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Arduino Programmable Constant Current Power Resistance Dummy Load
Where is the source code?
Looking at the Amazon description I see no reason why that potentiometer should be capable to withstand the load power.You must specifically search for a power potentiometer with a 30+W power rating.On top of that, I would say 8$ for a pot is definitely expensive.
Actually I only see "power rating: 50"... Are you sure it does imply 50 watt?
Sorry Sebastian, but you didn't read the datasheet properly. The adjustment pin is used to adjust voltage to use the LM350 as a Voltage Regulator, in which case the current toward the load is not flowing through the resistor/potentiometer.Using the LM350 as a constant current source all the current going into your load is also flowing through the ADJ resistor (not the ADJ pin though), meaning you need a power potentiometer.Look at figures 31,32 and 34 in the datasheet you linked: in all three of them current coming out of the LM350 is passing through R1, being it a resistor or a potentiometer. Current going into the ADJ pin is still minimal, but the resistor has also to sustain current going into the load.
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The pot MUST sustain the whole sourced current, meaning for 3A at 10V you need a 30W potentiometer... not a very cheap component....
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