I have been given a project to make a 2 ampere constant dc current source.
Can anyone explain to me the simplest method to do it? I have only 2 days, please help me!
How accurate must the 2A be?
What supplies are available?
Do the supplies vary, and if so, by how much?
What load is it driving?
Does the load vary, and if so, by how much?
Are there any size or weight constraints?
Is it supposed to be portable?
When do you need it?
How much money have you got to pay for it?
Sir this current source will be used to supply 2A constant dc current to variable loads. Portability isnt required. The current should be constant. Power supply can be of any suitable type.(Also tell me the most suitable power supply).(I am a first semester engineering student).
Use an LM338K in a TO-3 package configured as a current source. It only requires one resistor in addition to the LM338K. You will need a power supply that can deliver two amps and a voltage that is 2.5V higher than whatever voltage might be developed on the output. It will need a large heatsink.
Exactly Sir! I am from Rawalpindi, Pakistan. One more question sir. Which one among LM338K and LM340 would be better to implement this 2A dc current source project and why?