what I actually want to say. Non-living things are not random. Their behaviour is deterministic. If the universe is made up of non-living stuff only, it is deterministic.
Now we do find behaviour of living beings random. I guess if a system behaves in two different ways given exactly same conditions, then it is random. I would really be happy to find such a system. Even if we consider some living being, in a thought experiment, if we take a being and put it exactly same conditions twice, it will behave essentially in the same way. I am not able to support the view that the two results will be different. I don't think they will be different. But this makes me non-living, I am not happy... :(. I don't think its of any use to be living if you don't have randomness.. or we can refer to it as freewill. If you don't have a freewill, what's the fun in being living???
Fine, at this moment, I am pretty sure about... behaviour of non-living things is not random. They don't have any freewill. Though I am not yet sure whether we have free will or not, but I am sure that, we are nothing better than a non-living thing if we don't have a freewill.
I have a few more thought experiment lined up, more discussion regarding the topic I will continue, this much is enough for today. And for such discussion posts, I'll have conclusion of the day's discussion as find of the day.

Find of the day : Non-living things are not random. The only thing which living beings can possess which can give them some edge over non-living is... randomness....or freewill.

3rd phase.... almost over

Its been quite somtime since I blogged. I must had been, I was having my compre /* read : semester examinations */. Not yet over, its technical report writing, and I am having three days break. So, it can be said that, just the formalities left to certify that.. its over:) I'll 3/8th engineer.. or shud I say... so-called engineer.
I was planning to write a big post, but not in mood right now. Though I am really really vella, typing is not a problem, I do have ideas. Still...I guess, I'll just postpone it.
C ya soon.

FInd of the Day : Being punctual everytime . . . people will think you have nothing better to do.