Re: power consumption
From: Paul Burridge (pb_at_notthisbit.osiris1.co.uk)
Date: 12/14/04
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Date: Tue, 14 Dec 2004 14:00:28 +0000
On Tue, 14 Dec 2004 06:14:52 GMT, Mac <foo@bar.net> wrote:
>An instrument for measuring electrical current is called an ammeter. Most
>hand-held and bench meters measure Volts, Amps, and a variety of other
>things. To operate in ammeter mode, you usually have to rearrange the
>leads on the meter, and select "DC amps" or something similar.
>
>So, you power up the board from your bench supply, with the ammeter in
>series with the board. First, adjust the bench supply so that the voltage
>ON THE BOARD is correct. The Voltage at the power supply may be a bit
>higher than usual, now, because the ammeter has to have a Voltage drop to
>work. (This means you will need two meters. I hope you have two!)
>
>So once you have the voltage at the right level on the board, record the
>amps going into it, and you have everything you need. (P = VI, but I think
>you know that ;-)
And don't forget to re-rearrange the meter leads immediately after the
current reading is completed!!
-- "What is now proved was once only imagin'd." - William Blake, 1793.
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