Reply to "Amp Gauge waving like a beauty queen in a parade"

rrs1Member

quote:
Originally posted by Rocky:
quote:
special one because of the massive current or can I just live with

Wolfgang -

The most current you can get across the resistor is I = V/R = 12 / 27 = ~ .3333 Amp

The power in the resistor is P = I*V = 4 Watts

So you should try and find a 5 Watt Resistor. This will probably be pretty big.

Good Luck

Rocky

That would be true if the resistor was sharing the load, but it's not. All the current passes through the internal shunt. The resistor only serves to change the behavior of the movement.

5/8/143:30 PM

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