22 Sep
2011
22 Sep
'11
9:42 p.m.
7A at 12V gives us about 84W to dissipate. Depending on how deep your
pockets and how you are feeling towards a bit of engineering, you
could do it with enough 5W resistors. Or, probably simpler is to do it
in old style automotive lamps. Not everything has gone over to LEDs so
a couple of lamps connected in parallel should be the go. A quick
check of the web site of the nearest car parts place seems to indicate
that 21W lamps are reasonably common. Four lamps in parallel and you
are away!
Simon.
On 23 September 2011 12:20, Geoffrey Reed <geoffr at zipcon.net> wrote:
6.5-7A max from the powersupply
On 9/22/11 8:03 PM, "Simon Fryer" <fryers at gmail.com> wrote:
--
Simon
--
------------------------------------------------------------------------
"Well, an engineer is not concerned with the truth; that is left to
philosophers and theologians: the prime concern of an engineer is
the utility of the final product."
Lectures on the Electrical Properties of Materials, L.Solymar, D.Walsh
On 23 September 2011 07:31, Geoffrey Reed
<geoffr at zipcon.net> wrote:
It's been quite a while since I've had to
troubleshoot a powersupply and I
have one that is making a loud whine and need to put a load on it to make
sure it is functioning properly. ?Any suggestions? ?It is 12V/24V switchable
output.
What sort of currents are we talking about? A couple of hundred mA
requires a slightly different level of cunning to a couple of hundred
A.
Simon
--
------------------------------------------------------------------------
"Well, an engineer is not concerned with the truth; that is left to
philosophers and theologians: the prime concern of an engineer is
the utility of the final product."
Lectures on the Electrical Properties of Materials, L.Solymar, D.Walsh