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.