Help with two components

[DaveC]

"Third digit is the multiplier (or number of zeros added to the value)"

So the third being '0' means 470 then right? But how do I know it is in 'uH'.

0 zeros would make it 47.

[Tomswork]

@Steve

Here is a common spec for a 470 uh inductor

Inductance-Nom: 470 µHShielding: NoDCResistance: 1.65 ΩCoreMaterial: FerriteTestFrequency: 100 kHzOperatingTempRange: -25 to +70 °C; StorageTemperatureRange: -40 to +125 °C; Dimension: 10.5 x Ø 7.2 mm; NumberofTerminals: 2; RatedCurrent-Max: 0.31 A; PositiveTolerance: ±10 %;

The problem I have found they are coded like 4 band and 5 band resistors. There are also a whole range of sizing from NH to uh like capacitors im sure this coil is used to make a voltage no supplied by the psu I would think 47uh to 470uh depending on the target voltage it should be paired with a ic and a capacitor on the ic do you know the voltage the circuit aims for plus minus im think low current 300ma or so

Tom