This circuit addresses that problem.
Lm317 adjustable current limiter circuit.
This is also a pb free device.
A constant current source ccs in electronics is a device circuit that produces a constant value of current regardless of source voltage or load resistance.
It can supply greater than 1 5 a at the output.
The input supply source is connected across the vin and ground of the upper current regulator circuit the output from this stage goes to the input of the lower lm317 variable voltage regulator stage.
The following circuits show some of the basic uses of the lm317 lm338 lm350 series of voltage regulators when configured as a current regulator or constant current source ccs.
Constant current portion of the lm317 based power supply with current limiting.
A constant current circuit can also be used as a current limiter.
It s having a typical line and load regulation of 0 1.
Lm317 is a positive voltage regulator with an adjustable voltage range from 1 25 v to 37 v.
It can also provide float operation for high voltage application.
3d biometrics hyperspectral imaging.
Also see lm317 high power constant current source circuit.
As you determined in your op there s a problem using a variable resistor in a current source mode because all the current goes through the variable resistor.
Precision current limiter schematic for lm317 lm338 lm350.
The lm317 ic helps in current limiting thermal overload protection and safe operating area protection.
If we disconnect the adjustable terminal still lm317 will helpful in overload protection.
1 amp current regulator schematic for lm317 lm338 lm350.
To be precise the upper lm317 forms the current regulator stage while the lower acts like a voltage controller stage.