But as far as I have seen,
SMD capacitor or inductors has no value on top.
Only resistor has value on top;
and it reads like 104 ==> 100Kohm; 103 ==> 10Kohm,
It is true that normal SMD capacitors have no marking codes written, but there are series that have them, like high-Q and high-freq caps... I'll try to find a table for SMD capacitor marking codes vs. values.
I think you make a mistake when you said "cap value 104==>10000pF = 10nF or 4u7==>4.7uF ok".
If you read 104 in the capacitor, it means 100000pF, so, the real value is 100nF and not 10nF as you said.
Be carefully when you write a post, you can confuse to others.
Best Regards.
GuillerMo
Added after 2 hours 52 minutes:
Often smd electrolytic capacitors are marked whit the value and working voltage.
Sometimes they marked it as "XX xV" (where XX is the capacitor value in uF and xV is the volage).
Another way of marking the voltages is using a simple code, here I give you the codes I remember:
e = 2.5 Volts
A = 10 Volts
C= 16 Volts
D = 20 Volts
E = 25 Volts
V = 35 Volts
H = 50 Volts
I´m sure that exists more codes, but I don´t remember anymore.
It is possible, but can be a waste of time unless you know what your looking for.
ie if I am just looking for some large bypass caps or filter inductors they are easy to find, but a specific value I would have to go probing around for a while. So if you would like to do it, get a LCR meter and some needlepoint probes.
Or you could use an oven to melt all of the components off and sort them by hand, but measuring loose SMD parts is fairly tough.
Hi,
Only Polarized or Electrolytic SMD capasitors carry MARKINGS but no non-polar capacitors. In the early SMD days there was also marking for capacitors but not now. 104=100,000pF =100nF (simple add as many zeros to 10 for the first digit from right, in this case 4,,,,,, 10,0000) and like 101=100pF.
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