Hello All,
Can you assist me to find out the correct value for the attached photo resistors?
When reading using multimter both of them give 0.5 ohm
Regards
Welcome to the forum
DigiKey has a handy online tool for this here:
Use the 5 Band tab
The important spacing is the extra wide space between the green band and the others. That makes it the tolerance band (see drawing on calculator)
Be aware that resistor colors are often not vibrant and obvious and can can fade over time and with heat (e.g. red to orange). So if the value you calculate is not a stock resistor value, try accounting for faded colors.
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Thank you PaulHutch,
but both of them reading using multimeter is 0.5 ohm !! while they are different color.
Regards
Hello @motaz_althaher
Looking at the 1st resistor, the color bands are Brown, Red, White, Gold, Green which would make it a 12.9Ω 0.5% resistor and the parts we have at DigiKey with that resistance and tolerance is part number MFR25SDBE52-12R9 and part number MFR50SDBE52-12R9.
Looking at the 2nd resistor, the color bands are Brown, Gray, White, Gold, Green which would make it a 18.9 Ohms 0.5% and the only part we have at DigiKey with that resistance and tolerance is part number MFR50SDBE52-18R9
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Hi motaz_althaher,
While resistors can degrade over time and have a different resistance value than what they are marked for, the fact that yours are measuring so drastically lower seems that something is amiss. I’d suggest getting the ones Anthony offered above since color markings on resistors are basically universal so those resistance and tolerance values should be correct.
Hope that helps.