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Registered Member #1669
Joined: Sun Aug 31 2008, 02:33AM
Location: 127.0.0.1
Posts: 13
So, I have made much progress now, but am facing a slight problem prior to running the capacitors in parallel: I have a bunch of capacitors whose voltage/capacitance are not marked, and I can't figure out how to measure them with a multimeter... They do seem to follow a pattern, they have two lines, the first line being a digit followed by a second digit in parenthesis, the second line being a digit followed by a letter (x,k,c,n,j,b). Two more follow the same first line, but with two letters on the second line (NP and ND), One has 3 digits (570), and one has the odd marking T0404 on the first line, PET on the second. Could someone assist me in determining the meanings of these markings, or refer me somewhere which could show me how to measure the voltage rating of these?
Registered Member #1062
Joined: Tue Oct 16 2007, 02:01AM
Location:
Posts: 1529
are they from flash cameras? There is no way to mesure the voltage and capacitance unless you have a capacitance meter (expensive). If its a camera,and you still have the board from them, mesure the output of that and use that as your voltage rating (+50v could work too) Guess the capacitance by the size compared to others. The stripe indicates cathode.
Registered Member #1669
Joined: Sun Aug 31 2008, 02:33AM
Location: 127.0.0.1
Posts: 13
My multimeter has a setting to measure capacitance, but I seem to not understand how it works... Should I use it when the capacitor is fully charged? Seems like a recipe for disaster.
Registered Member #1669
Joined: Sun Aug 31 2008, 02:33AM
Location: 127.0.0.1
Posts: 13
Ah, that's what I've been doing, getting readings in the millionth of a nanoFarad, though. Perhaps I have been destroying capacitors? Or just slightly less then stellar leads? EDIT: Also, is this a good Bill of Materials for the Boost Converter? 15k Resistor x4,IRFP450 MOSFET,130 µH Inductor,1M Resistor,10k variable resistor,13k resistor,4.7k resistor,68 resistor,1k resistor,500V15A Diode,1nF Capacitor,10nF Capacitor,NE555,LM311 IC
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Capacitors and their ratings, impact.