[MOVED] Alternate Solution for Load Resistor

[arunkish]

Hello All,
I am using PIC MICROCONTROLLER and I have a Load Resistor of 47Ohm 20 WATTS. But it is bulky, I wonder if anyone knows an alternate solution or component for Load Resistors ??? I tried with inductor but ended with failure. Can Inductor be used, if yes... what type of Inductor be used?? Please help me with this..

Thanks a lot

 

[xaccto]

Re: Alternate Solution for Load Resistor

what has the mention of using 'PIC MICROCONTROLLER' got to do with this question ?

An inductor is not strictly a load, but most inductors do have some finite resistance that generates heat.

You can use a MOSFET in its linear bias region as a resistor, must heatsink it to dissipate the heat.
If you are concerned about size dimensions you can use a fan to dissipate heat faster.

you can wind your own resistors using Nichrome wire onto quartz tube - same stuff as in radiant electric heaters - and this works rather well to high powers and
lots of heat! rather fragile to construct however.

 

[arunkish]

Thank you for your reply. Can you give me an example circuit using MOSFET ?? As I said I use 47ohm 20 watt resistor, supply voltage 24V 3A.

Thanks