implimenting led to indicate a load is attached

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Zak28

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Is there a simple way to impiment a LED so it would fire only when the load is connected to the circuit?

 

Hi,

Maybe use a shunt in the power supply line.
Depending on load current and resistor value you get a voltage drop.
Use this voltage drop to activate a LED. Either directly, or with an amplifying bjt.

Klaus.
 
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KlausST said:
Hi,

Maybe use a shunt in the power supply line.
Depending on load current and resistor value you get a voltage drop.
Use this voltage drop to activate a LED. Either directly, or with an amplifying bjt.

Klaus.
Click to expand...

The 41v power supply constantly sources ~3.5mA regardless if load is attached to circuit.
 

Hi,

Impossible.
The load is 1mOhms with a series resistor of 1500 ohms...this should give about 27mA at 41V.

Klaus
 
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