Main Question or Discussion Point
hi, i just bought an inductor that was labeled 68mH, but the colors are violet gray brown silver. doesn't this make it 680uH (0.68mH)?
it's actually gray, violet, gray, brown, grayare you sure you read all the colors correctly?
will do! thanks for the advicein the future, use a 12VAC wall wart power source instead of the AC Mains please. No reason to be shocking yourself or others, or starting a fire...
yup, around 100ohms DC.Did you read its DC resistance beforehand?
the purpose of that test was to measure the current to see if it correlates with my theoretical value (3.2A (the 'violet' turned out to be blue, sorry, and this theoretical is not accounting the DC resistance)), it very much did not. i felt the inductors after disconnecting the circuit, they were rather hot which would actually make sense if they were made of thin wires, conductance would be limited and the resistance would get even higher due to the heat.Did your test change it?
length: less than half the size of a quarter.How big is that thing?
nope, 3.5A fuse in place, .1A measured current.Did the fuse blow?
the store i bought it from looks like they haven't yet gotten their site fully up and running, but it was one of these kinds of inductors, except gray, violet, gray brown gray.Can you post the catalog
yupSet for AC amps?
yup, except, i had the meter on the I_max=20A setting, does this offer more resistance?Test lead plugged into current measuring jack?
digital. is there something that varies between the two?Analog or digital meter?
always! and thanks a bunch for your feedbackGlad you're having fun - this is the age of technology and we should enjoy it to the max.
just for your learning ... note the 2 different colour code systems therethe store i bought it from looks like they haven't yet gotten their site fully up and running, but it was one of these kinds of inductors, except grey, violet, grey brown grey.
No, it offers less. There is an internal resistor and the meter measures the millivolts produced across it, calculates amps by Ohm's law and displays results. They size the resistor for each scale so that it's an easy conversion - like 200 millivolts for 2 or 20 or whatever amps, just move the decimal is all the calculation necessary....yup, except, i had the meter on the I_max=20A setting, does this offer more resistance?
Well, digital meters are always plus or minus one count in the least significant digit.digital. is there something that varies between the two?