Another power supply question

[col]

I have an old laptop power supply at 18.5v and 65w that I would like to use to power an IC amp project of around 35w. Can I assume that this will be well regulated as that would remove the need to build a regulation circuit,

Col

[JimRayden]

Taking a wild guess - yes, it's regulated. If you could access an oscilloscope somewhere, you could scope the output...

Another idea... I'm not sure if it's a good one though. Wire a large value capacitor and a multimeter (set on AC volts) in series to the power supply. The cap blocks the DC and the meter only reads AC. (Hmm, don't the meters already have blocking caps built into them?).

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Jimbo

[RDV]

I have an old laptop power supply at 18.5v and 65w that I would like to use to power an IC amp project of around 35w. Can I assume that this will be well regulated as that would remove the need to build a regulation circuit,

Col

Most amp chips don't require a regulated PS, just a well filtered one. Is this a DC or AC PS? Dual DC(+/-)?

RDV

[col]

It is dc. With it powering a laptop I suspect it will be well filtered unless that circuit is in the laptop. I've not actually measured what's coming out of it yet but it says 18.5v 65w and it's centre positive.

Col