I have two resistors listed here that are burned up on this board. They are similar to the others next to it. I am pretty sure the big one is a .56 ohm resistor but unsure about the smaller one. Any help here?
HI @kenneth.hillen ,
There seems to be another similar circuit configuration next to the damaged one. I bet the resistors are same for both. Kindly show a bit larger photo. Be prepared to replace the opto-isolator too.
Cheers, heke
The resistor code calculator can be useful–larger item might be closer to 5.6Ω.
'Aint no reading colors off resistors once they’ve reached the extra-crispy stage. Check adjacent instances of similar circuit for clues as Heke suggests, and draw inferences from the circuit itself as to what would make sense. Type example of the optocoupler referenced is here.
Hello Again,
The tool Rick offered, the resistor calculator will help you find the resistance values and tolerance larger resistors.
The bands do not tell you the watt requirements. You can estimate the wattage by selecting the size in the filters, in the through hole resistor section.