Good day,
I have setup two lm317 voltage regulators to work as a current limiter.
I have got a 2Ωresister on the output which should give me 620mA.
Now i am having two issues.
1> they are getting warm. I have a heat sink onn that i stole from a psu prom 5 by 6cm which has both of then screwed on ( i also stole that insulative runner sheet and the plastic washer on the screw so that they dont have contact with the heat sink.
If i touch the heat sink it pretty much burns instantly. i don't think this is wright.
2. is it meant to lower the voltage? i am putting in 12v and on the output of the regulator (after the resister) i am only getting 5v ? and if i put in 24v then it goes down to 3v. is this right?? surely it just is meant to limit the current and not affect the voltage? it does correctly limit the current as if i use the multi-meter it says 0.6A
please could you assist me.
Thanks
I have setup two lm317 voltage regulators to work as a current limiter.
I have got a 2Ωresister on the output which should give me 620mA.
Now i am having two issues.
1> they are getting warm. I have a heat sink onn that i stole from a psu prom 5 by 6cm which has both of then screwed on ( i also stole that insulative runner sheet and the plastic washer on the screw so that they dont have contact with the heat sink.
If i touch the heat sink it pretty much burns instantly. i don't think this is wright.
2. is it meant to lower the voltage? i am putting in 12v and on the output of the regulator (after the resister) i am only getting 5v ? and if i put in 24v then it goes down to 3v. is this right?? surely it just is meant to limit the current and not affect the voltage? it does correctly limit the current as if i use the multi-meter it says 0.6A
please could you assist me.
Thanks